# SDR QR9R20201008003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 8, 2020
- Submitted: October 8, 2020
- 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
- System (JASC): [5210 · Passenger/Crew Doors](https://openairdocs.org/jasc/5210)
- Part: Structure
- Part number: B521M3834966
- Condition: Worn
- Location: Main Door
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R20201008003

## Discrepancy

SUBMITTED TO REVEAL THE SYSTEMIC FAILURE RATE AND UNRELIABILITY OF THE LT UPPER CAR ASSEMBLY.  EXCESSIVE WEAR IS DETECTED ON THE 3 WHEELS, SLIDE, AND SUPPORT OF CAR ASSEMBLY RESULTING IN CABIN DOOR NOT FUNCTIONING PROPERLY, COMING OFF TRACK, OR FALLING OFF AIRFRAME.

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