# SDR ASAA0852448

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 2, 2008
- Submitted: January 3, 2008
- Operation: Air carrier
- Aircraft: [N577AS](https://openairdocs.org/aircraft/N577AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35186
- Aircraft time: 3,263 hours, 985 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Warning System
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: UK
- How discovered: O
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA0852448

## Discrepancy

UPON POWERING UP COLD PLANE ACFT PRESSURIZATION SYSTEM INDICATED AUTO FAIL & ALTN MODE.  WHEN TRANSFERRING FROM APU TO GROUND PWR AUTO FAIL & ALTN MODE FLASH ON AND GO OUT.  COMPLIED WITH FIM 21 31 TASK 801.  NO FAULTS FOUND.  AIRCRAFT OK FOR SERVICE.

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