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) |
Destination airport: | Burns, OR |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative: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:
|
| |
Investigating agency: | NTSB |
Report number: | SEA91FA156 |
Status: | Investigation completed |
Duration: | 1 year and 10 months |
Download report: | Final report |
|
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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