Service difficulty report · Transmission · Boeing 757224

Difficulty date
December 27, 2024
Submitted
December 30, 2024
Operation
Air carrier
Aircraft
N19117
Make and model
Boeing 757224
Aircraft serial
27559
Aircraft time
108,651 hours, 23,052 cycles
Part
Transmission
Part number
251N402235
Part serial
1260
Condition
Faulted
Location
Zone 600 Flap
Part time
96,211 hours, 20,374 cycles
Stage of operation
CR
How discovered
O
Nature of condition
F
Precautionary procedure
O

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

What was found

TE FLAPS DISAGREE EICAS COMPLIED WITH FLIGHT MAN PROCEDURE NORMA L LDG DURING INSPECTION, FOUND #5 FLAP TRANSMISSION OVERLOAD INDICATOR POPPED. SEE PIC. FOUND SCREW ASSY OF #5 FLAP TRANSMISSION CORRODED AND BURRS CAN BE FELT ON THREADS OF SCREW ASSY. FOUND BALL BEARINGS HAVE FALLEN OUT OF AFT GYMBAL OF #5 TRANSMISSION SCREW ASSY REMOVED #5 FLAP TRANSMISSION, JACK SCREW, AND GIMBAL AMM REF 27-51-06-024-001, 27-51-11-024-001 VERIFIED R/H INBOARD FLAP I/B TRANSMISION ASSY. REPLACED RIGHT INBOARD FLAP I/B FLAP TRANSMISSION, JACK SCREW, AND GIMBAL REF. AMM 27-51-06-424-021, 27-51-11-424-020. ALL TEST PASSED. NO FAULTS ON FSEU OR ON EICAS. INSPECTED AND VERIFIED COMPLETED INSTALLED