# SDR ASAA12511249

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 15, 2012
- Submitted: March 19, 2012
- Operation: Air carrier
- Aircraft: [N577AS](https://openairdocs.org/aircraft/N577AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35186
- Aircraft time: 18,870 hours, 5,748 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 71211997101AC
- Part serial: 0795847
- Condition: Faulty
- Location: E&E Bay
- Part time: 18,870 hours, 5,748 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA12511249

## Discrepancy

CABIN PRESSURE AUTO FAIL LT ILLUMINATED ALTN MODE LT ILLUMINATED CABIN PRESSURE NORMAL.  VERIFIED DEFECT.  NR 2 CPC EXISTING FAULT SHOWS CONTRLR LRU FAIL.  REMOVED AND REPLACED NR 2 CPC REF MM 21 31 01.  OPS CHECK NORMAL.

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