ANC10CA034

NTSB accident investigation · Piper PA-18-150 · Willow, AK · May 1, 2010

Accident · Minor injuriesData collectionFinal report
Date
May 1, 2010, 08:40 local (16:40 UTC)
Place
Willow, AK
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N6891BPiper PA-18-150
Defining event
Maneuvering-low-alt flying: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report August 12, 2010
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Federal Aviation Administration
FAA report
20100501033049A
Case key
75914

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot's failure to maintain adequate airspeed while maneuvering, which resulted in an aerodynamic stall.

Findings · 2

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: airspeedAircraft › Aircraft oper/perf/capability · Not attained/maintainedPiper PA-18S-150: 1 caseAll aircraft: 1,681 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotPiper PA-18S-150: 5 casesAll aircraft: 9,295 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The private pilot, with one passenger, was on a Title 14, CFR Part 91, personal flight when the accident occurred. The purpose of the flight was to search for a missing friend in an area of remote tree and snow-covered terrain. The pilot said that while flying slow and maneuvering at 75-feet above the ground, his passenger saw the missing man lying on the ground near a snow-covered meadow. The pilot reported that as he started a right turn back to the meadow, he added engine power, and initiated a climb, but the right wing stalled. He said that he initiated a stall recovery, but that the airplane descended nose down into the trees. The pilot said that there were no mechanical problems with the airplane prior to the accident. The airplane sustained substantial damage to the wings, fuselage, and empennage.

Factual narrative

The private pilot, with one passenger, was on a personal flight to search for a missing friend in an area of remote tree- and snow-covered terrain. The pilot said that while flying slow and maneuvering at 75 feet above the ground, his passenger saw the missing man lying on the ground near a snow-covered meadow. The pilot reported that, as he started a right turn back to the meadow, he added engine power and initiated a climb but that the right wing stalled. He said that he initiated a stall recovery, but that the airplane descended nose-down into the trees. The pilot said that there were no mechanical problems with the airplane prior to the accident. The airplane sustained substantial damage to the wings, fuselage, and empennage.

Aircraft

Registration
N6891B
Reported as
Piper PA-18-150
Category
Airplane
Serial number
18-5080
Airframe hours
4,031
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Theodore A. Schachle
Registered owner
Theodore A. Schachle
Airworthiness certificate
Standard, Normal
Departed
Willow, AK
Destination
Willow, AK
Flight plan
Unknown

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
52
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
May 8, 2009
Flight hours
1,232 total · 1,232 in this make and model · 34 in the last 90 days · 13 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
39 °F

Docket · 1

The files NTSB released with the investigation on July 7, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 751 KB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N6891B · 1

Matched to the same aircraft by N-number and date.