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{{Infobox aircraft occurrence | name = EgyptAir Flight 990 | image = Egypt Air Boeing 767-366ER; SU-GAP@ZRH, October 1999 BZS (5552623021).jpg | image_upright = | image_size = 260px | alt = | caption = SU-GAP, the aircraft involved in the accident, in October 1999, weeks before the accident | occurrence_type = Occurrence | date = October 31, 1999; 25 years ago (October 31, 1999) | summary = {{Bulleted list|Intentionally crashed into ocean (NTSB)Cite error: A <ref> tag is missing the closing </ref> (see the help page). The ECAA concluded that the incident was caused by mechanical failure of the aircraft's elevator control system. The report suggested several possibilities for the cause of the accident, focusing on the possible failure of one of the right elevator's power control units. However, the NTSB dismissed the ECAA report after it was found that no scenario could explain the doomed flight's final movements other than an intentional human act.

Aircraft, crew, and passengers

Aircraft

Flight 990 was being flown in a Boeing 767-366ER aircraft with registration SU-GAP, named Tuthmosis III after a pharaoh from the 18th Dynasty. The aircraft, a stretched, extended-range version of the standard 767, was the 282nd 767 built. It was delivered to EgyptAir as a new aircraft on September 26, 1989.

Cockpit crew

Flight 990's cockpit crew consisted of 57-year-old Captain Ahmed El-Habashi, 36-year-old First Officer Adel Anwar, who was switching duty with another co-pilot so he could return home in time for his wedding, 52-year-old relief Captain Raouf Noureldin, 59-year-old relief First Officer Gameel Al-Batouti, and the airline's chief pilot for the Boeing 767, Captain Hatem Rushdy. Captain El-Habashi was a veteran pilot who had been with EgyptAir for 36 years and had accumulated about 14,400 total flight hours, more than 6,300 of which were on the 767. Relief First Officer Al-Batouti had close to 5,200 flight hours in the 767 and a total of roughly 12,500 hours.

Because of the 10-hour scheduled flight time, the flight required two complete flight crews, each consisting of one captain and one first officer. EgyptAir designated one crew as the "active crew" and the other as the "cruise crew", sometimes also referred to as the "relief crew". While no formal procedure specified when each crew flew the aircraft, the active crew customarily made the takeoff and flew the first four to five hours of the flight. The cruise crew then assumed control of the aircraft until about one to two hours before landing, when the active crew returned to the cockpit and assumed control of the aircraft. EgyptAir designated the captain of the active crew as the pilot-in-command or the commander of the flight.

While the cruise crew was intended to take over far into the flight, relief first officer Al-Batouti entered the cockpit and recommended that he relieve the command first officer 20 minutes after takeoff. Command first officer Anwar initially protested, but eventually relented.

Passengers

The flight was carrying 203 passengers from eight countries: Canada, Egypt, Germany, Sudan, Syria, the United States, and Zimbabwe. Of the 217 people on board, 100 were American, 89 were Egyptian (75 passengers, 14 crew), 21 were Canadian, and seven were of other nationalities. Of the American passengers, 54, many of them elderly, were booked with the tour group Grand Circle Travel for a 14-day trip to Egypt. Of the 203 passengers, 32 boarded in Los Angeles; the rest boarded in New York. Four were nonrevenue EgyptAir crew members. Included in the passenger manifest were 33 Egyptian military officers returning from a training exercise; among them were two brigadier generals, a colonel, a major, and four other air force officers. After the crash, newspapers in Cairo were prevented by censors from reporting the officers' presence on the flight.

The authorities at John F. Kennedy International Airport (JFK) used the JFK Ramada Plaza to house relatives and friends of the victims of the crash. Due to its similar role after several aircraft crashes, the Ramada became known as the "Heartbreak Hotel".

Flight details

At 1:20 am EST (06:20 UTC), the aircraft took off from JFK's runway 22R. At 1:44, the flight reached cruising altitude of 33,000 feet. At 1:48, the captain El-Habashi left the cockpit and went to the lavatory. During that time, relief first officer Al-Batouti was alone in the cockpit. At 1:48:39, he began to exclaim, "I rely on God," and at 1:49:45, disengaged the autopilot. The disengage warning was not heard on CVR as it was done manually, and for the next 10 seconds, the aircraft remained at straight level.

