# SDR AALA20161212003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2016
- Submitted: December 12, 2016
- Operation: Air carrier
- Aircraft: [N920AN](https://openairdocs.org/aircraft/N920AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29521
- Aircraft time: 51,226 hours, 20,621 cycles
- System (JASC): [2751 · Trailing Flap Position Indicating System](https://openairdocs.org/jasc/2751)
- Part: Transmitter
- Part number: 18173810
- Condition: Faulty
- Location: Te Flaps
- Stage of operation: LD
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20161212003

## Discrepancy

TRAILING EDGE FLAP ASYMMETRY INDICATION.  FLAPS LOCKED OUT AT 1 DEGREE.  EMERGENCY DECLARED. LANDED WITHOUT INCIDENT.  AIRCRAFT WAS GROUNDED.  REMOVED AND REPLACED FLAP SLAT ELECTRONIC UNIT IAW AMM 27-51-01 AND LEFT FLAP POSITION TRANSMITTER IAW AMM 27-58-01.  OPS CHECKED GOOD.

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