# SDR 95ZZZX3630

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 7, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N733CF](https://openairdocs.org/aircraft/N733CF), registered now
- Make and model: Semco CHALLENGER
- Registry model: [Semco CHALLENGER](https://openairdocs.org/model/semco-balloon-challenger) (OpenAirDocs)
- Aircraft serial: 1041
- Engine: Lyc ALF502L2
- System (JASC): [7260 · Turbine Engine Accessory Drive](https://openairdocs.org/jasc/7260)
- Part: Lock Pin
- Part number: 208312604
- Condition: Failed
- Location: Assory Dr Gr Box
- Part time: 1,486 hours
- Component: 208325023
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/95ZZZX3630

## Discrepancy

OIL ANALYSIS, FINDING AN INCREASE IN METAL CONTAMINATION, INVESTIGATION REVEALED THE ACCESSORY DRIVE GEARBOX DRIVESHAFT LOCK ASSY POST SB ALF502L 72-0175, HAD DROPPED DOWN ONTO THE STARTER DRIVESHAFT MACHINING AWAY AT THE DRIVESHAFT WHICH CAUSED THE REPLACEMENT OF THE FOLLOWING COMPONENTS:  ACCESSORY DRIVE GEARBOX MODULE, FUEL/OIL HEAT EXCHANGER, THE ENGINE DRIVEN OIL PUMP ASSY AND THE NR 12 BEARING.  SUSPECT CAUSED BY FAILURE OF THE DRIVESHAFT LOCK PIN (PN 2-083-126-04).  RECOMMEND ASAP (ESPECIALLY IF NOT ON ACTIVE OIL ANALYSIS PROGRAM) TO REMOVE ACCESSORY DRIVE GEARBOX DRIVESHAFT LOCK ASSY AND INSPECT DRIVESHAFT LOCK PIN (PN 2-083-126-04) FOR BEING ANYTHING LESS THAN STRAIGHT WITH EVENLY CUT ENDS.

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