# SDR DLM88020419

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 8, 2002
- Submitted: April 23, 2002
- Operation: Air carrier
- Aircraft: N951DL
- Make and model: Doug MD-88
- Registry model: [Doug MD-88](https://openairdocs.org/model/mcdonnell-douglas-md-88) (OpenAirDocs)
- Aircraft serial: 49882
- Aircraft time: 33,813 hours, 26,862 cycles
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Check Valve
- Part number: 17101912
- Condition: Sticking
- Location: A/C Bay
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DLM88020419

## Discrepancy

AFTER T/O FROM CVG, PASSING THROUGH APPROX 11K AFT FLT ATT REPORTED ABNORMALLY HIGH PITCHED NOISE COMING FROM TAIL CONE AREA AND REPORTED FLUID LEAKING FROM O/H TAIL CONE.  RETURNED TO CVG.  CYCLED BOTH PACKS WITH NO EFFECT ON NOISE, NOISE STOPPED DESCENDING THROUGH 7K.  REPLACED LT & RT WATER SEPARATOR BAGS, FOUND BOTH DRAIN SCREENS ON WATER BAG HOUSING CLOGGED.  CLEANED SAME, FOUND RT WATER BAG HOUSING CHECK VALVE STICKING.  REPLACED SAME, SYS CHECKS NORMAL.

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