# SDR AALA202104079007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 6, 2021
- Submitted: April 7, 2021
- Operation: Air carrier
- Aircraft: [N878NN](https://openairdocs.org/aircraft/N878NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 40768
- Aircraft time: 28,132 hours, 11,609 cycles
- System (JASC): [2751 · Trailing Flap Position Indicating System](https://openairdocs.org/jasc/2751)
- Part: Transmitter
- Condition: Inoperative
- Location: Lt Wing Te Flaps
- Stage of operation: AP
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202104079007

## Discrepancy

AIRCRAFT WAS GROUNDED: ON APPROACH, FLAPS SELECTED TO "1" BUT GOT STUCK HALFWAY BETWEEN 0 AND 1. "TRAILING EDGE FLAP DISAGREE" CHECKLIST ACCOMPLISHED. USED ALTERNATE FLAP EXTENSION WITH A FLAPS 15 LANDING. EMERGENCY DECLARED. REMOVED AND REPLACED LEFT POSITION TRANSMITTER PER AMM 27-58-01.

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