# SDR CALA2023081802570

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 15, 2023
- Submitted: August 18, 2023
- Operation: Air carrier
- Aircraft: [N36272](https://openairdocs.org/aircraft/N36272), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31590
- Aircraft time: 69,400 hours, 24,324 cycles
- System (JASC): [3600 · Pneumatic System](https://openairdocs.org/jasc/3600)
- Part: Unknown
- Part number: UNKNOWN
- Part serial: NA
- Condition: Unknown
- Location: Unknown
- Stage of operation: TO
- How discovered: O
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2023081802570

## Discrepancy

BLEED TRIP OFF LIGHT COMES ON DURING TAKEOFF LIGHT NO. 1 BLEED TRIP OFF DURING T/O. HAPPENED TWICE AT HIGH N1 ABOVE 90 PERCENT. CREW REPORTS BOTH ENGINE BLEEDS WERE CLOSED FOR HOT TAKEOFF -APU BLEED WAS ON ONLY. #1 ENGINE BLEED PRSOV LOCKED CLOSED IN REFERENCE TO MEL 3605A. FOUND PRSOV REF PRESSURE FLEX LINE FROM VALVE TO REGULATOR LEAKING, REF AMM 36-11-00-700-803. ACP HIGH POWER RUN ON ENGINES, BLEED PRESSURES WITHIN LIMITS AND NO BLEED TRIPS.

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