# SDR 2024FA0000457

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 18, 2024
- Submitted: June 18, 2024
- Operation: General aviation
- Aircraft: [N122AW](https://openairdocs.org/aircraft/N122AW), registered now
- Make and model: Piper PA-31-350
- Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (OpenAirDocs)
- Aircraft serial: 317652135
- Aircraft time: 19,644 hours
- Engine: Lyc TIO540J2BD
- Engine time: 3,623 hours
- Propeller: Hartzl HCE3YR2A
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: O-Ring
- Part number: MS28778166222078
- Condition: Damaged
- Location: Hyd Filter
- Part time: 4 hours
- Stage of operation: LD
- How discovered: O
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2024FA0000457

## Discrepancy

LANDING GEAR WILL NOT LOCK ON EXTENSION.  MANUALLY PUMPED GEAR DOWN AND LOCKED WITH THREE GREEN LIGHTS.  WE FOUND THE RH ENGINE HYDRAULIC FILTER RESERVOIR LEAKING FROM THE O-RING.  REMOVED HYDRAULIC FILTERS VERIFIED NO CONTAMINANTS AND REPLACED O-RING.  THE HYDRAULIC SYSTEM WAS SERVICED WITH 400 ML OF 5606.  AFTER ENGINE RUNS, SERVICE HYDRAULIC SYSTEM ADDITIONAL 50ML 5606 AND NO LEAKS NOTED.

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