ANC08LA078

NTSB accident investigation · Piper PA-18-150 · Iliamna, AK · June 24, 2008

Accident · No injuriesLimited investigationFinal report
Date
June 24, 2008, 09:45 local (17:45 UTC)
Place
Iliamna, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N3236PPiper PA-18-150
Defining event
Approach-VFR pattern final: Loss of engine power (partial)
Weather
Visual (VMC) · Day
Status
Completed · report December 11, 2008
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA-AL-ANC-FSDO 03
FAA report
20080624840949A
Case key
68308

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

A loss of engine power for an undetermined reason during an approach for landing, which resulted in a forced landing and collision with terrain.

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.

Power plantAircraft › Aircraft power plant · MalfunctionPiper PA-18-150: 2 casesAll aircraft: 198 casesProbable cause
Not determinedNot determined › Not determined · Unknown/Not determinedPiper PA-18-150: 9 casesAll aircraft: 2,247 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 pilot departed a remote area about 20 miles west of his intended destination airport. At that time, the airplane had about 6 gallons of fuel in the left wing fuel tank, and the right wing fuel tank was nearly empty. As the flight approached the airport, the engine began to sputter and lose power. He switched to the right tank, but it ran for only a few seconds, and the engine sputtered. He switched back to the left fuel tank, but the engine continued to sputter, and the airplane lost altitude. He selected a road as a forced landing spot, but was unable to reach the road. The airplane collided with a tree and tundra, about 1.5 miles short of the airport. The pilot said that after the collision, the engine was still running, and he shut it down. The airplane received structural damage to the wings and fuselage. The pilot indicated that after the accident, the left fuel tank was still showing about 4 gallons in the left wing tank sight gauge. Recovery personnel reported that they drained about 5 gallons from the left tank during retrieval of the airplane.

Factual narrative

On June 24, 2008, about 0945 Alaska daylight time, a tundra tire-equipped Piper PA-18 airplane, N3236P, sustained substantial damage during a forced landing following a loss of engine power, about 1.5 miles west of the Iliamna Airport, Iliamna, Alaska. The airplane was being operated by the pilot as a visual flight rules (VFR) cross-country personal flight under Title 14, CFR Part 91, when the accident occurred. The private certificated pilot, and the sole passenger, were not injured. Visual meteorological conditions prevailed. The flight originated from Tularik Creek, about 20 miles west of Iliamna, about 0915, and no flight plan was filed. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on June 25, the pilot reported that he departed Tularik Creek and flew eastbound toward Iliamna. He said he had about 6 gallons in the left wing fuel tank, and the right wing fuel tank was nearly empty. As the flight approached Iliamna, the engine began to sputter and lose power. He switched to the right tank, but it ran for only a few seconds, and the engine sputtered. He switched back to the left fuel tank, but the engine continued to sputter, and the airplane lost altitude. He selected a road as a forced landing spot, but was unable to reach the road. The airplane collided with a tree and tundra, about 1.5 miles short of runway 07 at Iliamna. The pilot said that after the collision, the engine was still running, and he shut it down. The airplane received structural damage to the wings and fuselage. The pilot indicated that after the accident, the left fuel tank was still showing about 4 gallons in the left wing tank sight gauge. Recovery personnel reported that they drained about 5 gallons from the left tank during retrieval of the airplane. The airplane and engine was not examined by NTSB or FAA personnel. At 0953, an aviation routine weather report (METAR) at Iliamna was reporting, in part: Wind, 090 degrees (true) at 18 knots, gusts to 24 knots; visibility, 10 statute miles; clouds and sky condition, few at 7,500, 11,000 feet scattered; temperature, 50 degrees F; dew point, 39 degrees F; altimeter, 29.81 inHg.

Aircraft

Registration
N3236P
Reported as
Piper PA-18-150
Category
Airplane
Serial number
18-6766
Airframe hours
3,488
Engine
Lycoming O-320 SERIES, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Mitchell S. Jolin
Registered owner
Mitchell S. Jolin
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 2, 2008
Departed
Tularik Creek, AK
Destination
PAIL · Iliamna, AK
Airport
PAIL · Iliamna

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
33
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land, Single-engine sea
Medical
Class 3, Without waivers/limitations
Seat
Front
Flight hours
462 total · 401 in this make and model · 403 as pilot in command · 57 in the last 90 days · 15 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
90° at 18 knots, gusting 24
Visibility
10 statute miles
Lowest ceiling
None
Temperature
50 °F, dew point 39 °F
Altimeter
29.80 inHg
Observed at
PAIL, 1 nm away

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 N3236P · 4

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