# SDR ASAA2013042994653

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2013
- Submitted: May 1, 2013
- Operation: Air carrier
- Aircraft: [N597AS](https://openairdocs.org/aircraft/N597AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35689
- Aircraft time: 19,290 hours, 6,054 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Regulator
- Part number: 1074926
- Part serial: 6585
- Condition: Failed
- Location: Nr 1 Engine
- Part time: 41,629 hours, 17,255 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2013042994653

## Discrepancy

WITH APU  BLEED OFF AND ISOLATION VALVE CLOSED LT DUCT PRESS WAS STILL INDICATED.  ACFT GROUNDED.  REPLACED NR 1 ENG PRSOV AND BLEED AIR REGULATOR IAW AMM 36-11-03 AND 36-11-04.  ACCOMPLISHED LEAK CKS FOUND OK.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.