American B772 near Buenos Aires on Oct 3rd 2014, unexpected pilot seat movement injures 17
Last Update: October 2, 2016 / 22:00:48 GMT/Zulu time
Incident Facts
Date of incident
Oct 3, 2014
Classification
Accident
Airline
American Airlines
Flight number
AA-953
Departure
New York JFK, United States
Destination
Buenos Aires, Argentina
Aircraft Registration
N772AN
Aircraft Type
Boeing 777-200
ICAO Type Designator
B772
Airport ICAO Code
SAEZ
Argentina's JIAAC reported on Mar 11th 2015, that one occupant received serious injuries, 17 others minor injuries. The occurrence was rated an accident, the JIAAC is investigating.
On Oct 2nd 2016 the JIAAC released their final report in Spanish concluding the probable causes of the accident were:
The steep dive from FL300 about 130nm from Ezeiza VOR was caused by the inadvertent interference with the flight controls by the first officer causing the autopilot to disconnect when the first officer's seat moved.
There was moderate turbulence in the area not reported by preceding flights.
There was no standard operating procedure for changing the position of flight crew in flight.
The JIAAC reported the aircraft had just been cleared to descend from FL300 to FL270 when the aircraft entered a steep dive, the captain took control of the aircraft and arrested the descent. He subsequently assessed the situation, received information that a number of cabin crew and passengers were injured and requested priority for landing.
The JIAAC analysed that the actual fault in the first officer's seat motion system could not be determined because the aircraft did not return to Argentina for verification.
Metars:
SAEZ 031700Z 07014KT 7000 -RA SCT018 OVC090 15/10 Q1027 RETS=
SAEZ 031613Z 07016G26KT 8000 -TSRA FEW048CB OVC090 16/09 Q1027=
COR SAEZ 031612Z 07016G26KT 8000 -TSRA FEW048CB OVC090 16/09 Q1027=
SAEZ 031600Z 06016KT 9999 FEW030 OVC100 16/09 Q1028=
COR SAEZ 031500Z 07020KT CAVOK 16/08 Q1028=
SAEZ 031400Z 07018KT 040V100 CAVOK 15/08 Q1028=
SAEZ 031300Z 07020KT CAVOK 15/08 Q1028=
SAEZ 031200Z 07023KT CAVOK 15/08 Q1028=
SAEZ 031100Z 07020G32KT CAVOK 14/07 Q1029=
SAEZ 031000Z 07018G31KT CAVOK 14/07 Q1028=
SAEZ 030900Z 06018G29KT 9999 FEW020 OVC080 14/08 Q1028=
SAEZ 030800Z 07018KT 9999 -RA FEW020 BKN080 14/08 Q1027=
Aircraft Registration Data
Incident Facts
Date of incident
Oct 3, 2014
Classification
Accident
Airline
American Airlines
Flight number
AA-953
Departure
New York JFK, United States
Destination
Buenos Aires, Argentina
Aircraft Registration
N772AN
Aircraft Type
Boeing 777-200
ICAO Type Designator
B772
Airport ICAO Code
SAEZ
This article is published under license from Avherald.com. © of text by Avherald.com.
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