# SDR ASAA2016041316391

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 13, 2016
- Submitted: April 15, 2016
- Operation: Air carrier
- Aircraft: [N708AS](https://openairdocs.org/aircraft/N708AS), registered now
- Make and model: Boeing 737490
- Aircraft serial: 28895
- Aircraft time: 51,760 hours, 29,064 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 7638103
- Part serial: 97047619
- Condition: Failed
- Location: Cabin Pressure
- Part time: 48,112 hours, 26,970 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016041316391

## Discrepancy

PROMPTLY AFTER LEVEL OFF AT FL 310 HEARD CABIN ALTITUDE WARNING HORN ACCOMPANIED BY VISUAL CABIN RED ANNUNCIATER LIGHT PERFORMED QRH CHECKLIST PROCEDURES & EXECUTED EMERGENCY DECENT TO 10000'.  CABIN STABILIZED IN STANDBY MODE AT 10000 REMAINED OF FLIGHT.  ACFT GROUNDED.  PERFORMED OPS TEST, PRESSURIZATION CONTROL SYS IAW AMM 21-31-00,  OPS CHECKS GOOD,  NO FAULTS FOUND.  R & R AUTO CABIN PRESSURE CONTROLLER FOR CONVENIENCE, PRECAUTION.  PERFORMED OPS TEST, PRESSURIZATION CONTROL SYS AFTER INSTALLING NEW AUTO PRESSURE CONTROLLER, NO FAULTS FOUND, REF AMM 21-31-00. PERFORMED AIRPLANE SINGLE PACK OPERATION, CONFIDENCE CHECK IAW AMM 21-00-05, NO FAULTS FOUND, ALL TESTS PASS.

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