# SDR AALA2019100979030

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 6, 2019
- Submitted: October 9, 2019
- Operation: Air carrier
- Aircraft: [N886NN](https://openairdocs.org/aircraft/N886NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 33223
- Aircraft time: 24,324 hours, 9,855 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Cabin Pressure
- Condition: Unknown
- Stage of operation: CL
- 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/AALA2019100979030

## Discrepancy

AIRCRAFT WAS GROUNDED: FLIGHT AIR RETURNED TO IAH ON ACCOUNT OF PRESSURIZATION ISSUE. EMERGENCY WAS DECLARED. MAINTENANCE ACCOMPLISHED OPERATIONAL TEST AND LEAK TEST OF THE PRESSURIZATION SYSTEM IAW AMM 05-51-91, OPS AND LEAK TEST GOOD. ACCOMPLISHED OPS TEST OF THE CABIN OUTFLOW VALVE IAW AMM 21-31-03, OPS TEST GOOD. ACCOMPLISHED BITE TEST OF CPC IAW AMM 21-31-00, NO FAULTS FOUND. ACCOMPLISHED BITE TEST OF THE PACK/ZONE TEMPERATURE CONTROLLER IAW AMM 21-61-00, AIRCRAFT PTC BITE GOOD. AC RETURNED TO NORMAL CONFIG. AIRCRAFT OK FOR SERVICE. PERFORMED GVI OF CABIN OUTFLOW VALVE, NO DEFECT NOTED.

---
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.