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ASN Wikibase Occurrence # 44783
Last updated: 27 April 2020
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Date:16-JUL-2004
Time:21:45
Type:Silhouette image of generic C170 model; specific model in this crash may look slightly different
Cessna 170B
Owner/operator:Private
Registration: N4588C
C/n / msn: 25532
Fatalities:Fatalities: 4 / Occupants: 4
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Willow, AK -   United States of America
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:Private
Departure airport:Talkeetna, AK (PATK)
Destination airport:Anchorage, AK (PAMR)
Investigating agency: NTSB
Narrative:
The private certificated pilot was returning from a round-robin VFR personal flight with three passengers. The flight was paralleling a rural highway, and was observed by a witness about 30 feet above the trees, southbound on the west side of the highway. The nose of the airplane appeared "slightly up." It then made a smooth right turn, about 180 degrees toward the north, nosed down about 45 degrees, and descended from view into the trees. Another witness reported that she observed the airplane northbound at a low altitude on the west side of the highway. The airplane appeared to be making a right banking turn, and then nosed down toward the trees. The airplane began a 3/4 spiral turn downward and disappeared into the trees. An on-site investigation disclosed that the airplane collided with several trees, and then struck soft ground in about a 45 degree nose down attitude. The cabin floor was oriented about 45 degrees to the right. Numerous broken tree limbs were observed about 50 feet above the impact site. The empennage was separated from the main fuselage about the forward attach point of the vertical stabilizer, and was located about 20 feet north of the main impact site. An examination of the engine revealed no evidence of any preimpact mechanical malfunctions.
Probable Cause: The pilot's failure to maintain adequate airspeed, which resulted in an inadvertent stall while maneuvering, and a collision with trees and terrain during an uncontrolled descent.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20040727X01073&key=1


Revision history:

Date/timeContributorUpdates
28-Oct-2008 00:45 ASN archive Added
21-Dec-2016 19:24 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
07-Dec-2017 18:13 ASN Update Bot Updated [Operator, Source, Narrative]

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