# SDR 2021FA0000272

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 29, 2021
- Submitted: October 1, 2021
- Operation: General aviation
- Aircraft: [N633JH](https://openairdocs.org/aircraft/N633JH), registered now
- Make and model: Hughes 369E
- Registry model: [Hughes 369E](https://openairdocs.org/model/hughes-helicopters-369e) (OpenAirDocs)
- Aircraft serial: 0230E
- Aircraft time: 22,403 hours, 20,836 cycles
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Hub
- Part number: 369D21200503
- Part serial: 388
- Condition: Worn
- Location: Main Rotor
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2021FA0000272

## Discrepancy

DURING A PREFLIGHT INSPECTION ONE OF THE MAIN ROTOR HUB DROOP STOP FOLLOWER ROLLER SHAFTS WAS FOUND PROTRUDING DOWNWARD FROM THE PLUNGER ASSEMBLY. FURTHER INSPECTION FOUND THAT THE COTTER PIN HAD WORN INSIDE THE ROLLER SHAFT AND HAD LOST ITS RETAINING ABILITY.

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