ASN Wikibase Occurrence # 41340
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| Date: | Friday 5 July 1991 |
| Time: | 17:45 LT |
| Type: |  Champion 7AC |
| Owner/operator: | Maskal, Anthony : Nicholas |
| Registration: | N3006E |
| MSN: | 7AC-6592 |
| Year of manufacture: | 1946 |
| Total airframe hrs: | 2292 hours |
| Engine model: | CONTINENTAL C-65-8 |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Burns, OR -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | Homedale, ID (S66) |
| Burns, OR | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE STUDENT PLT WAS THE OWNER/OPERATOR OF THE ACFT. HE AND THE PASSENGER WERE ON A PLEASURE FLT IN AN AREA OF MOUNTAINOUS TERRAIN. THE ACFT WAS SEEN TO TURN INTO A VALLEY WHERE IT SUBSEQUENTLY COLLIDED WITH THE GROUND AT AN ELEVATION OF ABOUT 5500 FT. DURING IMPACT, THE WINGS WERE BENT DOWN AND FORWARD; THERE WAS A 45 DEG CRUSH LINE ON THE LEADING EDGES OF THE WINGS. NO GROUND SCARS WERE FOUND TO INDICATE MOVEMENT AFTER GROUND IMPACT. THE ACFT'S LAST ANNUAL INSPN WAS DATED 7/22/87; HOWEVER, THE STUDENT PLT CONTINUED TO OPERATE THE ACFT; HE PERFORMED OIL CHANGES HIMSELF. NO PREIMPACT MECHANICAL FAILURE OR MALFUNCTION OF THE ENGINE WAS FOUND. THE STUDENT'S LAST MEDICAL EXAM WAS DATED 11/25/87. A TOXICOLOGY EXAM OF THE STUDENT PLT'S BLOOD SHOWED A SATURATION OF 20% CARBOXYHEMOGLOBIN. A FLT SURGEON REPORTED THAT THIS PERCENTAGE COULD CAUSE A HEADACHE, A STATE OF CONFUSION, DIZZINESS AND VISUAL DISTURBANCE. THE INVESTIGATION DID NOT DETERMINE IF THE ACFT HEATER SYSTEM COULD HAVE BEEN THE SOURCE OF CARBON MONOXIDE.
Probable Cause: IMPROPER INFLIGHT PLANNING/DECISION BY THE STUDENT PILOT (PILOT-IN-COMMAND), AND HIS FAILURE TO MAINTAIN ADEQUATE AIRSPEED, WHICH RESULTED IN A STALL. FACTORS RELATED TO THE ACCIDENT WERE: PHYSICAL IMPAIRMENT OF THE STUDENT PILOT/OWNER/OPERATOR FROM CARBON MONOXIDE, MOUNTAINOUS TERRAIN, AND HIGH DENSITY ALTITUDE.
Accident investigation:
 |
|
Sources:
NTSB SEA91FA156
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] |
| 11-Apr-2024 14:11 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Phase, Source, Narrative, Category, Accident report] |
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