ASN Wikibase Occurrence # 41293
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Date: | Wednesday 25 May 1988 |
Time: | 15:07 |
Type: | Chappel RATSREPUS 300 |
Owner/operator: | private |
Registration: | N889HC |
MSN: | 2 |
Total airframe hrs: | 4 hours |
Engine model: | LYCOMING IO-540-K1A5 |
Fatalities: | Fatalities: 1 / Occupants: 1 |
Aircraft damage: | Destroyed |
Category: | Accident |
Location: | Pontiac, MI -
United States of America
|
Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
Nature: | Private |
Departure airport: | Pontiac, MI (PTK) |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:THE PILOT WAS TESTING THIS EXPERIMENTAL ACROBATIC AIRCRAFT, MAKING A SECOND LOW PASS OVER THE RUNWAY WHEN A PORTION OF THE LEFT WING SEPARATED FROM THE AIRCRAFT, FOLLOWED BY LOSS OF THE LEFT AILERON, 1 1/2 ROLLS TO THE LEFT AND GROUND IMPACT. THE AIRFRAME TOTAL TIME WAS 4 HOURS. ON-SCENE INSPECTION REVEALED NO MASS BALANCE IN THE AILERONS. WITNESSES ESTIMATE SPEEDS AT OR ABOVE 150 MPH. A DESIGNATED ENGINEERING REPRESENTATIVE IN THE AREA OF FLUTTER AND VIBRATION STATED HE HAD RECOMMENDED THAT THE AIRSPEED BE LIMITED TO A MAXIMUM SPEED OF APPROXIMATELY 135 MPH UNTIL GROUND VIBRATION TESTS WERE CONDUCTED. CAUSE: DESTRUCTIVE WING/AILERON FLUTTER IS SUSPECTED, BUT NOT SUFFICIENTLY SUBSTANTIATED THROUGH RESEARCH AND CALCULATIONS TO BE CITED AS THE PROBABLE CAUSE OF THIS ACCIDENT.
Sources:
NTSB:
http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001213X25637 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] |
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