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ASN Wikibase Occurrence # 35828
Last updated: 25 November 2021
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Date:27-APR-1995
Time:12:10
Type:Wittman O&O
Owner/operator:private
Registration: N41SW
MSN: 13
Fatalities:Fatalities: 2 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Stevenson, AL -   United States of America
Phase: En route
Nature:Private
Departure airport:Ocala, FL (FDO4)
Destination airport:Oshkosh, WI (OSH)
Investigating agency: NTSB
Narrative:
REPORTS FROM GROUND WITNESSES, NONE OF WHOM ACTUALLY SAW THE AIRPLANE, VARIED FROM HEARING A HIGH REVVING ENGINE TO AN EXPLOSION. EXAMINATION OF THE WRECKAGE REVEALED THAT THE AIRPLANE EXPERIENCED AN IN-FLIGHT BREAKUP. DAMAGE AND STRUCTURAL DEFORMATION WAS INDICATIVE OF AILERON-WING FLUTTER. WING FABRIC DOPE WAS DISTRESSED OR MISSING ON THE AFT INBOARD PORTION OF THE LEFT WING UPPER SURFACE AND ALONG THE ENTIRE LENGTH OF THE TOP OF THE MAIN SPAR. LARGE AREAS OF DOPE WERE ALSO MISSING FROM THE LEFT WING UNDERSURFACE. THE ENTIRE FABRIC COVERING ON THE UPPER AND LOWER SURFACES OF THE RIGHT WING HAD DELAMINATED FROM THE WING PLYWOOD SKIN. THE DOPED FINISH WAS SEVERELY DISTRESSED AND MOTTLED. THE FABRIC COVERING HAD NOT BEEN INSTALLED IN ACCORDANCE WITH THE POLY-FIBER COVERING AND PAINT MANUAL; THE PLYWOOD WAS NOT TREATED WITH THE POLY-BRUSH COMPOUND. CAUSE: AILERON-WING FLUTTER INDUCED BY SEPARATION AT THE TRAILING EDGE OF AN UNBONDED PORTION OF WING FABRIC AT AN AILERON WING STATION. THE DEBONDING OF THE WING FABRIC WAS A RESULT OF IMPROPER INSTALLATION.

Sources:

NTSB: https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001207X03218


Images:


This aircraft crashed en-route to Oshkosh on April 27, 1995, taking the lives of Steve and Paula Whittman. A plaque, the propeller, and a fragment of the tail fabric are on display at the EAA AirVenture Museum as a memorial to Steve and his contributions to experimental aviation.

Revision history:

Date/timeContributorUpdates
24-Oct-2008 10:30 ASN archive Added
16-Jun-2016 06:24 Anon. Updated [Photo, ]
21-Dec-2016 19:22 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]

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