Service difficulty report · Gearbox · Boeing 75733N

Difficulty date
July 9, 2024
Submitted
July 18, 2024
Operation
Air carrier
Aircraft
N57869
Make and model
Boeing 75733N
Aircraft serial
32593
Aircraft time
61,411 hours, 18,548 cycles
Part
Gearbox
Part number
251N42049
Part serial
65444
Condition
Failed
Location
Te Flap Sys
Stage of operation
AP
How discovered
O
Nature of condition
F, J
Precautionary procedure
O

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

What was found

TE FLAP DISSAGREE INDICATED F25 WITH HANDL E IN F30 POSS SDR FLAGGED FOR EMERGENCY LANDING CREW STATED SOME TIME AFTER TOUCHDOWN AND ARRIVING TO THE GATE FLAPS WENT DOWN TO 30 AND MESSAGE WENT AWAY. FOUND LEFT WING OUTBOARD FLAP OUTBOARD TRANSMISSION OVERLOAD INDICATOR TRIPPED. ALL OTHER TRANSMISSION FLUID AND TRIP INDICATORS ARE GOOD. RESET TRIPPED TRANSMISSION AS REQUIRED. REF FIM 27-51 FAULT TREE 808. REMOVED TEE GEARBOX FOR LEFT OUTBOARD FLAP PER AMM 27-51-18-024-001. READY FOR INSTALLATION. PERFORMED INSTALLATION OF TEE GEARBOX FOR LEFT OUTBOARD TE FLAP UP TO STEP F(11)(C) OF OPERATIONAL TEST. PLEASE CONTINUE FROM STEP F(12) OF OPERATIONAL TEST. REF AMM 27-51-18-424-019 PARTS USED: 1089205,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1089205 SN OFF 0869 GEARBOX, FLAP, OFF 19-2751-9-0023 0869 ON 19-2751-9-0023 0579 VERIFIED INSTALLATION OF TEE GEARBOX IN REF. TO AMM 27-51-18-424-019 UP TP STEP F ( 11 ) ( C ). QC237669. FILE NUMBER ADDED FOR GEAR BOX INSTALLATION. PARTS DATA INPUTED ON PREVIOUS ENTRY. CONTINUED FROM AMM 27-51-18-424-019, STEP F(12), OPS CHECK GOOD. NO FAULTS OR MESSAGES AT THIS TIME.

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