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05 February 2016

This week in airline safety and security - 5 February 2016

First fatal airliner event of 2016
The February 2nd in-flight explosion on a Daallo Airlines A321 over Somalia led to the death of one passenger and was the first fatal airliner event of 2016. At present, the investigation into the explosion is ongoing, and the authorities in Somalia have not ruled out the possibility that the explosion was caused by a bomb.

Because of the nature of the event, and the ongoing challengers faced by the government of Somalia, there may not be a full and open investigation of the event. For a fuller description of the problems that the Somali government may have with the investigation, please read this recent article from's Todd Curtis

A recent crash with many similarities to the Daallo event involved a MetroJet A321 last October.

This week's A321 event was the 13th time at least one airline passenger was killed on an A320 series aircraft.

Accident report from fatal AirAsia crash from December 2014 now available
The Indonesian government recently release their final report into the 28 December 2014 crash of an AirAsia A320 that killed all 155 passengers and seven crew members. The authorities concluded that a combination of system malfunctions and crew actions led to the crash.
Crash description and a link to the accident report

Laser encounter near Heathrow leads to arrest
Earlier this week, police near London's Heathrow airport arrested a man who allegedly pointed a laser at an aircraft. Laser encounters are a serious threat not only in the United Kingdom, but also in the United States, with over 20,000 laser encounters reported in the US between 2004 and 2014.

For a detailed look at the patterns of laser encounters in the US, as well as two Todd Curtis interviews with the BBC on laser threats to aircraft, please visit


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30 June 2015

Airline safety and security review for the first half of 2015

Promech Air crash siteIn the first six months of 2015, identified eight noteworthy events, but only the two involving passenger deaths on aircraft models commonly used by airlines in the US and the EU. Those two events would be used to compute fatal event rates for particular aircraft models .

The event which has attracted by far the most media attention, as well as the most traffic at, is the Germanwings crash in March that was apparently due to deliberate actions taken by the first officer. The first officer apparently locked the captain out of the cockpit, and no one was able the get through the armored cockpit door before the aircraft crashed. This was actually the second time in the past two years were one flight crew member locked out the other flight crew member and then crashed the aircraft. The Germanwings event also represented the seventh time since 1980 where a flight crew member deliberately crashed an airliner.

The eight total events consisted of two airliner crashes with passenger fatalities, two airliner landing accidents without fatalities, two crashes involving Hollywood celebrities, one fatal sightseeing flight, and military aircraft that crashed while carrying over 100 civilian family members of military personnel.

The eight total events for the first six months of 2015 were above the average seen in the previous decade, and two the numbered events were below the average. For the 10 years from 2005-2014, there were an average of 6.4 noteworthy events, of which an average of 3.4 were numbered events. In the past decade, the fewest events in the first six months happened in 2006, with one event, which was also a numbered event. The most total events, 12 occurred in 2008, and the most numbered events, five, occurred in 2007, 2009, and 2011.

  1. 4 February 2015; TransAsia Airways ATR 72-600; B-22816; flight GE235; near Magong, Taiwan: The aircraft was on a scheduled domestic flight between Taipei and Kinmen Island, Taiwan. The airplane crashed into a river shortly after takeoff from Songshan Airport in Taipei. The aircraft hit a bridge, as well as a vehicle on that bridge, before plunging into the Keelung River. Shortly before hitting the bridge, the aircraft rolled sharply to the left. Four of the five crew members, including both pilots, and 39 of 53 passengers were killed. The two people who were in the vehicle were both injured.

    This was the second fatal plane crash in less than a year for TransAsia Airways. Having two or more plane crashes in less than a year has happened over 35 times since 1970.
    ATR 72 plane crashes
    Flight GE235 Wikipedia entry
    Other TransAsia Airways plane crashes

    5 March 2015; Delta Air Lines MD88; N909DL; flight DL1086; New York, NY: The aircraft was on a scheduled domestic flight between Atlanta and New York's La Guardia Airport, and had a landing excursion that led to an emergency evacuation. The aircraft landed on runway 13 and departed to the left side of the runway, coming to rest on a dike that separated the runway area from the waters of Flushing Bay. At the time of the event, it had been snowing, with freezing fog conditions and below freezing temperatures. The aircraft was also affected by both a crosswind and a tailwind during the landing. An A319 that had preceded the Delta jet had reported good braking action on runway 13. None of the 125 passengers or five crew members were seriously injured.
    MD80 plane crashes
    Other Delta plane crashes

    5 March 2015; Ryan ST3KR Recruit; N53178; Santa Monica, CA: Actor Harrison Ford was the pilot and sole occupant of a Ryan ST3KR Recruit, a two-seat, open cockpit aircraft that was used extensively as a training aircraft by the US military in WWII. According to a preliminary report from the NTSB, Ford reported a loss of engine power shortly after taking off from the Santa Monica airport, and was attempting to return to runway 3 at Santa Monica.

