# SDR WX0A2014082272111

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 14, 2014
- Submitted: August 22, 2014
- Operation: Air carrier
- Aircraft: N402NV
- Make and model: Doug MD-88
- Registry model: [Doug MD-88](https://openairdocs.org/model/mcdonnell-douglas-md-88) (OpenAirDocs)
- Aircraft serial: 49763
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Flex Coupling
- Condition: Out Of Position
- Location: Ac Bay
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/WX0A2014082272111

## Discrepancy

ON CLIMB OUT AT 12-15, NOTED FLOW LIGHT & CLIMBING CABIN.  UNABLE TO MAINTAIN CABIN PRESS.  BOTH PRESS CONT INOPERATIVE, UNPRESSURIZED FLT.  REF LP 515938 RT PACK ON MEL 21-08 SIT 2, CONTROL 10838, RT PACK MEL CLEARED ON LP 515943.  FLEX COUPLING OFF BETWEEN LT ACM COMPRESSOR & PRIMARY HEAT EXCHANGER.  INSPECTED ACM FOR DAMAGE, NONE NOTED.  INSTALLED FLEX COUPLING & NEW CLAMP.  OPERATIONS TESTED OF LT PACK SYS GOOD IAW AMM 21-51-01.  PRESSURIZED ACFT IAW TASK CARD FO443601.  OPERATIONS CHECKED GOOD.  PERFORMED BIT TEST OF PRESS CONTROLLERS IAW AMM 21-32-03.  FAULT SHOWS ACFT MOTOR.  R & R OUTFLOW VLV ACTUATOR.  OPERATIONS CHECK & BIT CHECKED GOOD IAW AMM 21-32-05.

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