Service difficulty report · Pulley · Boeing 737824

Difficulty date
September 3, 2024
Submitted
September 6, 2024
Operation
Air carrier
Aircraft
N39297
Make and model
Boeing 737824
Aircraft serial
34003
Aircraft time
54,392 hours, 20,044 cycles
Part
Pulley
Part number
FL3C63FS428
Condition
Damaged
Location
Rh Wing
Stage of operation
DE
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

FLAPS WOULD NOT EXTEND BEYOND 15 DEGREES PER TOMC REQUEST, PERFORMED TRAILING EDGE FLAP LOAD RELIEF SYSTE M BITE TEST. ALL TEST PASSED NO FAULTS NOTED ON GROUND. CHK'D TORQUE INDICATORS, NONE POPPED. CYCLED FLAPS SEVERAL TIMES WITH ELEC PMPS. RAN 2 ENG AND CYCLED FLAPS SEVERAL TIMES. FOUND 7 AND 8 TRANSMISSION WITH VIBRATION DURING MOTION. ALSO, FOUND ALL FLAP TRANSMISSION JACKSCREWS DRY REQUIRING LUBRICATION. REMOVED 7 AND 8 CANOES FOR FURTHER INSPECTION. REF LP 9065983 REINSTALLED 7 AND 8 TE FLAP CANOES PER AMM 27-51-28. TEST FLIGHT TO BE PERFORMED REF LP 9150086. CARRIED BY ELB PERFORMED FIM 27-51 TASK 836 PAR F. INSPECTED ALL FLAP TRANSMISSION TORQUE TRIP INDICATORS NO POPPED INDICATORS NOTED. CHECKED AND SERVICED ALL FLAP TRANSMISSION TO FULL. PERFORMED ENGINE RUN AND CYCLED FLAPS TO FULL TRAVEL SEVERAL TIMES. RE-INSPECTED FLAP TRANSMISSION NO POPPED INDICATORS NOTED. PARTS USED: 00-0609-3-8167,QTY :1 00-0586-3-1099,QTY :1 INSP, CW PER AMM 27-51-21 AND GMM 9-25-05 LUBED LEFT AND RIGHT WING TRAIL EDGE FLAP SYS REF AMM 12-22-51. NOTICED VIBRATION ON THE RIGHT OUTBOARD TRAILING EDGE FLAP DURING EXTENSION AND RETRACTION OF FLAPS. FOUND RIGHT WING OUTBOARD DEFLECTION UPPER ROLLER WITH HIGH PRELOAD MAKING HIGH FRICTION VIBRATION ON DEFLECTION CONTROL TRACK. ADJUSTED OUTBOARD DEFLECTION CONTROL ROLLER ASSY REF AMM 27-51-21-820-801. OPS CK GOOD NO VIBRATION OR FAULTS NOTED. PARTS USED: 00-0609-3-7342,QTY 1 TEST FLIGHT TO BE PERFORMED.