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Cases › ATL02IA155 · Part 121 airline

McDonnell Douglas DC-10-10FedEx

Tampa, FL, USA · 2002-08-10·N388FE

0
fatal
0
serious
No injury
highest injury
Minor
damage
Replay the flight data401 samples · 22 parameters01:47:55.0 – 01:54:35.0Replay the flight data101 samples · 22 parameters01:52:05.0 – 01:53:45.0Replay the flight data401 samples · 10 parameters01:47:55.0 – 01:54:35.0Replay the flight data101 samples · 10 parameters01:52:05.0 – 01:53:45.0AnalyseThe analystOne timeline · precedents · ask the docket · what the record saysGenerateInvestigation briefFacts, cause, recorder extremes, sequence, sourcesSourceNTSB docket15 documents on data.ntsb.gov

What happened

NTSB summary, verbatim

The captain lowered the landing gear on base leg and heard a loud bang followed by the airplane shuddering. An emergency was declared and the flight crew conducted the emergency abnormal procedures. A forced landing was made to the destination airport and all main landing gear tires blew out. The flight crew completed an emergency shutdown and evacuated the airplane with out further incident. Examination of the airplane revealed a failure of the left hand main landing gear retract cylinder support frame due to fatigue, the breaking of the hydraulic lines attached to the retract cylinder, dumping of hydraulic fluid overboard, and the deactivation of the antiskid system.

Probable cause

the Board's determination
The failure of the left main landing gear retract cylinder support frame due to fatigue.

Sequence of events

1 timed eventsfrom the FDR factual report · claude-fable-5-1 (in-session)
  1. approach and landing (plots II-1 to II-8)approach/landingp.2
    Eight plots of the hydraulic-failure approach and the landing with eight blown tires; parameters include autopilots, ailerons, elevators, flaps/slats, stabilizer, rudders, glideslope/localizer, engine N1, thrust reversers, radio altitude and accelerations; no narrative values in the text

NTSB analysis

from the final report

The captain lowered the landing gear on base leg and heard a loud bang followed by the airplane shuddering. An emergency was declared and the flight crew conducted the emergency abnormal procedures. A forced landing was made to the destination airport and all main landing gear tires blew out. The flight crew completed an emergency shutdown and evacuated the airplane with out further incident. Examination of the airplane revealed a failure of the left hand main landing gear retract cylinder support frame due to fatigue, the breaking of the hydraulic lines attached to the retract cylinder, dumping of hydraulic fluid overboard, and the deactivation of the antiskid system.