# SDR SWAA2015040638100

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 1, 2015
- Submitted: April 6, 2015
- Operation: Air carrier
- Aircraft: N636WN
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 27709
- Aircraft time: 59,655 hours, 47,208 cycles
- System (JASC): [2710 · Aileron Control System](https://openairdocs.org/jasc/2710)
- Part: Control Unit
- Part number: 654476122
- Part serial: 12472A
- Condition: Faulty
- Location: Aileron
- Stage of operation: UK
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2015040638100

## Discrepancy

DIVERSION, SYS A ENG DRIVEN HYDRAULIC PUMP LOW PRESS LIGHT ILLUMINATED SYS A HYD QTY STABILIZED AT 1/4 FOR A LONG PERIOD THEN SLOWLY DECREASED TO NEAR ZERO.  R & R A AILERON & ELEVATOR POWER CONTROL UNIT IAW MM.

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