# SDR AALA20160531013

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 30, 2016
- Submitted: May 31, 2016
- Operation: Air carrier
- Aircraft: [N9628W](https://openairdocs.org/aircraft/N9628W), registered now
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 53598
- Aircraft time: 49,779 hours, 24,234 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Unknown
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20160531013

## Discrepancy

AIRCRAFT WAS GNDED.  EMER DECLARED, LANDING UNEVENTFUL & ACFT NOT OVERWEIGHT.  DURING CRUISE FLIGHT CREW REPORTED A SURGE IN PRESSURIZATION, ACCOMPANIED BY A PRESSURIZATION FLOW ANNUNCIATION INDICATION.  EXPERIENCED INITIAL DIFFICULTY WITH MANUAL PRESSURIZATION.  EMER DESCENT INITIATED.  PERFORMED CABIN DECAY CHECK IAW AMM 21-00-00-501 WITH NO FAULTS.  INSPECTED PACK DUCTS WITH NO DEFECTS NOTED.  VERIFIED OUTFLOW VLV OPERATION.  PERFORMED BITE OF BOTH PRESSURIZATION CONTROLLERS IAW AMM 21-30-00 WITH NO FAULTS FOUND.  SYS CHECKED NORMAL.

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