# SDR CA970527008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 20, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Engine: Pwa PT6A50
- System (JASC): [7322 · Fuel Control/Reciprocating Engines](https://openairdocs.org/jasc/7322)
- Part: Fuel Contrl Unit
- Part number: 324475316
- Condition: Sheared Shaft
- Location: Nr 4 Eng
- Stage of operation: CR
- Nature of condition: O
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA970527008

## Discrepancy

(CAN) IN CRUISE AT 16,600 FEET THE #4 ENGINE SURGED. THE TORQUE, T5 AND NG ALL CLIMBED BEYOND OPERATING LIMITS. EMERGENCY PROCEDURES WERE CONDUCTED AND THE ENGINE SHUTDOWN. POST FLIGHT INSPECTION FOUND THE FUEL CONTROL UNIT TO FUEL PUMP INPUT SHAFT HAD SHEARED CAUSING THE ENGINE TO OVERSPEED. BOTH THE ENGINE AND PROPELLER WILL BE SHIPPED FOR INVESTIGATION WITH A REPORT TO FOLLOW.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.