AAIB investigation to Aeronca C3, G-AEFT

Forced landing following propeller detachment, near Polzeath, Cornwall on 14 October 2015.

From:
Air Accidents Investigation Branch
Published
11 February 2016
Category:
General aviation - fixed wing
Report type:
Bulletin - Correspondence investigation
Date of occurrence:
14 October 2015
Aircraft type:
Aeronca C3
Location:
Near Polzeath, Cornwall
Registration:
G-AEFT

Summary:

皇冠体育app aircraft was flying at 2,500 ft when the propeller suddenly detached. 皇冠体育app pilot was able to execute a forced landing with no further damage to the aircraft. 皇冠体育app detachment had been caused by a fatigue crack which had developed in the tapered end of the crankshaft. This problem had been recognised in 1939 but had not resulted in any mandatory requirements. 皇冠体育app Light Aircraft Association (LAA) have now mandated a repetitive visual and dye-penetrant inspection of the crankshaft for corrosion and cracking.

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Published 11 February 2016
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