# SDR UALA2012092405407

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 20, 2012
- Submitted: October 17, 2012
- Operation: Air carrier
- Aircraft: N535UA
- Make and model: Boeing 757222
- Aircraft serial: 25130
- Aircraft time: 70,395 hours, 25,906 cycles
- Engine: Pwa PW2037
- System (JASC): [3418 · Stall Warning System](https://openairdocs.org/jasc/3418)
- Part: Module
- Part number: 285T110423
- Part serial: D01715
- Condition: Failed
- Location: Stall Warning
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012092405407

## Discrepancy

STALL WARNING OPERATIONAL CHECK, FAILS STEP B.(17). WITH R AIR DATA AOA SENSOR C-B (11F31) PULLED AND F/O'S ALT INST SELECTED, 'WARN ELEX' MESSAGE STAYS ON EICAS & R STALL WARNING WILL NOT TEST.   REPLACED STALL WARNING MODULE M938 AND CHECKED OKAY.

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