# SDR AALA20170819005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 19, 2017
- Submitted: August 23, 2017
- Operation: Air carrier
- Aircraft: N7528A
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49920
- Aircraft time: 76,516 hours, 40,616 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 21171802
- Part serial: 16923
- Condition: Faulty
- Location: Cabin Pressure
- Part time: 127,295 hours, 68,204 cycles
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A, B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20170819005

## Discrepancy

EMERGENCY DECLARED.  FLIGHT DIVERTED DUE TO A PRESSURIZATION PROBLEM.  AFTER RAPID DESCENT,  INDICATIONS RETURNED TO NORMAL AND EMERGENCY WAS CANCELLED.  MASKS DID NOT DEPLOY.  LANDING UNEVENTFUL.  REMOVED AND REPLACED THE NR 2 CABIN PRESSURIZATION CONTROLLER IAW AMM 21-30-00.  OPERATIONAL CHECKED GOOD.  AIRCRAFT WAS GROUNDED.

---
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.