# SDR SWAA2025041524456

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 13, 2025
- Submitted: April 15, 2025
- Operation: Air carrier
- Aircraft: [N949WN](https://openairdocs.org/aircraft/N949WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36663
- Aircraft time: 47,679 hours, 28,959 cycles
- System (JASC): [2750 · Trailing Edge Flap Control System](https://openairdocs.org/jasc/2750)
- 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
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2025041524456

## Discrepancy

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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