ANC00LA066

NTSB accident investigation · Piper PA-18-150 · Skwentna, AK · June 9, 2000

Accident · No injuriesLimited investigationFinal report
Date
June 9, 2000, 14:45 local (22:45 UTC)
Place
Skwentna, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N9739PPiper PA-18-150
Weather
Visual (VMC) · Day
Status
Completed · report May 30, 2001
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
20000609042299A
Case key
50964

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 improper positioning of the fuel tank selector, and fuel starvation. A factor in the accident was the improper service of the airplane's hydraulic brake system.

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 engine power(total) - nonmechanicalCruise
Fuel tank selector position - improperPilot in commandCause
Fluid,fuel - starvationCause
Forced landingEmergency descent/landing
Nose overLanding - roll
Landing gear,normal brake system - improperly servicedFactor

Analysis

The solo private pilot reported that while in cruise flight, about 200 feet above the ground, all engine power was lost. He said that the fuel selector valve was on the right fuel tank and that he intended to 'run the right tank dry,' then switch tanks. As the engine began to lose power, he switched the selector to the left fuel tank, but engine power was not immediately restored, and he selected a forced landing area on a sandy river bank. He added that during the landing roll, without applying the brakes, the airplane slowly nosed over. The airplane sustained substantial damage to the left wing lift strut, and rudder. The pilot stated that just prior to the accident flight he added hydraulic brake fluid to the brake system. In the pilot's written report he indicated that a postaccident inspection revealed that the main wheels would not rotate. He wrote that when he bled the hydraulic brake system, both air and pressurized hydraulic fluid escaped from the bleed valve. After bleeding the hydraulic system, both wheels operated normally.

Factual narrative

On June 9, 2000, about 1445 Alaska daylight time, a wheel equipped Piper PA-18-150 airplane, N9739P, sustained substantial damage during a forced landing at an off airport site located about 35 miles northwest of Skwentna, Alaska, at 62 degrees, 17 minutes north latitude, 151 degrees, 51 minutes west longitude. The solo certificated private pilot was not injured. The airplane was being operated as a visual flight rules (VFR) personal flight under Title 14, CFR Part 91, when the accident occurred. Visual meteorological conditions prevailed, and no flight plan was filed. The flight originated at Hilltop Airstrip, Chugiak, Alaska, about 1230.

During a telephone conversation with the National Transportation Safety Board investigator-in-charge on June 9, the pilot reported that while in cruise flight, about 200 feet above the ground, all engine power was lost. He said that the fuel selector valve was on the right fuel tank and that he intended to "run the right tank dry," then switch tanks. As the engine began to lose power, he switched the selector to the left fuel tank, but engine power was not immediately restored, and he selected a forced landing area on a sandy river bank. He added that during the landing roll, without applying the brakes, the airplane slowly nosed over. The airplane sustained substantial damage to the left wing lift strut, and rudder. The pilot stated that just prior to the accident flight he added hydraulic brake fluid to the brake system.

The pilot submitted a written report to the NTSB dated June 23. In his written report, the pilot indicated that a postaccident inspection revealed that the main wheels would not rotate. He wrote that as he bled the hydraulic brake system, both air and pressurized hydraulic fluid escaped from the bleed valve. After bleeding the hydraulic system, both wheels operated normally.

Aircraft

Registration
N9739P
Reported as
Piper PA-18-150
Category
Airplane
Serial number
18-7609010
Airframe hours
1,992
Engine
Lycoming O-320-A2B, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Michael C. Gardino
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 9, 1999 · 44 hours before
Departed
Hilltop A/S, AK
Destination
SKW · Skwentna, AK

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
59
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
2,775 total · 2,500 in this make and model · 2,775 as pilot in command · 35 in the last 90 days · 15 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 8 knots
Visibility
60 statute miles
Temperature
70 °F

FAA reports on this event · 1

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