First dive and recovery

At 1:49:53, throttles of the engines were moved to idle, and 2 seconds later, the aircraft went into a rapid dive nose-first, resulting in weightlessness (zero-g) throughout the cabin. Despite this, the captain was able to fight the lack of gravity and re-enter the cockpit. The speed of the 767 was now dangerously close to the sound barrier, exceeding its design limits and beginning to weaken its airframe. At 1:50:19, the flight reached the maximum rate of descent, 39 000 feet per minute. The captain pulled back on his control column and applied full power to the engines, but neither action had any effect due to the aircraft's speed and the engines having been shut down. The captain then deployed the speedbrakes, which slowed the aircraft's dive, bringing it back to a safer speed. Both engines then stopped completely, causing the aircraft to lose all electrical power and both flight recorders to stop at this point. FDR stopped at 1:50:36, while the first dive ended at 1:50:38, at the same time CVR stopped.

Climb, second dive, and crash

The flight recorders stopped by 1:50:38, and after that it is not possible to know what was happening on the flight. Abrupt maneuvers made by crew to recover from the dive resulted in the aircraft entering a steep climb, causing g-forces to push the passengers and crew into their seats. The 767 subsequently climbed from 16 000 feet back to 25 000 feet by 1:51:15, and during that climb, the heading changed from 80° to 140°.

At 1:51:15, the aircraft fell into another steep dive and huge mechanical stress caused the left engine to separate from the wing. Average descent rate in second dive was around 20 000 feet per minute. The aircraft began to break apart in midair at 10,000 ft (3,000 m) and debris crashed into the Atlantic Ocean at 1:52 am EST, with the last signal received at 1:52:05. All 217 people on board were killed.

Air traffic control

US air traffic controllers provided transatlantic flight-control operations as a part of the New York Air Route Traffic Control Center (referred to in radio conversations simply as "Center" and abbreviated in the reports as "ZNY"). The airspace is divided into "areas", and "Area F" was the section that oversaw the airspace through which Flight 990 was flying. Transatlantic commercial air traffic travels via a system of routes called the North Atlantic Tracks, and Flight 990 was the only aircraft at the time assigned to fly North Atlantic Track Zulu. Also, a number of military operations areas are over the Atlantic, called "warning areas", which are also monitored by New York Center, but records show that these were inactive the night of the accident.

Interaction between ZNY and Flight 990 was completely routine. After takeoff, Flight 990 was handled by three different controllers as it climbed up in stages to its assigned cruising altitude. The aircraft, like all commercial airliners, was equipped with a Mode C transponder, which automatically reported the plane's altitude when queried by the ATC radar. At 01:44, the transponder indicated that Flight 990 had leveled off at FL330. Three minutes later, the controller requested that Flight 990 switch communications radio frequencies for better reception. A pilot on Flight 990 acknowledged on the new frequency. This was the last transmission received from the flight.

The records of the radar returns then indicate a sharp descent, with the plane dropping 14,600 ft (4,500 m) in 36 seconds before its last altitude report at 06:50:29 Coordinated Universal Time (UTC; 01:50:29 Eastern Standard Time). Several subsequent "primary" returns (simple radar reflections without the encoded Mode C altitude information) were received by ATC, the last being at 06:52:05. At 06:54, the ATC controller tried notifying Flight 990 that radar contact had been lost, but received no reply. Two minutes later, the controller contacted ARINC to determine if Flight 990 had switched to an oceanic frequency too early. ARINC attempted to contact Flight 990 on SELCAL, also with no response. The controller then contacted a nearby aircraft, Lufthansa Flight 499 (LH 499), a Boeing 747 en route from Mexico City to Frankfurt, and asked the flight's crew to try to raise Flight 990, but they were unable to make radio contact, although they also reported they were not receiving any emergency locator transmitter signals. Air France Flight 439, another Boeing 747 en route from Mexico City to Paris, was then asked to overfly the last known position of Flight 990, but that crew reported nothing out of the ordinary. Center also provided coordinates of Flight 990's last known position to Coast Guard rescue aircraft.

