ASN Wikibase Occurrence # 131629
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| Date: | Saturday 14 December 1991 |
| Time: | 13:39 LT |
| Type: |  Cessna 172G |
| Owner/operator: | Butte Aviation, Inc. |
| Registration: | N4244L |
| MSN: | 17254313 |
| Total airframe hrs: | 4734 hours |
| Engine model: | CONTINENTAL O-300-C |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Jackson, MT -
 United States of America
|
| Phase: | En route |
| Nature: | Survey |
| Departure airport: | Butte, MT (KBTM) |
| Butte, MT (KBTM) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT WAS FLYING UP A MOUNTAIN RIDGE AT A LOW ALTITUDE ABOVE THE GROUND, SEARCHING FOR CATTLE, WHEN HE ENCOUNTERED DOWNDRAFT WINDS. HE ATTEPTED TO TURN DOWNSLOPE AT A LOW AIRSPEED AND THE AIRCRAFT STALLED. THE PILOT HAD 17 DEGREES FLAPS EXTENDED AND THE ACFT WAS NEAR GROSS WEIGHT. THE ELEVATION AT THE ACCIDENT SITE WAS 7500 FT. MSL.
Probable Cause: LOSS OF CONTROL DUE TO THE PILOT'S FAILURE TO MAINTAIN PROPER AIRSPEED. FACTORS RELATING TO THE ACCIDENT WERE THE IMPROPER FLAP SETTING, THE HIGH DENSITY ALTITUDE, MOUNTAINOUS TERRAIN, LACK OF EXPERIENCE BY THE PILOT, AND DOWNDRAFFT WINDS.
Accident investigation:
 |
|
Sources:
NTSB SEA92LA028
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 11-Apr-2024 10:54 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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