# SDR 97ZZZX4858

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 6, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N161KA
- Make and model: Kaman K-1200
- Registry model: [Kaman K-1200](https://openairdocs.org/model/kaman-aerospace-k-1200) (OpenAirDocs)
- Aircraft serial: A940016
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Oil Pump
- Part number: K974120107
- Condition: Seized
- Location: M/R Transmission
- Part time: 1,687 hours
- Component: Kaman, K974002101
- Stage of operation: NR
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX4858

## Discrepancy

OIL PUMP SEIZED ON START-UP.  NO SHEAR SHAFT WAS INCORPORATED IN OIL PUMP.  SEIZURE CAUSED DAMAGE TO PUMP DRIVE RING GEAR TEETH INSIDE TRANSMISSION ASSY AS WELL AS OIL PUMP ASSY.  IF SHEAR SHAFT WAS INCORPORATED IN OIL PUMP, ONLY PUMP WOULD HAVE NEEDED CHARGING IN THIS CASE, NOT PUMP AND TRANSMISSION.

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