# SDR IPXA2015072291416

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 17, 2015
- Submitted: July 22, 2015
- Operation: Air carrier
- Aircraft: [N580UP](https://openairdocs.org/aircraft/N580UP), registered now
- Make and model: Boeing 747428F
- Aircraft serial: 25632
- Aircraft time: 89,558 hours, 15,627 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Controller
- Condition: Inoperative
- Location: Bleed Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: J
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2015072291416

## Discrepancy

DIVERSION, RECEIVED BLEED 1 ADVISORY EICAS MSG AND BLEED OVERPRESS 1 STATUS LVL MESSAGE.  FOUND CMC FAULT MSG 36226, PRV & CONTROLLER FAIL. R & R WITH NEW PRV & CONTROLLER IAW AMM 36-11-13 & 36-11-20.  THEN OPS TEST OF NR 1 ENGINE PRV WITH ENGINE IDLE RUN .  WORKS NORMALLY.  LEAK CHECKS OK.  OK FOR SVC PRV ON /OFF PN:802170-12, SN OFF:2008060601. ON SN:2008031114. CONTROLLER ON/OFF, PN:792755-15.

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