ASN Wikibase Occurrence # 39032
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Saturday 23 April 1994 |
| Time: | 11:35 LT |
| Type: | Rebel 300 |
| Owner/operator: | Martin A. Vavra |
| Registration: | N12MV |
| MSN: | S-89-0022 |
| Engine model: | Lycoming AEIO-540-D4B5 |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Wonderlake, IL -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
A witness to the accident, who was a professional pilot and an aerobatic judge certified by the International Aerobatic Club (IAC), stated the flight originated as a practice aerobatic session. He reported that the right wing folded while the airplane was positively loaded to 6 to 7 G's. Investigation revealed the main wing spar upper cap strip failed in fatigue. Tests disclosed that the strength of the composite carbon fiber material was significantly lower than the design specification due to high porosity, excessive fiber waviness, and low fiber volume.
Probable Cause: FATIGUE AND CATASTROPHIC FAILURE OF THE MAIN WING SPAR RESULTING FROM THE DESIGNER'S EXCESSIVE, UNVERIFIED ESTIMATE OF THE STRENGTH OF THE SPAR CAP MATERIAL AND THE MANUFACTURER'S FAILURE TO ATTAIN THE SPECIFIED STRENGTH DURING THE PRODUCTION PROCESS.
Accident investigation:
 |
|
Sources:
NTSB CHI94FA140
Location
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-Apr-2024 07:54 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Source, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation