ANC07TA093

NTSB accident investigation · Piper PA-18-150 · Valdez, AK · September 3, 2007

Accident · No injuriesFinal report
Date
September 3, 2007, 15:45 local (23:45 UTC)
Place
Valdez, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N2355HPiper PA-18-150
Weather
Visual (VMC) · Day
Status
Completed · report April 30, 2008
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Anchorage FSDO-03
FAA report
20070903020969A
Case key
66591

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

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Probable cause

The pilot's selection of unsuitable terrain for takeoff. A factor contributing to the accident was an inadvertent stall/mush.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of control - in flightTakeoff - initial climb
Stall/mush - inadvertentPilot in commandFactor
Terrain condition - short runway/landing area
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - ground

Analysis

The commercial certificated State Trooper pilot reported he was on an aerial patrol when he landed to survey an off airport landing site. Upon completion of the survey, he said he attempted a short field takeoff, and as he approached rising terrain after becoming airborne, he applied a second notch of flaps. He said he applied forward pressure to maintain level flight, but the airplane descended, and the left wing struck the ground. The airplane sustained substantial damage to both wings and the fuselage.

Factual narrative

On September 3, 2007, about 1545 Alaska daylight time, a tailwheel equipped Piper PA-18-150 airplane, N2355H, sustained substantial damage when it collided with terrain, following an uncontrolled descent during takeoff initial climb from an unimproved, off-airport landing site, about 27 miles northeast of Valdez, Alaska. The airplane was being operated by the State of Alaska, Department of Public Safety, Anchorage, Alaska, as a visual flight rules (VFR) public use flight, when the accident occurred. The solo commercial certificated pilot was not injured. Visual meteorological conditions prevailed, and company flight following procedures were in effect.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on September 5, a supervisor for the operator said the pilot told him that during takeoff, after climbing out of ground effect, the airplane lost lift and descended. He reported to the supervisor that the left wing caught in willows and impacted the ground. The pilot reported damage to both wings and the fuselage.

In a written statement, the pilot reported that he was doing routine aerial patrol looking for illegal hunters. He said part of the patrol included surveying off airport landing sites. He reported that he landed to survey a site, and upon completion of the survey he attempted a short field takeoff. He said after becoming airborne he was approaching ascending terrain, and applied a second notch of flaps. He said he applied forward pressure to maintain level flight, but the airplane descended, and the left wing struck the ground.

The airplane was not examined by the NTSB.

Aircraft

Registration
N2355H
Reported as
Piper PA-18-150
Category
Airplane
Serial number
18-7909175
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Public aircraft - state · Part 91
Operator
State of Alaska
Registered owner
State of Alaska
Airworthiness certificate
Standard, Normal
Departed
Valdez, AK
Destination
Valdez, AK
Flight plan
Company VFR

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
41
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
May 1, 2007
Seat
Front
Flight hours
2,143 total · 235 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 10 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
55 °F
Altimeter
30.14 inHg

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 N2355H · 1

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