Service difficulty report · Flap System · Boeing 7378H4

Difficulty date
April 19, 2025
Submitted
April 21, 2025
Operation
Air carrier
Aircraft
N8520Q
Make and model
Boeing 7378H4
Aircraft serial
42532
Aircraft time
27,403 hours, 13,688 cycles
Part
Flap System
Condition
Locked
Location
Zone 500
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

ON APPROACH; FLAP HANDLE WAS AT 15; FLAP TRAILING EDGE INDICATED LEFT 10; RIGHT TRAILING EDGE INDICATED 5. ON GO AROUND; BOTH TRAILING EDGE FLAPS INDICATED 10. QRH DIRECTED ALTERNATE FLAP (CONTINUED) USAGE TO FLAPS 15. NORMAL BRAKING USED. AUTO BRAKE 3. NORMAL PARK AT GATE RECEIVED FAULT CODES FLIGHT LEG 0: TE FLAP SNSR R 27-52260 L28VDC EXC INV 27-53279 E 28VAC EXC INV 27-53280 ASYM ENABLED 27-81283 FLIGHT LEG -75 FAULT CODES : ASYM ENABLED 27-81283 FLIGHT LEGN-110 FAULT CODES: ASYM ENABLED 27-81283<[01] AHM SHOWS RT FLAP POSITION TRANSMITTER FAILED. R & R RT FLAP POSITION TRANSMITTER REF AMM 27-58-01; R & R FLAP POSITION INDICATOR FOR COMPANY CONVENIENCE REF AMM 27-58-02; R & R FSEU FOR COMPANY CONVENIENCE REF AMM 27-51-01

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