For Immediate Release
January 16, 2009
Contact: Alison Duquette or Les Dorr
Phone: (202) 267-3883
Federal Aviation Administration (FAA) regulations consider situations where external influences — such as flocks of birds — may interfere with safe operations. When the FAA certificated the Airbus A320, design and operating procedures considered flight into a flock of birds, crew emergency landing procedures, occupant protection and emergency landings in water.
Engine Bird Ingestion
The A320 involved in the January 15, 2009 emergency landing in the Hudson River was powered by two CFM56-5B4/P engines, which were certified to meet these requirements:
- Flocking Birds — The engine must be able to ingest a flock of birds (five 1.5 lb. birds), not lose more than ¼ of its power and continue to run for five minutes at its takeoff power setting.
- Single Bird — The engine must be able to ingest a single large bird (4 lbs.) and be able to shut down safely. When a large bird is ingested, no continued operation is required.
The A320 was certified for ditching (landing in water), meeting the following requirements:
- The plane must be able to float under reasonable conditions long enough to allow evacuation of passengers.
- The airplane must float in such a way that there are sufficient exits about water.
Airbus elected to certify the A320 to meet the latest requirements for passenger protection during emergency landing, commonly know as the “16g seat requirement.”
Pilot/Crew Procedures for Emergency Landings
US Airways pilots and crews are required to train for emergency landings, including landings in water.
Flight attendants get initial and recurrent training in ditching procedures, including:
- Cabin preparations
- Raft drills
- Passenger preparations
Pilots receive ditching training at their initial indoctrination with the airline using a case study of a 1970 ditching by a DC-9, then later receive A320-specific instruction during recurrent training. Areas covered include:
- Aircraft “clean-up” (configuration for ditching)
- Communications with air traffic control and cabin crewmembers
- Crew resource management
- Ditching direction, based on wind or calm, swell direction
- Post-ditching procedures, e.g., signaling, survival, first-aid
- Ditching procedures if aircraft is above 10,000 feet — assume crew has time to execute all checklist items.
- Ditching procedures below 10,000 feet — more succinct, covering basic items, i.e., landing gear up, configure aircraft for most lift (including recommended slat configuration for both engines out), ATC/cabin crew communications, systems on and off, post-ditching procedures.
- Procedures for dual-engine failures — assume crew has time to attempt a restart, procedures for restart failure, step-by-step actions to perform at specific altitudes.