# SDR QR9R2023122800001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 28, 2023
- Submitted: December 28, 2023
- Operation: General aviation
- Filed by: [M1 Support Services, repair station QR9R369D](https://openairdocs.org/faa-repair-station/QR9R369D/m1-support-services.md) (OpenAirDocs)
- Make and model: Bolkms BK117C2
- Aircraft serial: 08720589221
- Aircraft time: 2,750 hours
- System (JASC): [6210 · Main Rotor Blades](https://openairdocs.org/jasc/6210)
- Part: Screw
- Part number: LN9037S08034
- Part serial: NA
- Condition: Mismanufactured
- Location: Unknown
- 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/QR9R2023122800001

## Discrepancy

DURING INSTALLATION, MAINTENANCE DETECTED THE HEX HEAD SCREW COTTER PIN HOLE WAS HIGHER/CLOSER TO THE TOP/HEAD OF THE BOLT WHICH PREVENTED THE COTTER PIN FROM GOING THROUGH.

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