Flight recorders

The cockpit voice recorder (CVR) recorded the captain excusing himself to go to the lavatory, followed 30 seconds later by the first officer saying in Egyptian Arabic "Tawkalt ala Allah," which can be translated as "I put my trust in God." A minute later, the autopilot was disengaged, immediately followed by the first officer again saying, "I rely on God." Three seconds later, the throttles for both engines were reduced to idle, and both elevators were moved 3° nose down. The first officer repeated "I rely on God" seven more times before the captain suddenly asked repeatedly, "What's happening, what's happening?" The flight data recorder (FDR) reflected that the elevators then moved into a split condition, with the left elevator up and the right elevator down, a condition that is expected to result when the two control columns are subjected to at least 50 pounds-force (220 newtons) of opposing force. At this point, both engines were shut down by moving the start levers from run to cutoff. The captain asked, "What is this? What is this? Did you shut the engines?" The captain is then recorded as saying, "get away in the engines" (this is the literal translation that appears in the NTSB transcript), followed by "shut the engines". The first officer replies "It's shut". The final recorded words are the captain repeatedly stating, "Pull with me" but the FDR data indicated that the elevator surfaces remained in a split condition (with the left surface commanding nose up and the right surface commanding nose down) until the FDR and CVR stopped recording. No other aircraft were in the area, and no indication was given that an explosion occurred on board. The engines operated normally for the entire flight until they were shut down. From the presence of a western debris field about 1,200 ft (370 m) from the eastern debris field, the NTSB concluded that the left engine and some small pieces of wreckage separated from the aircraft before water impact.

Search-and-rescue operations

The aircraft crashed in international waters, so the Egyptian government had the right to initiate its own search and rescue and investigation. Because the government did not have the resources to salvage the aircraft, the Egyptian government requested that the United States lead the investigation. The Egyptian government signed a letter formally ceding responsibility of investigating the accident to the United States.

Search-and-rescue operations were launched within minutes of the loss of radar contact, with the bulk of the operation being conducted by the United States Coast Guard. At 03:00 EST, an HU-25 Falcon jet took off from Air Station Cape Cod, becoming the first rescue party to reach the last known position of the plane. All U.S. Coast Guard cutters in the area were immediately diverted to search for the aircraft, and an urgent marine information broadcast was issued, requesting mariners in the area to keep a lookout for the downed aircraft.

At sunrise, the United States Merchant Marine Academy training vessel T/V Kings Pointer found an oil sheen and some small pieces of debris. Rescue efforts continued by air and by sea, with a group of U.S. Coast Guard cutters covering 10,000 sq mi (26,000 km) on October 31, 1999 with the hope of locating survivors, but no bodies were recovered from the debris field. Eventually, most passengers were identified by DNA from fractured remains recovered from the debris field and the ocean floor. Atlantic Strike Team members brought two truckloads of equipment from Fort Dix, New Jersey, to Newport, Rhode Island, to set up an incident command post. Officials from the United States Navy and the U.S. National Oceanic and Atmospheric Administration (NOAA) were dispatched to join the command. The search-and-rescue operation was suspended on November 1, 1999, with the rescue vessels and aircraft moving instead to recovery operations.

The U.S. Navy rescue and salvage ship USS Grapple (ARS-53), the U.S. Navy fleet ocean tug USNS Mohawk (T-ATF-170), and the NOAA survey ship NOAAS Whiting (S 329) arrived to take over salvage efforts, including recovery of the bulk of the wreckage from the seabed. The FDR and CVR were recovered within days by the U.S. Navy's Deep Drone III submersible. In total, a C-130 Hercules, an H-60 helicopter, the HU-25 Falcon, and the U.S. Coast Guard cutters USCGC Monomoy (WPB-1326), USCGC Spencer (WMEC-905), USCGC Reliance (WMEC-615), USCGC Bainbridge Island (WPB-1343), USCGC Juniper (WLB-201), USCGC Point Highland (WPB-82333), USCGC Chinook (WPB-87308), and USCGC Hammerhead, along with their supporting helicopters, participated in the search.

A second salvage effort was made in March 2000 that recovered the aircraft's second engine and some of the cockpit controls.

Investigations

Under the International Civil Aviation Organization treaty, the investigation of an aircraft crash in international waters is under the jurisdiction of the country of registry of the aircraft. At the request of the Egyptian government, the US NTSB took the lead in this investigation, with the Egyptian Civil Aviation Authority (ECAA) participating. The investigation was supported by the Federal Aviation Administration, the Federal Bureau of Investigation, the United States Coast Guard, the US Department of Defense, NOAA, Boeing Commercial Airplanes, EgyptAir, and Pratt & Whitney Aircraft Engines.

