# SDR 1290503

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 26, 2005
- Submitted: August 16, 2005
- Operation: Air carrier
- Aircraft: [N129QS](https://openairdocs.org/aircraft/N129QS), registered now
- Make and model: Boeing 737-7BC
- Registry model: [Boeing 737-7BC](https://openairdocs.org/model/boeing-737-7bc) (OpenAirDocs)
- Aircraft serial: 30329
- System (JASC): [2751 · Trailing Flap Position Indicating System](https://openairdocs.org/jasc/2751)
- Part: Transmitter
- Part number: 18173810
- Part serial: 0879
- Condition: Intermittent
- Location: Te Flaps
- Part time: 2,756 hours, 1,029 cycles
- Stage of operation: LD
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/1290503

## Discrepancy

FLAP POSITION DISAGREE WITH FLAP HANDLE.  RT FLAP 0 DEGREES, LT FLAP 5 DEGREES.  BECAUSE OF SKEW INDICATION THE FLAP SYSTEM WOULD NOT EXTEND.  CREW MADE AN UNEVENTFUL -0- FLAP LANDING.  PERFORMED FSEU BITE AND OBSERVED CODE 27-52259 LT FLAP TRANSMITTER SWITCH P/N 18-1738-10 IS FAULTY.  REPLACED LT & RT FLAP TRANSMITTER SWITCHES WITH NEW SWITCHES THAT COMPLY WITH HONEYWELL SERVICE LETTER SL 18-1738-10.  BOEING FLEET TEAM DIGEST 737NG-FTD-27_03004 TITLED TRAILING EDGE FLAP POSITION TRANSMITTERS - INCREASED SYNCHRO BEARING FRICTION ADDRESSES THIS ISSUE.

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