# SDR SWAA970395

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N307SW](https://openairdocs.org/aircraft/N307SW), registered now
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 22947
- System (JASC): [8010 · Engine Cranking](https://openairdocs.org/jasc/8010)
- Part: Start Valve
- Part number: 32896302
- Condition: Malfunctioned
- Location: Nr 2 Engine
- Stage of operation: CR
- Nature of condition: O
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA970395

## Discrepancy

AT FL330, NR 2 ENGINE START VALVE OPEN LIGHT ILLUMINATED, UNABLE TO MAINTAIN CABIN PRESSURE.  DESCENDED TO 8,000 FT, START VALVE LIGHT EXTINGUISHED.  ON ANOTHER ATTEMPT TO USE NR 2 BLEED AT FL 290, SAME SCENARIO OCCURED.  DESCENDED TO FL 250, ALL OPERATED OK FOR REMAINDER OF FLIGHT.  INSPECTED AND REPLACED NR 2 ENGINE START VALVE AND PRESSURE CHECKED PER BOEING M/M.

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