# SDR OZCA2024004641

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 12, 2024
- Submitted: August 14, 2024
- Operation: Air carrier
- Aircraft: [N641BC](https://openairdocs.org/aircraft/N641BC), registered now
- Make and model: Saab SF340A
- Registry model: [Saab SF340A](https://openairdocs.org/model/saab-scania-sf340a) (OpenAirDocs)
- Aircraft serial: 069
- Aircraft time: 35,308 hours, 34,019 cycles
- Engine: Ge CT75A2
- Engine time: 43,088 hours, 42,843 cycles
- Propeller: Rotol R389*
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Overtemp
- Location: Right
- Stage of operation: AP
- How discovered: O
- Nature of condition: M, R, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/OZCA2024004641

## Discrepancy

DURING DESCENT, SEVERAL LOUD BANGS WERE HEARD FROM THE RH ENGINE WITH VIBRATIONS. MAJOR FLUCTUATIONS ON THE TORQUE AND ITT. OVERTEMP LIGHT CAME ON FOR APPROX. 5 SECONDS. TORQUE SET AT 40% THEN REDUCED TO 20%. ENGINE STABILIZED AROUND 30% TORQUE. AIRCRAFT DECLARED AN EMERGENCY LANDING AT KMIA AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED ENGINE USING A BORESCOPE WITH NO DAMAGE NOTED AND PERFORMED AMM OVERTEMP PROCEDURES. FDR DATA WAS DOWNLOADED AND ANALYZED. WAITING ON DATA ANALYSIS FROM GE TO DETERMINE NEXT ACTION.

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