# SDR UALA2011060902846

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 9, 2011
- Submitted: June 10, 2011
- Operation: Air carrier
- Aircraft: [N226UA](https://openairdocs.org/aircraft/N226UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30226
- Aircraft time: 38,886 hours, 4,753 cycles
- Engine: Pwa PW40903
- System (JASC): [2780 · Leading Edge Slat Control System](https://openairdocs.org/jasc/2780)
- Part: Warning System
- Condition: Malfunctioned
- Location: Flap/Slat Sys
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011060902846

## Discrepancy

FLAP-SLAT SKEW SENSORS FAILURE OF ONE OR MORE SLAT AND-OR FLAP SKEW DETECTION SENSORS.  LOSS OF SLAT AND-OR FLAP SKEW DETECTION SENSOR REDUNDANCY.  STATUSMSG-2720291 ACTIVE AP HARD.  DURING FLAP OPS FOUND L2A INDICATION ABNORMAL -005.  SUSPECT BAD L2A SKEW SENSOR.  IF NEED L2A SENSOR PCN 483- 2027.  PLZ ACP WIRE CHKS BY LOWERING FLAPS TO ACCESS SKEW SENSORS, SHAKEOUT WIRING WHILE OTHER TECH MONITORS FLT CONT MAINT PG READOUTS, THIS SHOULD LOCATE AREA OF SUSPECT WIRE ISSUE.

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