# SDR USAA20091204SB158

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 3, 2009
- Submitted: December 4, 2009
- Operation: Air carrier
- Aircraft: N157AW
- Make and model: Boeing 737-3G7
- Registry model: [Boeing 737-3G7](https://openairdocs.org/model/boeing-737-3g7) (OpenAirDocs)
- Aircraft serial: 23779
- System (JASC): [2751 · Trailing Flap Position Indicating System](https://openairdocs.org/jasc/2751)
- Part: Transmitter
- Condition: Out Of Adjust
- Location: Te Flap
- Stage of operation: AP
- How discovered: O
- Nature of condition: F
- Precautionary procedure: L
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA20091204SB158

## Discrepancy

LAS - PILOT REPORTED A TRAILING EDGE SPLIT FLAP CONDITION WHEN SELECTING FLAPS 15 ON APPROACH (5 DEGREES ON ONE AND 7 DEGREES ON THE OTHER).  DURING GO-AROUND, WHEN GEAR WAS SELECTED UP, SPLIT FLAP CONDITION WENT AWAY AND A FLAPS 15 LANDING WAS CONDUCTED.  DURING TROUBLESHOOTING, MAINTENANCE NOTED THE LEFT TRAILING EDGE FLAP NEEDLE WAS LEADING RIGHT AND STOPPING AT EDGE OF WHITE BAND AT 5-10 UNITS.  PERFORMED ADJUSTMENT OF LEFT TRAILING EDGE FLAP POSITION TRANSMITTER PER MM 27-58-01.  OPERATIONAL CHECK GOOD AND POSITION INDICATORS MATCH THROUGHOUT OPERATIONAL RANGE.

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