ASN Wikibase Occurrence # 131828
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| Date: | Tuesday 31 August 1999 |
| Time: | 12:15 LT |
| Type: |  Piper PA-28-180 |
| Owner/operator: | Falls Aero, Inc, |
| Registration: | N5172L |
| MSN: | 28-4458 |
| Year of manufacture: | 1967 |
| Total airframe hrs: | 4227 hours |
| Engine model: | Lycoming O-360-A4A |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Peyton, CO -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | (00V) |
| Laramie, WY (KLAR) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Prior to takeoff, the pilot observed the winds to be out of the northwest at 10 knots, and he selected runway 33 for departure. He performed a density altitude calculation and it was determined to be 9,747 feet msl. Takeoff was normal, and the pilot climbed out at 80 mph. During initial climb, the airspeed dropped to 60 mph. He lowered the nose to gain airspeed and flew the aircraft under a set of power lines. Shortly thereafter, the aircraft impacted slightly inclining terrain. The four occupants exited the aircraft, and the airplane was subsequently consumed by fire. At 1154, the closest reporting weather facility located 10.4 nm to the southwest was reporting the winds to be from 110 degrees at 7 knots. At 1254, the winds were variable at 4 knots. Several pilots in the area reported encountering sudden windshift conditions near the time of the accident. According to calculated weight and balance data, the aircraft was slightly under maximum gross weight and within center of gravity limits at takeoff. There is no performance data in the Airplane Flight Manual for takeoffs above 7,000 feet density altitude.
Probable Cause: The pilot's loss of control resulting in inadvertent stall/mush during initial climb following takeoff. Factors were the unfavorable, sudden windshift conditions, the high density altitude, and the manufacturer's failure to provide adequate density altitude performance information in the Airplane Flight Manual.
Accident investigation:
 |
|
Sources:
NTSB DEN99LA156
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 14-Dec-2017 08:48 | ASN Update Bot | Updated [Destination airport, Source, Narrative] |
| 07-Apr-2024 18:19 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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