    Ford chose to land on a nearby golf course, clipping the top of a tree before landing. The aircraft was seriously damage, and Ford was hospitalized with serious injuries. This was Harrison Ford's third crash involving an airplane or a helicopter.
    Plane crashes involving Harrison Ford

  2. 24 March 2015; Germanwings A320-200; D-AIPX; flight 4U9525; near Barcelonnette, France: The aircraft was on a scheduled international flight from Barcelona, Spain to Düsseldorf, Germany. About a half hour after takeoff, while at a cruising altitude of 38,000 feet, the aircraft began losing altitude, and crashed about ten minutes later. The investigative authorities suspect that the first officer deliberately crashed the aircraft. All six crew members and 144 passengers were killed.
    More details on the Germanwings crash
    Lufthansa plane crashes
    A320 plane crashes
    Flight 9525 Wikipedia entry
    Airliners deliberately crashed by a flight crew member

    Early stage of the accident investigation

    29 March 2015; Air Canada A320-200; C-FTJP; flight AC624; near Halifax, Canada: The aircraft was on a scheduled domestic flight from Toronto to Halifax, Canada. At the time the aircraft entered the Halifax area, visibility was limited due to both darkness and snowfall, and the aircraft entered a holding pattern before attempting a landing. During final approach, the aircraft touched down about 300 meters short of the runway, apparently hitting a combination of power lines and a localizer array before sliding onto the runway. The aircraft slid down the runway about 1000 meters, coming to rest just off the left side of the runway.

    Damage to the aircraft included collapsed main and nose landing gear, both engines severely damaged, with the left engine sheared off, separated radome, and damage to the wings, stabilizers, and underside of the fuselage. While there was a fuel leak, there was no post crash fire. There were no severe injuries among the five crew members and 133 passengers.
    Air Canada plane crashes
    A320 plane crashes

    22 June 2015; Short S312 Tucano T; N206PZ; near Ojai, CA: Composer James Horner, who created music for over 150 movies, including "Star Trek II: The Wrath of Khan," "48 Hrs.," and "Aliens," and who won two Oscars for his work in "Titanic," was killed in the crash of his Short Tucano in southern California. Horner was the only person on the aircraft.
    More on this event
    Celebrity plane crashes

    25 June 2015; Promech Air; DeHavilland DHC-3T Turbine Otter; N270PA; near Near Ketchikan, AK: The aircraft was on an unscheduled excursion flight in the area of the Misty Fjords National Monument, and crashed into an area of steep, mountainous terrain. The pilot and all eight passengers were killed. The passengers were from a cruise ship, and were on a sightseeing flight.

    30 June 2015; Indonesia Air Force C130B; A-1310; Medan, Indonesia, AK: The aircraft was on a nonscheduled domestic flight from Medan to Tanjung Pinang and crashed into a residential neighborhood shortly after takeoff. The aircraft had a crew of 12 and 101 civilian passengers. The crew had reportedly requested a return to the departure airport. The passengers were military family members and the aircraft who were headed to Tanjung Pinang for Ramadan related activities.

    Other Years
    1996, 1997, 1998, 1999

    2000, 2001, 2002, 2003, 2004
    2005, 2006, 2007, 2008, 2009

    2010, 2011, 2012, , 2013, 2014

    Most recent crashes

14 May 2015

Why the Amtrak train crash in Philadelphia is like a plane crash

The crash of Amtrak Northeast Regional Train 188 in Philadelphia, PA on May 12, 2015 involved an Amtrak passenger train, but in many ways this train crash was like a plane crash, specifically in the ways that the major US media outlets responded to the event. It is extremely rare for train crashes to generate intense media interest, but this kind of attention is routine for airline crashes. Upon closer review, the media response to the Amtrak crash is not so surprising.

Although it has only been a couple of days since the crash, the NTSB accident investigation team has revealed key details of the events that led to the crash. In short, it looks like the train was traveling just over 100 mph (161 kph), and derailed after entering a curve that had a 50 mph speed limit.

There were five crew members and about 240 passengers on board. Seven of those passengers were killed, and several dozen passengers and crew members were injured.

NTSB Board Member Robert Sumwalt at crash site

Amtrak accidents are common
While this accident has received the kind of attention usually given a major plane crash (for example, continuous coverage from major news networks that includes having news anchors at the crash site), Amtrak accidents are actually quite common. According to the Federal Railroad Administration, over the last decade, Amtrak has been involved with accidents and incidents that have resulted in over 1,000 deaths.

(Click to enlarge)

In the last three years, Amtrak has been involved in over 50 accidents per year, with 21 in the first two months of 2015.

