20040617009879I

Incident

FAA incident report · Boeing 757-223 · San Francisco, CA · June 17, 2004

Date
June 17, 2004 · 09:30 local
Place
San Francisco, CA
Airport
San Francisco International
Phase of flight
Takeoff Ground Roll
Operating rules
Air carrier (Part 121)
Operator
AALA
Aircraft
N623AA
Reported as
Boeing 757223
Reported engine
Rolls-Royce RB211*
People aboard
195
Fatal injuries
0

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-23) On June 17, 2004, American airlines flight 44 departed San Francisco International Airport, enroute to jfk. At approximately 0930, just prior to aircraft rotation on take off the crew reported they lost both airspeed indicators, both altimeters, both vertical speed indicators, both flight directors, auto throttle, auto pressurization 1 and 2, both eec, rudder ratio, mach trim, tacas, altitude reporting/audio alert, requiring the use of standby instrumentation only. The aircraft returned to sfo, landing safely without injury to crew or passengers. It was determined, after inspection by American airlines maintenance personnel, at San Francisco, the failure of both air data computers was attributed to the units not being securely fastened in the avionics compartment rack, causing the units to become loose, and rendered inoperable.

As the FAA filed it

(-23) ON JUNE 17, 2004, AMERICAN AIRLINES FLIGHT 44 DEPARTED SAN FRANCISCO INTERNATIONAL AIRPORT, ENROUTE TO JFK. AT APPROXIMATELY 0930, JUST PRIOR TO AIRCRAFT ROTATION ON TAKE OFF THE CREW REPORTED THEY LOST BOTH AIRSPEED INDICATORS, BOTH ALTIMETERS, BOTH VERTICAL SPEED INDICATORS, BOTH FLIGHT DIRECTORS, AUTO THROTTLE, AUTO PRESSURIZATION 1 AND 2, BOTH EEC, RUDDER RATIO, MACH TRIM, TACAS, ALTITUDE REPORTING/AUDIO ALERT, REQUIRING THE USE OF STANDBY INSTRUMENTATION ONLY. THE AIRCRAFT RETURNED TO SFO, LANDING SAFELY WITHOUT INJURY TO CREW OR PASSENGERS. IT WAS DETERMINED, AFTER INSPECTION BY AMERICAN AIRLINES MAINTENANCE PERSONNEL, AT SAN FRANCISCO, THE FAILURE OF BOTH AIR DATA COMPUTERS WAS ATTRIBUTED TO THE UNITS NOT BEING SECURELY FASTENED IN THE AVIONICS COMPARTMENT RACK, CAUSING THE UNITS TO BECOME LOOSE, AND RENDERED INOPERABLE.