# SDR DALA2017010500086

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 5, 2017
- Submitted: January 5, 2017
- Operation: Air carrier
- Aircraft: N911DL
- Make and model: Doug MD-88
- Registry model: [Doug MD-88](https://openairdocs.org/model/mcdonnell-douglas-md-88) (OpenAirDocs)
- Aircraft serial: 49542
- Aircraft time: 74,876 hours, 57,901 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Pushrod
- Condition: Out Of Adjust
- Location: Cabin Pressure
- 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/DALA2017010500086

## Discrepancy

BOTH AUTOMATIC CABIN PRESSURIZATION SYSTEMS FAILED AFTER TAKE-OFF. RETURNED TO DEPARTURE.   PERFORMED BITE ON BOTH AUTO PRESSURE CONTROLLERS IAW AMM 21-32. BOTH HAVE AN AC MOTOR FAULT. FOUND INTERMITTENT AUTO PRESSURE INOPERATIVE, 1 AND 2 WHEN NOZZLE VALVE REACHES FULLY CLOSED POSITION. FOUND NOZZLE VALVE CAME TO STOP BEFORE ACTUATOR REACHED THE STOP POSITION. ADJUSTED NOZZLE VALVE PUSH ROD. OPS CHECKED GOOD.

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