Initially, there was speculation that the crash was related to the 1991 crash of Lauda Air Flight 004, which was caused by an uncommanded thrust reverser deployment, leading to a similar nose dive from cruising altitude. The two 767s involved were assembled back-to-back and had identical Pratt & Whitney PW4000 engines.

Two weeks after the crash, the NTSB proposed declaring the crash a criminal event and handing the investigation over to the FBI. Egyptian government officials protested, and Omar Suleiman, head of Egyptian intelligence, traveled to Washington to join the investigation.

Defection of Hamdi Hanafi Taha

In February 2000, EgyptAir 767 captain Hamdi Hanafi Taha sought political asylum in London after landing his aircraft there. In his statement to British authorities, he claimed to have knowledge of the circumstances behind the crash of Flight 990. Taha attested that first officer Gameel Al-Batouti had intentionally crashed the plane to exact revenge on an airline executive, who had recently demoted Al-Batouti, and happened to be onboard. Taha also is reported to have said that he wanted to "stop all lies about the disaster," and to put much of the blame on EgyptAir management.

Osama El-Baz, an adviser to Egyptian President Hosni Mubarak, said, "This pilot can't know anything about the plane; the chances that he has any information are very slim." EgyptAir officials also immediately dismissed Taha's claim. American investigators confirmed key aspects of Taha's information, but decided not to anger the Egyptian government further by issuing any official statement about Al-Batouti's motive. EgyptAir terminated Taha's employment, and his application for British asylum was reportedly declined, though he gave an extensive 2002 newspaper interview in London, and a 2005 documentary credited him as "Exiled Captain".

NTSB investigation and conclusion

The NTSB investigation centered on the actions of the relief first officer, Gameel Al-Batouti. The NTSB determined that the only way for the observed split elevator condition to occur was if the left seat pilot (the captain's position) was commanding nose up while the right seat pilot (the first officer's position) commanded nose down. As the Egyptian investigation forwarded various mechanical failure scenarios, they were each tested by the NTSB and found not to match the factual evidence. The NTSB concluded that no mechanical failure scenario either they or the Egyptian investigation could come up with matched the evidence on the ground, and that even if mechanical failure was a factor, the 767's design would have made the situation recoverable.

The NTSB's final report was issued on March 21, 2002, after a two-year investigation, and concluded as "not determined".

From the NTSB report's "Summary" section:

1. The accident airplane's nose-down movements did not result from a failure in the elevator control system or any other airplane failure.

2. The accident airplane's movements during the initial part of the accident sequence were the result of the relief first officer's manipulation of the controls.

3. The accident airplane's movements after the command captain returned to the cockpit were the result of both pilots' inputs, including opposing elevator inputs where the relief first officer continued to command nose-down and the captain commanded nose-up elevator movements.

From the NTSB report's "Probable Cause" section:

The National Transportation Safety Board determines that the probable cause of the EgyptAir flight 990 accident is the airplane's departure from normal cruise flight and subsequent impact with the Atlantic Ocean as a result of the relief first officer's flight control inputs. The reason for the relief first officer's actions was not determined.

ECAA investigation and conclusion

After formally ceding responsibility for the investigation of the accident to the NTSB, the Egyptian authorities became increasingly unhappy with the direction the investigation was heading, and launched their own investigation in the weeks following the accident. The ECAA report concluded that "the Relief First Officer did not deliberately dive the airplane into the ocean" and that mechanical failure was "a plausible and likely cause of the accident".

William Langewiesche, an aviation journalist, said: "n the case of the Egyptians, they were following a completely different line of thinking. It seemed to me that they knew very well that their man, Batouti, had done this. They were pursuing a political agenda that was driven by the need to answer to their higher-ups in a very pyramidal, autocratic political structure. The word had been passed down from on high, probably from Mubarak himself, that there was no way that Batouti, the co-pilot, could have done this. For the accident investigators in Egypt, the game then became not pursuing the truth, but backing the official line."

