Service difficulty report · Transmitter · Boeing 7378

Difficulty date
April 28, 2023
Submitted
April 28, 2023
Operation
Air carrier
Aircraft
N24202
Make and model
Boeing 7378
Aircraft serial
30429
Aircraft time
71,865 hours, 26,024 cycles
Part
Transmitter
Part number
18173812
Part serial
2894
Condition
Inoperative
Location
Le Flap
Part time
56,108 hours, 20,195 cycles
Stage of operation
CR
How discovered
O
Nature of condition
F
Precautionary procedure
A

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

What was found

NO FLAP DEPLOYMENT ON APPROACH. NO LEADING EDGE FLAP TRANSIT LIGHT FLAP PRIMARY OR MOVEMENT OF FLAPS PER PROCEDURE 1. FIM POINTS TO WIRING/TRANSMITTER. RAN FLAPS IN PRIMARY AND ALTERNATE NO FLAP MOVEMENT. SLATS MOVED DURING ALTERNATE OPERATION. ALTERNATE FLAPS BRAKE AWAY WIRE BROKEN.PREFORMED BITE ON ON FSEU MX MSG 27-52259. FOLLOWED FIM TASK 27-51 TASK 813 REMOVED PLUG FROM INDICATOR AND RAN FLAPS NO TO ACCOMPLISHED TRANSMITTER INSTALLATION TEST, AND LAND VERIFY CHECK. PARTS USED: 29-2759-9-0004,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1892764 SN OFF 2894 FOUND FAULT TE FLAP SENSOR LEFT ON BITE CHECK. REF. FIM 27-51 RESECURED WIRE BUNDLE AND POSITIONED BUNDLE IN CLAMPS FOR TASK 813. REPLACED L/H FLAP TRANSMITTER REF. AMM 27-58-01. NO CLEARANCE WITH NO CHAFFING. SEE L/P 4430521 FOR WIRE REPAIR. HELP. UPON FURTHER TROUBLESHOOTING FOUND WIRE BUNDLE CHAFFED AT LEFT WING INBOARD GROUND SPOILER AFT OF OUTBOARD ACTUATOR. NEED TRANSMITTER, FL OFF 29-2759-9-0004 2894 ON 29-2759-9-0004 7255 PERFORMED FLAP POSITION SENSOR TESTS REF AMM. 27-58-01 WITH OPS CHECK GOOD. RESECURED BREAKAWAY WIRE ON ALTERNATE FLAPS SWITCH. RAN FLAPS WITH NO FAULTS FOUND. REF AMM. 27-58-01 SYSTEM REQUIRES CAT CHECK FLAGGED ITEM AS CAT.

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