ANC96LA060

NTSB accident investigation · Piper PA-18 · Kasilof, AK · April 28, 1996

Accident · No injuriesLimited investigationFinal report
Date
April 28, 1996, 15:00 local (23:00 UTC)
Place
Kasilof, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N1930APiper PA-18
Weather
Visual (VMC) · Day
Status
Completed · report February 28, 1997
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19960428008899A
Case key
2831

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

fuel starvation due to a kinked fuel supply line from the left main tank, and the pilot's improper rebuild/remanufacture of the airplane. A smaller than standard fuel line from the fuel strainer to the carburetor, a smaller than standard fuel cap vent, and a lack of mechanic certification were factors in the accident.

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 powerTakeoff - initial climb
Fuel system,line - bentCause
Fuel system,line - restrictedFactor
Fuel system,vent - restrictedFactor
Fluid,fuel - starvationCause
Maintenance,rebuild/remanufacture - improperPilot in commandCause
Lack of certificationPilot in commandFactor
Forced landingEmergency landing after takeoff
In flight collision with objectEmergency landing after takeoff
Object - tree(s)

Analysis

The certificated private pilot was departing a private 2,000 feet long grass airstrip. Before departure, the pilot selected the left fuel tank. During the initial climb, the engine suddenly quit about 100 feet in the air. The pilot selected an emergency landing area, and the airplane collided with several trees during the landing. The pilot indicated that the remanufactured engine that he installed had accured 25 hours. The airplane had been rebuilt by the pilot, who was not a certificated airframe or powerplant mechanic. The pilot did not possess any airworthiness documentation for the airplane. A postaccident examination of the airplane revealed a kink in the fuel line from the left fuel tank. The fuel line from the fuel strainer to the carburetor was 1/4 inch in diameter. The standard size was 3/8 inch. The fuel caps on each tank were required to have a 3/8 inch vent line. The installed caps had a 1/4 inch vent.

Factual narrative

On April 28, 1996, about 1500 Alaska daylight time, a wheel equipped Piper PA-18, N1930A, collided with trees during a forced landing, about 5 miles northwest of Kasilof, Alaska. The airplane was being operated as a visual flight rules cross-country personal flight when the accident occurred. The airplane, operated by the pilot, sustained substantial damage. The certificated private pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed.

In a telephone interview with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), the pilot reported that he departed a private 2,000 feet long grass airstrip known as Doyle's strip. Prior to departure, the pilot selected the left fuel tank. During the initial climb, the engine suddenly quit about 100 feet in the air. The pilot selected an emergency landing area and collided with several trees during the landing. The airplane received damage to the wings, fuselage, and propeller. The pilot indicated that the remanufactured engine that he installed had accrued 25 hours.

The airplane was examined by a Federal Aviation Administration (FAA) airworthiness inspector from the Anchorage, Alaska, Flight Standards District Office (FSDO). The inspector reported that the airplane had been rebuilt by the pilot who is not a certificated airframe or powerplant mechanic. The pilot did not posses any airworthiness documentation for the airplane. The postaccident examination of the airplane revealed a kink in the fuel line from the left fuel tank. The fuel line from the fuel strainer to the carburetor was 1/4 inch in diameter. The standard size is 3/8 inch. The fuel caps on each tank are required to have a 3/8 inch vent line. The installed caps had a 1/4 inch vent.

Aircraft

Registration
N1930A
Reported as
Piper PA-18
Category
Airplane
Serial number
18-1768
Engine
Lycoming O-360-A4M, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Paul G. Isaak
Registered owner
Fred Moody
Destination
Soldotna, AK
Airport
Doyle'S Strip, runway 27, 3,000 × 150 ft, grass/turf

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
74
Certificate
Private
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
12,000 total

Weather

Conditions
Visual (VMC) · Day
Wind
350° at 9 knots
Visibility
60 statute miles
Lowest ceiling
9,000 ft broken
Temperature
45 °F
Altimeter
29.00 inHg
Observed at
ENA, 10 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 N1930A · 1

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