Service difficulty report · Transmitter · Boeing 7378H4

Difficulty date
June 22, 2025
Submitted
June 24, 2025
Operation
Air carrier
Aircraft
N8684F
Make and model
Boeing 7378H4
Aircraft serial
36653
Aircraft time
30,463 hours, 15,135 cycles
Part
Transmitter
Condition
Inoperative
Location
Te Flaps
Stage of operation
AP
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

TRAILING EDGE FLAP /DISAGREE /ASYMMETRY TRAILING EDGE FLAP DISAGREE / ASYMMETRY <1<[01] ALT FLAP SWITCH USED SWITCH TO DRIVE FLAPS DOWN ;SWITCH IN COCKPIT NOT SAFTY WIRED;[02] CREW REPORTS PSEU LIGHT ILLUMINATED ON LANDING ( FAULT CODES 32-62009;32-62010) ON APPROACH CREW SELECTED 5 . FLAPS ;CREW OBSERVED FLAP SPLIT;FOLLOWED QRH AND USED ALT FLAP SWITCH TO DRIVE FLAPS DOWN; (FLAP HANDLE IN UP POSTION SLATS IN @ 2 DEGREES );[03] FSEU BITE CURRENT LEG FAULT CODE 27-52259. INITIAL EVAL FOUND #5 FLAP TRANSMISSION TORQUE INDICATOR POPPED AS WELL AS ALL FLAP BALLSCREWS AND U-JOINTS DRY. DRAINED AND SERVICED ALL T/E FLAP TRANSMISSIONS EXCLUDING #8 IAW AMM 12-22-51. NOTED #2 FLAP TRANSMISSION FLUID CLOUDY AND OVER SERVICED. T/E FLAP DRIVE UNIT ALSO DRAINED AND SERVICED IAW AMM 12-22-51. LUBED FLAP BALLSCREWS AND U-JOINTS AS WELL AS FLAP ROLLERS AND LINKAGES IAW AMM 12-22-51. FLAP SYSTEM OPS CHECKS NORMAL IAW 27-51-00. FLAP POSITION VERIFICATION THROUGH ACMS CHECKS NORMAL WITH MARGIN SPLITS STAYING ABOVE 7.3 IAW AMM 27-58-01.;[04] DRAINED AND SERVICED #8 FLAP TRANSMISSION IAW AMM 12-22-51 LEAK CHECK GOOD;[05] ACCOMPLISHED FIM 27-51 TASK 813. LUBRICATED ALL 8 FLAP BALL <BR>SCREWS AND U-JOINTS REF AMM 12-22-51. DRAINED AND SERVICED <BR>ALL 8 FLAP TRANSMISSIONS REF AMM 12-22-51. PER MOC REQUEST REMOVED AND REPLACED LEFT FLAP POSITION TRANSMITTER IAW AMM<BR>27-58-01 AND FLAP POSITION INDICATOR IAW AMM 27-58-02.

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