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| Date: | Tuesday 1 April 2025 |
| Time: | 21:44 UTC |
| Type: |  Swearingen SA227-AC Metro III |
| Owner/operator: | Perimeter Aviation |
| Registration: | C-GYXL |
| MSN: | AC-725B |
| Year of manufacture: | 1988 |
| Engine model: | Garrett TPE331-11U-612G |
| Fatalities: | Fatalities: 0 / Occupants: |
| Other fatalities: | 0 |
| Aircraft damage: | Unknown |
| Location: | 25 nm SE From Thunder Bay Airport, ON (YQT) -
 Canada
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Thunder Bay Airport, ON (YQT/CYQT) |
| Sault Ste. Marie Airport, ON (YAM/CYAM) | |
| Investigating agency: | TSB |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
Perimeter Aviation flight PAG384, a Metro III, was in the climb out after departure from YQT, when the flight crew observed torque fluctuations on the left-hand engine (Garrett, TPE331-11U-612G) with associated yawing, oil pressure fluctuations, and engine sounds. The flight crew referenced the quick reference handbook (QRH) and shut down the engine. They declared an emergency and returned to CYQT where the aircraft landed without further incident.
Upon inspection by the operator's maintenance, the torque signal conditioner was found to be unserviceable.
Sources:
TSB A25C0031
History of this aircraft
Other occurrences involving this aircraft
| 14 July 2025 | C-GYXL | Perimeter Aviation | 0 | 80 nm N of Winnipeg International Airport, MB (YWG) | |
unk |
| Loss of pressurization | ||||||
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Apr-2025 19:01 | ASN | Added |
| 16-Apr-2025 19:04 | ASN | Updated [Aircraft type, Cn, Location, Phase, Nature, Narrative, ] |
Corrections or additions? ... Edit this accident description
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