# SDR ASAA2014060107997

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 1, 2014
- Submitted: June 3, 2014
- Operation: Air carrier
- Aircraft: [N577AS](https://openairdocs.org/aircraft/N577AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35186
- Aircraft time: 27,466 hours, 8,238 cycles
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Warning Light
- Condition: Illuminated
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2014060107997

## Discrepancy

DURING PRELIGHT, FOUND "AUTO FAIL" AND "ALTN" LIGHTS ILLUMINATED ON PRESSURIZATION PANEL W/ MODE SELECTOR SWITCH TO AUTO POSITION.  ACFT GROUNDED.  NR 1 CABIN PRESSURE CONTROLLER HAD LRU FAULT, RAN NR 1 CABIN PRESSURE SYS GROUND TEST IAW AMM 21-31-00-700-802, NO FAULTS AND INITIAL FAULT DID NOT RETURN.  SUSPECT INTERMITTENT SOFTWARE FAULT.  RESET SYS AND REPEATED TEST AND ONCE AGAIN, NO FAULTS.  COMPUTER HAD NO RECORDED FAULTS AND THERE WERE NO FAULTS LAST 30 DAYS IN TRAX HISTORY. GROUND FUNCTIONAL TEST GOOD IAW AMM 21-31-00-700-802, ACFT READY FOR CONTINUED SERVICE.

---
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.