# SDR 2003UALA00712

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 26, 2003
- Submitted: September 30, 2003
- Operation: Air carrier
- Aircraft: N336UA
- Make and model: Boeing 737322
- Aircraft serial: 24240
- Aircraft time: 45,030 hours, 24,773 cycles
- Engine: Ge CFM56*
- System (JASC): [3620 · Pneumatic Indicating System](https://openairdocs.org/jasc/3620)
- Part: Warning Light
- Condition: Illuminated
- Location: Cockpit
- Stage of operation: CL
- 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/2003UALA00712

## Discrepancy

ON CLIMB OUT OF OMA CREW GOT BLEED TRIP OFF LIGHTS & ANOTHER WING BODY OVERHEAT INDICATION.  CAUSED BY FAILURE OF PRE-COOLER PNEUMATIC VALVE DUE TO PLUGGED ORIFICE. REPLACED PRE-COOLER VALVE. HIGH STAGE VALVE AND PRECOOLER VALVE SENSOR WERE REPLACED AS A PRECAUTIONARY MEASURE. RAN ENGINE AND OPERATIONAL CHECK OF THE SYSTEM TESTED NORMAL.

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