Responses to reports

The NTSB investigation and its results drew criticism from the Egyptian government, which advanced several alternative theories about mechanical malfunction of the aircraft. The theories proposed by Egyptian authorities were tested by the NTSB, but none was found to match the facts. For example, an elevator assembly hardover (in which the elevator in a fully extended position sticks because the hinge catches on the tail frame) proposed by the Egyptians was discounted because the flight recorder data showed the elevator was in a "split condition". In this state, one side of the elevator is up and the other down; on the 767, this condition is only possible through flight control input (i.e., one yoke is pushed forward, the other pulled backward).

Some evidence indicated that one of the right elevator's power control units may have suffered a malfunction, and the Egyptian investigation mentioned this as a likely cause of the crash. While noting that the damage did indeed exist, the NTSB countered that it was more likely a result of the crash rather than a pre-existing problem, as the 767 is designed to remain airworthy even with two PCUs failed.

Media coverage

While the official investigation was proceeding, speculation about the crash ran rampant in both Western and Egyptian media.

Western media speculation

Long before the NTSB issued its final report, Western media began to speculate about the meaning of the recorded cockpit conversations and about possible motives – including suicide and terrorism – behind Al-Batouti's actions on the flight. The speculation, in part, was based on leaks from an unnamed federal law-enforcement official that the crew member in the co-pilot's seat was recorded as saying, "I made my decision now. I put my faith in God's hands."

During a press conference held on November 19, 1999, NTSB chairman Jim Hall denounced such speculation, and said that it had "done a disservice to the long-standing friendship between the people of the United States of America and Egypt."

On November 20, 1999, the Associated Press quoted senior American officials as saying that the quotation was not in fact on the recording. It is believed that the speculation arose from a mistranslation of an Egyptian Arabic phrase (Tawkalt ala Allah) meaning "I rely on God."

London's Sunday Times, quoting unnamed sources, speculated that the relief first officer had been "traumatised by war," and was depressed because many members of his fighter squadron in the 1973 war had been killed.

The unprecedented presence of 33 members of the Egyptian general staff on the flight (contrary to standard operating procedure) fed a number of conspiracy theories. Some opined that it was an action (and potentially a conspiracy) of Muslim extremists against Egypt. Others countered that Mossad had targeted them.

Egyptian media reaction and speculation

The Egyptian media reacted with outrage to the speculations in the Western press. The state-owned Al Ahram Al Misri called Al-Batouti a "martyr", and the Islamist Al Shaab covered the story under a headline that stated, "America's goal is to hide the truth by blaming the EgyptAir pilot."

At least two Egyptian newspapers, Al Gomhuria and Al-Musawar, offered theories that the aircraft was accidentally shot down by the US. Other theories were advanced by the Egyptian press, as well, including the Islamist Al Shaab, which speculated that a Mossad/CIA conspiracy was to blame (since, supposedly, EgyptAir and El Al crews stayed at the same hotel in New York). Al Shaab also accused US officials of secretly recovering the FDR, reprogramming it, and throwing it back into the water to be publicly recovered.

Unifying all the Egyptian press was a stridently held belief that "it is inconceivable that a pilot would kill himself by crashing a jet with 217 people aboard. 'It is not possible that anyone who would commit suicide would also kill so many innocent people alongside him,' said Ehab William, a surgeon at Cairo's Anglo-American Hospital."

The Egyptian media also reacted against Western speculation of terrorist connections. The Cairo Times reported, "The deceased pilot's nephew has lashed out in particular against speculation that his uncle could have been a religious extremist. 'He loved the United States,' the nephew said. 'If you wanted to go shopping in New York, he was the man to speak to, because he knew all the stores.'"

Reaction of the Egyptian public

William Langewiesche, an author, journalist, and aviator, said that in Cairo, he encountered three groups of people. He said that the ordinary Cairenes believed that an American conspiracy existed to attack EgyptAir 990 and that the Americans were covering up the fact. He added that a small group of Cairenes, mostly consisting of "intelligentsia", "knew perfectly well that Batouti, the co-pilot, had pushed that airplane into the water, and that the Egyptian government was stonewalling and was engaged in what they saw as a typical exercise in Egyptian governing." Langewiesche said that "people involved directly in the investigation" had "presented a uniform party line, a uniform face with very few cracks. They stonewalled me, and that in itself was very interesting." Langewiesche argued that "in the stonewalling, they were revealing themselves" and that if they truly believed Batouti were innocent, they would have invited Langewiesche to see proof of this theory.

