# SDR CALA2023070502175

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 3, 2023
- Submitted: July 5, 2023
- Operation: Air carrier
- Aircraft: [N15712](https://openairdocs.org/aircraft/N15712), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28783
- Aircraft time: 76,752 hours, 26,781 cycles
- System (JASC): [7500 · Engine Bleed Air System](https://openairdocs.org/jasc/7500)
- Part: Line
- Part number: UNKNOWN
- Condition: Broken
- Location: Bleed Air
- Stage of operation: CR
- 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/CALA2023070502175

## Discrepancy

AT FL370 CABIN ALT  WARNING LIGHT CAME ON AND CABIN PRESSURE REACHED 10000 IN AUTO. CARRIED BY ELB FOUND BLEED AIR LINE TO PRECOOLER CONTROL VALVE BROKE. REPLACED LINE REF AMM 36-12-02. PERFORMED ENGINE RUN SYSTEM OPS CHECK GOOD.

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