Incident at FORT SMITH NT (CYSM)
2003-06-23: UPDATE TSB reported that the Northwestern Air Lease BAe Jetstream 31, registration C-FCPE, had departed Fort Smith, NT for Edmonton, AB. When climb power was selected at 400 feet above ground level (agl) the power on the right engine reduced to about 30 per cent torque. The engine (GARRETT TPE331-10UGR-516H) was secured in accordance with checklist procedures, and the aircraft returned to Fort Smith without further incident. No faults were found during a detailed maintenance examination, a ground run and a flight test, and the aircraft was returned to service. Four flights later it was observed that the Torque Temp Limiting (TTL) system test was producing abnormally large drops in torque, temps, and fuel flow. This system prevents engine damage on takeoff by bypassing a small amount of fuel if an over torque or over temperature condition is encountered. Testing determined that the TTL valve would intermittently bypass excessive amounts of fuel. The TTL valve was replaced with a serviceable unit and the aircraft was returned to service.
2003-06-18: PLR 589, a BAe 31, departed Fort Smith for Edmonton at 1632Z and at 1636Z, the crew reported an engine failure and were returning to land. The aircraft landed on Runway 11 without further problems. TSB will contact the company.
|Occurred At||- 16:32|
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Aircraft Details (1 aircraft)
|Canadian Registration||| Flightaware (Registration) | Flightaware (Tracking) | AvHerald|
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