# SDR UALA2011012000343

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 20, 2011
- Submitted: January 26, 2011
- Operation: Air carrier
- Aircraft: N552UA
- Make and model: Boeing 757222
- Aircraft serial: 26641
- Aircraft time: 72,553 hours, 20,894 cycles
- Engine: Pwa PW2040
- System (JASC): [2761 · Drag Control Actuator](https://openairdocs.org/jasc/2761)
- Part: O-Ring
- Condition: Leaking
- Location: Spoiler Actuator
- Stage of operation: NR
- How discovered: 9
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011012000343

## Discrepancy

L/E SLATS WILL NOT REACTIVATE.  FOUND NR1 SPOILER POWER CONTROL ACTUATOR LEAKING HYD FLUIDS.  REPLACED LEAKING O-RING ON ACTUATOR PLUG-BLEEDER.  L/E SLAT BYPASS VALVE RED LEVER WHEN MOVED OUT OF POSITION (2) DOES NOT RETURN ELECTRICALLY TO ORIGINAL POSITION. REPLACED VALVE ASSY IAW MM, CHECKS GOOD.

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