ASN Wikibase Occurrence # 40417
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| Date: | Sunday 11 September 1983 |
| Time: | 14:25 |
| Type: |  Partenavia P.68C |
| Owner/operator: | Windward Aviation |
| Registration: | N29561 |
| MSN: | 266 |
| Total airframe hrs: | 342 hours |
| Engine model: | LYCOMING IO-360-A1B6 |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Plainview, TX -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Demo/Airshow/Display |
| Departure airport: | Plainview, TX |
| Plainview, TX | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PLT WAS EXECUTING A HIGH SPEED PASS OVER THE RWY AT ABOUT 250 FT AGL. THE PLT THEN BEGAN A RAPID PULL-UP & BOTH WINGS SEPARATED JUST OUTBOARD OF THE ENG NACELLES. RECONSTRUCTION OF THE SEQUENCE FROM A VIDEOTAPE REVEALED THAT THE ACFT'S SPEED AT THE TIME OF THE WING SEPARATIONS WAS 220 KTS. VNE FOR THE ACFT IS 193 KTS. IT WAS CALCULATED THAT, AT 220 KTS & AN 8 DEG NOSE-UP PITCH, THE 'G' LOAD AT THE TIME OF THE WING SEPARATIONS WOULD HAVE BEEN 8.3 G'S.
The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND
OVERCONFIDENCE IN AIRCRAFT'S ABILITY..PILOT IN COMMAND
AIRSPEED..EXCEEDED..PILOT IN COMMAND
WING..OVERLOAD
DESIGN STRESS LIMITS OF AIRCRAFT..EXCEEDED..PILOT IN COMMAND
Contributing Factors:
WING..FAILURE,TOTAL
WING..SEPARATION
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20001214X44523
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 10-Aug-2017 17:05 | harro | Updated [Nature, Departure airport, Destination airport, Source, Embed code, Narrative] |
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