# SDR QR9R2024090600002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 6, 2024
- Submitted: September 6, 2024
- 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: 10721739424
- Aircraft time: 4,139 hours
- System (JASC): [2100 · Air Conditioning System](https://openairdocs.org/jasc/2100)
- Part: Duct
- Part number: EC14570401
- Part serial: NA
- Condition: Out Of Position
- Location: Inlet
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R2024090600002

## Discrepancy

REF AIRCOMM STC SR00601DE. INSPECTION FOUND TAIL ROTOR DRIVESHAFT (PN: B651M1001101) SCORED FROM CONTACT WITH THE CONDENSER DUCT INSTALLATION ROUTED OVER THE TAIL ROTOR DRIVESHAFT. DAMAGE TO THE SHAFT FROM SCORING REQUIRES REPLACEMENT OF THE SHAFT. DAMAGE COULD RESULT IN INFLIGHT FAILURE AND LOSS OF CONTROL OF THE TAIL ROTOR SYSTEM. DUCT ROUTED AND CLAMPED IAW DRAWING NO. EC145-705 REV: A AND ADDITIONAL CLAMP INSTALLED AS MINOR DEVIATION TO THE STC AND IAW AC43.13.

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