# SDR AALA202607015686

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 30, 2026
- Submitted: July 2, 2026
- Operation: Air carrier
- Aircraft: [N931NN](https://openairdocs.org/aircraft/N931NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 33230
- Aircraft time: 38,312 hours, 16,667 cycles
- System (JASC): [2751 · Trailing Flap Position Indicating System](https://openairdocs.org/jasc/2751)
- Part: Sensor
- Condition: Inoperative
- Location: Zone 500 Flaps
- Stage of operation: DE
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202607015686

## Discrepancy

AIRCRAFT WAS GROUNDED: 210 KNOTS, DURING FLAP EXTENSION FROM 0 TO 1 A TRAINING EDGE FLAP ASYMMETRY OCCURRED AND THE FLAPS STOPPED MOVING. EMERGENCY WAS DECLARED AND AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED FLAP SKEW SENSOR-4 T528 IAW AMM 27-59-01 AND FIM 27-59-00.

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