Service difficulty report · Transmitter · Boeing 737824

Difficulty date
November 23, 2025
Submitted
November 26, 2025
Operation
Air carrier
Aircraft
N76515
Make and model
Boeing 737824
Aircraft serial
31623
Aircraft time
54,509 hours, 19,763 cycles
Part
Transmitter
Part number
18173812
Part serial
14599
Condition
Faulted
Location
Flap Sys
Part time
74,340 hours, 29,091 cycles
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 FLAPS DISAGREE. EXTENDED TO FLAPS 1 AND FLAPS STOPPED EXTENDING HALFWAY BETWEEN UP AND FLAPS 1. LE FLAPS TRANSIT LIGHT ILLUMINATED. ALTERNATE FLAPS EXTENSION USED TO EXTEND FLAPS TO 15. AS FLAP INDICATOR MOVED FROM FLAPS 10 TO 15 LE FLAPS EXT GREEN LIGHT ILLUMINATED. LANDED AT 166 KNOTS AND AUTOBRAKES 3. THE LANDING WAS SOFT AND UNEVENTFUL. PER FIM 27-51 TASK 836, PERFORMED BITE CHECK OF FSEU, FOUND TE FLAP SNSR L AND TE FLAPS SNSR DIS. RAN FLAPS ON HYDRAULICS AND CYCLED POSITION MULTIPLE TIMES. FLIGHT DECK FLAP INDICATION HAD THE RIGHT SIDE MOVE SMOOTHLY AND LEFT SIDE JUMPED MULTIPLE TIMES IN BOTH DIRECTION. FROM THE EXTERIOR THE FLAPS MOVED SMOOTHLY IN BOTH DIRECTIONS. REF: ALL SKEW SENSORS LOOK GOOD PER REPORT. TOMC REQUEST R&R OF THE LT FLAP TRANSMITTER IAW AMM 27-58-01/401. R & R THE LT FLAP TRANSMITTER T427 IAW AMM 27-58-01-400-801 UP TO STEP H. COMPLETED FROM STEP H TO THE END WITH NORMAL RESULTS. IAW AMM 27-58-01/401. FLAGGED FOR LAND VERIFY TEST.