# SDR ASAA2012122493535

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 24, 2012
- Submitted: December 26, 2012
- Operation: Air carrier
- Aircraft: [N563AS](https://openairdocs.org/aircraft/N563AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35180
- Aircraft time: 23,549 hours, 7,330 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Shutoff Valve
- Part number: 32145525
- Part serial: 4409
- Condition: Failed
- Location: Nr 1 Engine
- Part time: 51,231 hours, 24,404 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2012122493535

## Discrepancy

LEFT DUCT PRESSURE BELOW 18 PSI (AT 16PSI) WITH IDLE POWER DURING HIGH STAGE CROSSOVER CHK.  ACFT GROUNDED. R & R NR 1 ENG PRSOV AND LEAK AND OPS CHECKED GOOD IAW MM 36-11-04 ACP ENG BLEED AIR CROSSOVER OPS TEST IAW MM 36-11-00 TEST GOOD.

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