(Click to enlarge)

Why this crash stands out
The circumstances around the Philadelphia crash that have led to an intense amount of media attention include where it happened, who was on the train, and perhaps more importantly, who is likely to travel by train on that route.

The crash took place on not only the most heavily traveled route in the Amtrak system, with over 12 million riders in 2011, it is also a route that connects New York City with Washington, DC, two metropolitan areas where many members of the US financial, political, and media elite live and work.

Many of the elite members of US society, even if they don't live or work in New York or Washington, have either traveled on that route on many occasions, or know friends, colleagues, or family members who do. A quick review of some of those killed in the crash can give you an insight into the kinds of people who regularly travel on this route. The dead include:

  • A tech company CEO
  • A software architect for a major news media organization
  • A US Naval Academy midshipman
  • A university dean
  • A senior vice president of a Fortune 100 company

Given the ongoing media coverage, it is very likely that the most influential business, political, and media decision makers throughout the US are not only keenly aware of the accident, but can also imagine circumstances where they could have been on that train that night. If it had been a jet airliner traveling between major cities in the northeast US, the airliner's passenger list would have likely reflected the profile of the people on that Amtrak train.

These are the reasons why the traveling public, especially the more influential members of the traveling public, may feel about this train crash the same way they would perceive a plane crash, as something that could happen to them.

Additional resources
Amtrak Northeast Corridor overview 2011

Federal Railroad Administration
National Transportation Safety Board

07 May 2015

Ongoing Harvard health studies need input from pilots and flight attendants

Flight attendants and pilots face unique stresses and risks due to exposures that occur in the aircraft, as well as from issues outside of the aircraft such as fatigue brought on by disrupted sleep patterns. Understanding what those risks are, and what factors are associated with those risks, is a difficult and ongoing challenge that is being addressed in part by the following two studies from the Harvard T.H. Chan School of Public Health. has teamed up with Harvard to encourage pilots and flight attendants to participate in a pair of studies that will help improve the scientific understanding of health issues faced by airline professionals.

Flight Attendant Health Study
All US flight attendants are encouraged to participate in this flight attendant health study by taking the survey at

Past studies have found that sleep disorders, fatigue, depression and heart disease were greatly increased in female flight attendants compared to the US population. Check out the survey today to help make it both larger and more comprehensive than previous studies.

Airline Pilot Health Survey
Past studies on flight attendants showed significantly higher prevalence for some types of health risk. This current study intends to collect similar information from pilots to see if their work environment is also associated with increased health risks. All current and former airline pilots, from any country, are encouraged to visit to take this anonymous survey.

About your privacy
The researchers have taken steps to ensure that your surveys will be anonymous, and that it will not be possible to link any survey to a specific individual. In addition, you can skip any questions that you do not wish to answer, or withdraw from the survey at any time.

06 May 2015

French authorities release preliminary report on the Germanwings crash investigation

On 6 May 2015, the BEA (Bureau d'Enquêtes et d'Analyses pour la Sécurité de l'Aviation Civile) released a preliminary report on the crash of Germanwings flight 4U9525 which highlighted the following findings:

  • At about three minutes after the aircraft reached its cruising altitude of 38,000 feet, the captain left the cockpit.

  • Within 30 seconds of the captain leaving the cockpit, the first officer commanded the aircraft to descend to 100 feet, which is well below ground level.

  • Within five minutes of the commanded altitude change, the airspeed was changed at least ten times, reaching a maximum of 350 knots (402 mph, 648 kph).

  • The descent rate reached a maximum of 5,000 feet per minute, and averaged about 3,500 feet per minute.

  • The descent was continuous, and controlled by the autopilot.

  • Air traffic controllers and the French military attempted to contact the aircraft several times, but received no response.

  • Before the collision with the terrain, there were multiple aural warnings heard on the CVR.

  • The aircraft impacted the ground about 10 minutes and 13 seconds after the aircraft started its descent.

  • Autopilot and autothrust remained engaged until impact.

  • On the previous flight, while the captain was out of the cockpit, the first officer twice commanded the aircraft to descend to 100 feet for short periods of time.

The role of the first officer in the crash
The preliminary report did not state a definitive cause of the crash, but it did state that during the cruise phase, the first officer was alone in the cockpit and intentionally modified the autopilot instructions to order the aircraft to descend until it collided with the ground. The report also stated that the first officer did not open the cockpit door during the descent, despite requests for access made via the keypad, with cabin interphone, and by knocking on the door.

Aircraft trajectory

(click to enlarge)

First officer training history
The preliminary report provided an outline of the first officer's training history, including the fact that he started his flight training at the Lufthansa Flight Training Pilot School in Germany on 1 September 2008, but that his training was suspended for medical reasons for over eight months, from 5 November 2008 to 26 August 2009. It was during this period, specifically from April to July 2009, that the first officer did not have a valid medical certificate due to depression and his medical treatment for his condition.

