ASN Wikibase Occurrence # 266037
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| Date: | Monday 12 July 2021 |
| Time: | 17:10 LT |
| Type: |  Convair CV-580 |
| Owner/operator: | Saskatchewan Public Safety Agency-Air Operations |
| Registration: | C-GVSK |
| MSN: | 238 |
| Fatalities: | Fatalities: 0 / Occupants: |
| Aircraft damage: | None |
| Location: | near La Ronge, SK -
 Canada
|
| Phase: | En route |
| Nature: | Fire fighting |
| Departure airport: | Buffalo Narrows Airport, SK (YVT/CYVT) |
| La Ronge Airport, SK (YVC/CYVC) | |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
A Convair CV-580 aircraft operated by the Saskatchewan Public Safety Agency-Air Operations, was en route from Buffalo Narrows (CYVT), SK to La Ronge (CYVC), SK via the Forks wildfire. After finishing wild fire suppression activities, while en route to CYVC, the crew of C-GVSK observed fluctuations in the propeller rpms and that the propellers were out of sync. They attempted to manually sync the props, which resulted in the right-hand propeller (Hamilton Standard 54H60-77) going into an overspeed condition and an associated pitch lock. The crew made attempts to recover from the pitch lock but were unable. They then shut down the right-hand engine (Allison 501-D22G) as per the checklist. The flight crew declared an emergency and carried out an uneventful landing in YVC with the right-hand engine inoperative.
During a subsequent inspection, maintenance crews troubleshot the snag and replaced the R/H valve housing on the prop governor and the propeller synchronization box. The aircraft was returned to service the following day.
Sources:
TSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Jul-2021 08:03 | harro | Added |
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