Service difficulty report · Computer · Boeing 757222

Difficulty date
March 11, 2011
Submitted
March 11, 2011
Operation
Air carrier
Aircraft
N575UA
Make and model
Boeing 757222
Aircraft serial
26689
Aircraft time
60,578 hours, 22,479 cycles
Engine
Pwa PW2037
Part
Computer
Part number
S251T2205
Part serial
73
Condition
Faulted
Location
Nr 1
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

CREW REPORTED ELEVATOR FORCES ABNORMALLY HEAVY. RT SYSTEM ELEV PCA AT LT ELEVATOR (OTBD) IS LEAKING AT ROD END. OPERATED AILERONS. NO LEAKS NOTED. SUSPECT COLD SOAK LEAK. UNABLE TO DETERMINE IF LEAK IS FROM LT INBD OR LT OTBD PCA DUE TO RESIDUAL HYD FLUID MIGRATED TO MOST OF COMPARTMENT. REPLACED RT SYSTEM LEFT ELEVATOR PCA PER MM. ELEVATOR FEEL COMPUTER LEAKING AT CENTER MATING SURFACE. REMOVED & REPLACED ELEVATOR FEEL COMPUTER. REPLACED ELEVATOR FEEL ACTUATOR PER MM. FAILED TEST. ACCOMPLISH NEUTRAL SHIFT OVERRIDE MECHANISM TEST AND FEEL UNIT OVERRIDE TEST PER MM. COMPLETED TEST DOWN TO PARA P. TESTED NORMAL.