From October 2010 to March 2011, he continued his flight training in the US, but was under contract as a flight attendant with Lufthansa for over two years before beginning his training to become an A320 first officer. He was appointed as an A320 copilot in June 2014.

Related information
Germanwings crash details from
Lufthansa plane crashes
Other A320 crashes
Germanwings Wikipedia page
Flight 9525 Wikipedia entry

24 April 2015

The suprising chemicals that may be in your emergency oxygen system

A recent article in described a reality that may surprise some passengers. In short, the passenger emergency oxygen system used in some airliners may generate small amounts of toxic chemicals in addition to oxygen. While that may sound a bit scary, the risks to passenger is rather low.

Two types of systems
Passenger emergency oxygen systems provide oxygen from either a centralized oxygen supply system that supplies the oxygen to every passenger, or it is supplied by a chemical oxygen generator that provides oxygen for a small number of masks. Depending on the generator, it may contain a combination of chemicals, which may include sodium chlorate, potassium perchlorate, barium peroxide, or iron powder, that when activated give off oxygen as a byproduct of a chemical reaction.

Chemical oxygen generator hazards
The greatest risks from chemical oxygen generators is the heat that they may generate. However, airliners are designed to take this into account. The other basic risk is exposure to some of the byproducts from the chemical reaction. While the oxygen is filtered before reaching a passenger, is it possible that the trace amounts of chemical byproducts that remain may affect a passenger.

Hypoxia basics
Hypoxia is a condition where the human body is deprived of sufficient oxygen needed for normal bodily function. Hypoxia affects the central nervous system, and those effects may range from impaired judgment and decision making capability, to unconsciousness and death. In an aircraft that has lost cabin pressure while flying at high altitudes, the easiest way to prevent hypoxia is to breathe oxygen from the emergency oxygen system until the aircraft can descend to a lower altitude.

More on hypoxia
You can find an overview of hypoxia risks on If you are interested in the effects of hypoxia on pilots and passengers, you may want to check out this hypoxia overview from the FAA.

Resources article about the chemicals in aircraft emergency oxygen systems
Hypoxia overview
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03 April 2015

Are people with a history of depression or suicide attempts allowed to fly? - Yes they are!

The unfolding investigation of March 2015 crash of Germanwings flight 9525 has revealed that it is very likely that the first officer locked the captain out of the cockpit, and proceeded to deliberately crash the aircraft into the French Alps. Reports by French and German authorities, as well as by Lufthansa, the parent organization of Germanwings, suggest that not only did the first officer have a history of depression, but that Lufthansa was aware of the first officer's condition. Reportedly, German investigators stated that the first officer had been recently treated for suicidal tendencies, but it was not clear if Lufthansa or Germanwings were aware of those recent treatments.

One basic question that many air travelers have is how can anyone with a documented mental illness have become a pilot for a major airline. While the answer in the case of the Germanwings crash may not be revealed until the investigation is complete, it is possible to address that question for US airlines.

The role of medical certificates
In the US, in order to fly, a person holding an airline transport pilot (ATP) certificate, which is the type of certification that any US airline pilot must have, must possess an FAA medical certificate. The specific regulatory requirements regarding mental conditions for those holding an ATP certificate holder are spelled out in the US Code of Federal Regulations (Title 14, Part 67.107). The FAA allows physicians with specialized training to be an Aviation Medical Examiner (AME), who is responsible for evaluating a pilots medical fitness. If a pilot does not pass the examination, that pilot is not legally allowed to fly.

FAA Guide for Aviation Medical Examiners
The FAA provides AMEs with detailed guidance in a number of ways, including publications like the 2015 Guide for Aviation Medical Examiners, which had an update on 19 March 2015, just five days before the Germanwings crash. The document clearly states that a pilot has to respond to a detailed medical questionnaire, and must reveal a history of mental disorders, including depression or suicide attempts. While such a revelation would lead to further investigation, it would not automatically lead to a denial of a medical certificate.

The pilot who is suspected to have deliberately crashed Germanwings flight 9525 conducted part of his airline flight training in the United States several years ago, and would have been subject to FAA regulations during that period.

What do the airlines do?
While it is clear that the FAA allows people with a history of depression or suicide attempts to fly, it is unclear what the policy of individual airlines may be with regards to a pilot with this kind of medical history. What and airline knows about a pilot's medical history will depend on what that pilot would voluntarily reveal, as well as what the airline may legally be allowed to know. Because this would largely depend on where that airline is located, it is possible that what an airline in one country can know about their pilot's medical history may be radically different from what an airline in another country may know.

Resources FAA medical certificate questions and answers
Germanwings flight 9525 crash information
Lufthansa plane crashes
Other A320 crashes
Germanwings Wikipedia page
Flight 9525 Wikipedia entry