# SDR QR9R20220801001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 1, 2022
- Submitted: August 1, 2022
- 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: 10721749425
- Aircraft time: 3,141 hours
- System (JASC): [6300 · Main Rotor Drive System](https://openairdocs.org/jasc/6300)
- Part: Filter
- Part number: 1171264821
- Part serial: 3640
- Condition: Damaged
- 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/QR9R20220801001

## Discrepancy

AFTER RECEIVING PART FROM SUPPLY AND PRIOR TO INSTALLATION, MAINTENANCE DETECTED THE FILTER ASSEMBLY MATING SURFACE WAS DAMAGED BEYOND LIMITS.

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