# SDR AALA202101059007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 2, 2021
- Submitted: January 5, 2021
- Operation: Air carrier
- Aircraft: [N990AN](https://openairdocs.org/aircraft/N990AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29563
- Aircraft time: 34,956 hours, 14,023 cycles
- System (JASC): [2741 · Stabilizer Position Indicating](https://openairdocs.org/jasc/2741)
- Part: Position Switch
- Condition: Out Of Position
- Location: Zone 200 - Fuse
- Stage of operation: TO
- How discovered: O
- Nature of condition: W
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202101059007

## Discrepancy

AIRCRAFT WAS GROUNDED.  AT BOS, CREW REJECTED TAKEOFF AT 90 KNOTS DUE TO FEEL DIFFERENTIAL WARNING LIGHT ILLUMINATED.  AIRCRAFT RETURNED TO GATE.  FLIGHT CONTROL SWITCH A FOUND IN OFF POSITION WITH GUARD DOWN COVERING SWITCH.  SYSTEM TESTS NORMAL, PER FIM 27-31-00-810-815.

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