# SDR 2002F00378

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 26, 2002
- Submitted: April 15, 2002
- Operation: Air carrier
- Aircraft: [N528AT](https://openairdocs.org/aircraft/N528AT), registered now
- Make and model: Boeing 757-23N
- Registry model: [Boeing 757-23N](https://openairdocs.org/model/boeing-757-23n) (OpenAirDocs)
- Aircraft serial: 30887
- System (JASC): [3600 · Pneumatic System](https://openairdocs.org/jasc/3600)
- Part: Pilot Valve
- Part number: 10746016
- Condition: Inoperative
- Location: Lt Engine Pylon
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2002F00378

## Discrepancy

DURNG TAXI, LEFT DUCT PRESSURE FLUCTUATES.  AIRCRAFT RETURNED TO GATES.  MAINTENANCE REPLACED THE HIGH STAGE PILOT.  (M)

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