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ASN Wikibase Occurrence # 217692
Last updated: 26 November 2021
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Date:20-AUG-1987
Time:14:10
Type:Silhouette image of generic AT3P model; specific model in this crash may look slightly different
Air Tractor AT-301
Owner/operator:
Registration: VH-JFA
MSN: 301-0622
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Substantial
Location:10km E of Corryong, VIC -   Australia
Phase: Landing
Nature:Agricultural
Departure airport:YCRG
Destination airport:YCRG
Investigating agency: BASI
Narrative:
The pilot was spraying a pine forest in hilly country. The spray runs were made in the downhill direction only, which required a low power setting during application. When the pilot applied power at the end of a particular run, engine roughness was noticed. He attempted to return to the departure aerodrome, but the engine performance deteriorated to the point where a precautionary landing became necessary. The only suitable area was a short stretch of road, and the pilot was forced to apply heavy braking after touchdown. The tail lifted, allowing the propeller to strike the ground, and the aircraft overturned. Investigation established that the head had separated from one of the cylinders, as a result of fatigue cracking. No abnormalities were found in the casting material of the cylinder which might have explained the onset of the fatigue. It was possible that the cracking resulted from damage caused by excessive manifold pressure and/or cylinder head temperatures applied during previous operations.

Sources:

https://www.atsb.gov.au/publications/investigation_reports/1987/aair/aair198701440/
https://www.atsb.gov.au/media/32763/aair198701440.pdf

Accident investigation:
cover
  
Investigating agency: BASI
Status: Investigation completed
Duration:
Download report: Final report


Images:

Photo of VH-JFA courtesy AirHistory.net


Mount Gambier (YMTG / MGB)
13 June 1987; (c) David Tanner (via Daniel Tanner)

Revision history:

Date/timeContributorUpdates
13-Nov-2018 09:44 Pineapple Added

Corrections or additions? ... Edit this accident description