# SDR MZZA97318

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 18, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N83428
- Make and model: Boeing 727-2F9
- Registry model: [Boeing 727-2F9](https://openairdocs.org/model/boeing-727-2f9) (OpenAirDocs)
- Aircraft serial: 21426
- System (JASC): [2917 · Hydraulic Pressure Regulator, Main](https://openairdocs.org/jasc/2917)
- Part: Pressure Reg
- Part number: 3141602
- Condition: Inoperative
- Location: A Hyd System
- Stage of operation: CR
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MZZA97318

## Discrepancy

GUM - FLT 0862 - L/P 7957135 - A-SYSTEM HYDRAULIC PRESSURE IS ZERO.  CREW COMPLETED A-SYSTEM CHECK LIST/PROCEDURES.  MAINTENANCE TROUBLESHOT SYSTEM AND FOUND AIR PRESSURE REGULATOR AT FAULT.  REMOVED AND REPLACED A-SYSTEM AIR REGULATOR PER MM 29-11-12.  OPS CHECK NORMAL AND RELEASED AIRCRAFT FOR SERVICE.  (X)

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