# SDR 97UAL900874

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 14, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N7273U
- Make and model: Boeing 727222
- Aircraft serial: 21420
- Engine: Pwa JT8D15
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Pneumatic Syst
- Condition: Malfunctioned
- Location: Apu
- Stage of operation: IN
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97UAL900874

## Discrepancy

DUCT PRESSURE DROPPED FROM 32 TO 6 PSI ON APU START.  NO ROTATION.  APU PNEUMATIC SYSTEM INOPERATIVE.  *S/D*  APU OPERATED NORMALLY WITH NO PNEUMATIC PROBLEMS.

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