Aftermath

After the crash, the airline changed the flight number for the JFK to Cairo route from MS990 to MS986, with the outbound changing from MS989 to MS985, and discontinued the service to Los Angeles. Flight 986 is operated using a Boeing 787-9 Dreamliner.

A monument to EgyptAir Flight 990 is in the Island Cemetery in Newport, Rhode Island.

In popular culture

Al Jazeera, an Arabic-language channel, produced a documentary by Yosri Fouda about the flight that was broadcast in March 2000. The documentary looked at the preliminary NTSB conclusion and speculations surrounding it. In the documentary, the NTSB data were used with a flight simulator of the same aircraft model to try to reconstruct the circumstances of the crash, but the simulator failed three times to replicate the NTSB theory for plunging a fully functioning 767 from 33,000 ft (10,000 m) to 19,000 ft (5,800 m) in 37 seconds. However, a 2001 journalist describes how he successfully reproduced the incident in a Boeing flight simulator.

The events of Flight 990 were featured in "Death and Denial", a season-three (2005) episode of the Canadian TV series Mayday (called Air Emergency and Air Disasters in the U.S. and Air Crash Investigation in the UK and elsewhere around the world). The episode was broadcast with the title "EgyptAir 990" in the United Kingdom, Australia, and Asia.

In response to the ECAA's claim of NTSB unprofessionalism, former NTSB director of aviation safety Bernard Loeb stated:

What was unprofessional was the insistence by the Egyptians, in the face of irrefutable evidence, to anyone who knows anything about investigating airplane accidents and who knows anything about aerodynamics and airplanes, was the fact that this airplane was intentionally flown into the ocean. No scenario that the Egyptians came up with, or that we came up with, in which there were some sort of mechanical failure in the elevator control system, would either match the flight profile or was a situation in which the airplane was not recoverable.

The Mayday dramatization of the crash was based on ATC tapes, as well as the CVR recordings. In interviews conducted for the program, the relief first officer's family members vehemently disputed the suicide and deliberate crash theories, and dismissed them as biased. The program nevertheless concluded that Al-Batouti crashed the plane for personal reasons; he had been severely reprimanded by his supervisor for sexual harassment after allegedly "exposing himself to teenaged girls and propositioning hotel guests", and the supervisor was, in fact, on board the plane when it was brought down.

This dramatization also depicts the relief first officer forcing the plane down while the command captain attempts to pull the plane up. Despite this, upon conclusion, the program stresses the official NTSB conclusion and the fact it makes no mention of a suicide mission. Rather, it simply states that the crash was a direct result of actions made by the co-pilot for reasons "not determined".

See also

• 1990s
• Aviation
• Egypt
• United States

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40. "Death and Denial". Mayday. Season 3. Episode 8. 2005. Discovery Channel Canada / National Geographic Channel.
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External links

External image
Pre-accident photos of SU-GAP from Airliners.net

• NTSB Final Report (Archive)
• ECAA Final Report (Archive)
• ATC transmission transcript (Archive)
• Cockpit Voice Recorder transcript and accident summary
• Flight data recorder data summary (Archive)
• NTSB debris image links Structural debris, structural debris, engine debris
• Media links:
  • "Egyptair crash" – The Guardian – Archive of various news stories
  • Egypt's ambassador praises work on Flight 990 probe – CNN
  • 217 feared dead in EgyptAir crash – CNN
  • Crash of Flight 990 – CBS News
  • Mubarak receives calls of condolences – Egyptian State Information Service
• Other links:
  • MS990 – PlaneCrashInfo.com
  • MS990 – AirDisaster.com
  • Accident description at the Aviation Safety Network
  • EgyptAir Crash Mystery – MacLean's Magazine
  • EgyptAir 990 Passenger List – St. Petersburg Times

 This article incorporates public domain material from websites or documents of the National Transportation Safety Board.

• 1999 in Egypt
• 1999 in Massachusetts
• Accidents and incidents involving the Boeing 767
• Airliner accidents and incidents in Massachusetts
• Aviation accidents and incidents in 1999
• Aviation accident investigations with disputed causes
• Conspiracy theories involving aviation incidents
• Egypt–United States relations
• EgyptAir accidents and incidents
• Marine salvage operations
• History of Nantucket, Massachusetts
• October 1999 events in the United States
• Airliner accidents and incidents involving deliberate crashes