# SDR 2026F00156

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 21, 2026
- Submitted: July 22, 2026
- Operation: General aviation
- Aircraft: [N505TJ](https://openairdocs.org/aircraft/N505TJ), registered now
- Make and model: Bell 429
- Registry model: [Bell 429](https://openairdocs.org/model/bell-helicopter-textron-canada-429) (OpenAirDocs)
- Aircraft serial: 57470
- Aircraft time: 752 hours, 3,569 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: O-Ring
- Part number: M834612905
- Part serial: NA
- Condition: Damaged
- Location: Zone 200
- Part time: 752 hours, 3,569 cycles
- Component: Module, Bell
- Component part number: 429380001111
- Stage of operation: NR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026F00156

## Discrepancy

AT APPROXIMATELY 0230 EDST, ENG1 WAS STARTED. AFTER STARTING ENG2, LOST HYD SYS NR 2 BEFORE DEPARTURE TO KBUF. CREW REPORTED HEARING A GRINDING NOISE AND THE PILOT REPORTED SEEING THE #2 HYD SYS INDICATION TURN RED WITH AN ASSOCIATED MASTER WARNING INDICATION BEFORE IMMEDIATE SHUTDOWN.  NOTED HYD FLUID HAD COVERED RT SIDE OF THE ACFT. ON  INSP, DISCOVERED AN O-RING  ON INBD PORT PLUG OF THE NR 2 INTEGRATED HYD MODULE HAD BLOWN OUT & CAUSED SUBSEQUENT LOSS OF HYD FLUID IN NR 2 SYSTEM.  O-RING REPLACED AND NR 2 HYD SYS SERVICED.  GROUND RUN COMPLETED FOR LEAK CHECK &  ACFT DEPARTED 1NY2 FOR HOME BASE. ACFT WAS REINSPECTED AND CLEANED ON ARRIVAL. NO FURTHER DEFECTS NOTED. ACFT RETURNED TO SERVICE.

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