Service difficulty report · Transmitter · Boeing 7377H4

Difficulty date
April 13, 2025
Submitted
April 15, 2025
Operation
Air carrier
Aircraft
N949WN
Make and model
Boeing 7377H4
Aircraft serial
36663
Aircraft time
47,679 hours, 28,959 cycles
Part
Transmitter
Part number
18173812
Part serial
4000
Condition
Out Of Limits
Location
Zone 100
Stage of operation
AP
How discovered
C
Nature of condition
O
Precautionary procedure
K

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

What was found

ON APPROACH TRAILING EDGE STOPPED AT LESS THAN 5 DEGREES WITH A SLIGHT ASYMMETRY. PSEU LIGHT ILLUMINATED AFTER LANDING. <[01] SWAPPED LH & RH FLAP POSITION TRANSMITTERS FOR TROUBLESHOOTING IAW AMM 27-58-01. INITIAL RIG WAS GOOD. NO FIX. RE-CHECK OF RIG VALUES SHOW OUT OF LIMITS.; [02] F/C 27-52261 & 27-52259. R+R LH FLAP POSITION TRANSMITTER IAW AMM 27-58-01.INITIAL RIG WAS GOOD. NO FIX RE-CHECK OF RIG VALUES SHOW OUT OF LIMITS. OPS CHECK FAIL; [03] F/C 27-52259. SLAVED IN NEW FLAP POSITION INDICATOR IAW AMM 27-58-02. NO FIX; REINSTALLED ORIGINAL. SLAVED IN NEW FSEU IAW AMM 27-51-01. NO FIX; REINSTALLED ORIGINAL. OPS CHECK FAILED.; [04] PERFORMED ADJUSTMENT; TEST AND VERIFICATION OF LH FLAP POSITION TRANSMITTER PER AMM 27-58-01.;[ 05] R/R RH FLAP POSITION TRANSMITTER PER AMM 27-58-01.PERFORMED ADJUSTMENT; TEST AND VERIFICATION PER AMM 27-58-01.

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