# SDR CA020828005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2002
- Submitted: September 6, 2002
- Operation: Air carrier
- Make and model: Aerosp AS 355F1
- Registry model: [Aerosp AS 355F1](https://openairdocs.org/model/aerospatiale-as-355f1) (OpenAirDocs)
- Aircraft time: 5,249 hours
- Engine: Allsn 250C20F
- System (JASC): [6510 · Tail Rotor Drive Shaft](https://openairdocs.org/jasc/6510)
- Part: Bearing
- Part number: 350A2310534551
- Condition: Elongated
- Location: T/R Drive Shaft
- 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/CA020828005

## Discrepancy

(CAN) NOISE WAS HEARD FROM OIL COOLER FAN AREA ON SHUTDOWN.  INSPECTION REVEALED NR 6 T/R DRIVESHAFT SUPPORT BEARING BOLT HOLES HAD ELONGATED AND ALLOWED THE T/R DRIVESHAFT AND FAN SHAFT TO MOVE OUT OF ALIGNMENT.  NR 6 BEARING SUPPORT, BEARING AND BEARING TRANSMISSION WERE REPLACED. OIL COOLER FAN WAS REMOVED, INSPECTED AND REINSTALLED. FAN SHAFT BALANCE CHECK WAS CARRIED OUT AND THE AIRCRAFT WAS RETURNED TO SERVICE.

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