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ASN Wikibase Occurrence # 18548
Last updated: 10 November 2020
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Date:24-JUN-1973
Time:16:58
Type:Silhouette image of generic C150 model; specific model in this crash may look slightly different
Cessna 150C
Owner/operator:Royal Artillery Aero Club
Registration: G-ASHF
C/n / msn: 15059908
Fatalities:Fatalities: 1 / Occupants: 1
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:into the sea off Swanage, Dorset -   United Kingdom
Phase: En route
Nature:Private
Departure airport:Bournemouth/Hurn (EGHH)
Destination airport:Bournemouth/Hurn (EGHH)
Investigating agency: AIB
Narrative:
The aircraft was on a solo local flight and while flying over the sea at about 1,500 feet it suddenly went into a near vertical spiralling dive. This terminated with the aircraft becoming inverted at which time, the outer section of the left wing broke off, after which the aircraft disintegrated and fell into the sea. The pilot was killed.

The report concludes that the aircraft broke up in flight, the accident sequence being initiated by the failure of the fin front attachment. This precipitated an involuntary manoeuvre in which the aircraft was subjected to a negative 'g' loading in excess of its design ultimate limit resulting in a total in-flight structural break-up. The most probable cause of the failure of the fin front attachment was movement in the tail unit as a result of looseness and wear of the two elevator centre hinge bracket bolts and elongation of their associated holes.

Registration G-ASHF cancelled by the CAA 1/12/75 as aircraft "destroyed"

Sources:

1. http://www.caa.co.uk/docs/HistoricalMaterial/G-ASHF.pdf
2. http://www.aaib.gov.uk/cms_resources.cfm?file=/8-1975%20G-ASHF.pdf
3. http://web.archive.org/web/20130321095657/http://daveg4otu.tripod.com:80/dorset/dorcrash.html

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


Revision history:

Date/timeContributorUpdates
17-May-2008 11:10 ASN archive Added
27-Sep-2011 09:49 Uli Elch Updated [Cn, Operator, Location, Departure airport, Destination airport, Source, Narrative]
05-Aug-2012 16:48 Dr. John Smith Updated [Operator, Location, Source, Embed code, Narrative]
16-Jun-2013 21:40 Dr. John Smith Updated [Time, Operator, Source, Narrative]
06-Jul-2015 03:13 Dr. John Smith Updated [Narrative]

Corrections or additions? ... Edit this accident description