# SDR CA160121022

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 2016
- Submitted: April 22, 2016
- Operation: General aviation
- Make and model: Doug MD 900
- Registry model: [Doug MD 900](https://openairdocs.org/model/mcdonnell-douglas-helicopter-md-900) (OpenAirDocs)
- Aircraft time: 2,303 hours
- Engine: Pwc PW207E
- System (JASC): [7921 · Engine Oil Cooler](https://openairdocs.org/jasc/7921)
- Part: Hose
- Part number: 900D3409526105
- Condition: Cracked
- Location: Oil Cooler
- Part time: 2 hours
- Stage of operation: IN
- How discovered: O
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA160121022

## Discrepancy

(CAN) AFTER SHUT DOWN FOLLOWING A SHORT UNRELATED TEST FLIGHT, TRANSMISSION OIL WAS DISCOVERED COVERING THE TRANSMISSION DECK AND FLOWING DOWN THE SIDES OF THE FORWARD FUSELAGE. APPROXIMATELY 5 QUARTS OF THE 10 QUART CAPACITY IN THE MAIN TRANSMISSION HAD LEAKED OUT. THE WAS NO INDICATION OF LOSS OF OIL PRESSURE OR HIGH TRANSMISSION TEMPERATURE. A SUBSEQUENT INSPECTION REVEALED THAT THE RT TRANSMISSION OIL COOLER HOSE WAS CRACKED NEAR THE WELD WHERE THE HOSE TRANSITIONS FROM A RIGID TUBE TO A FLEXIBLE CORRUGATED TUBE.

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