SEA04LA084

NTSB accident investigation · Piper J4/E · Bigfork, MT · May 18, 2004

Accident · No injuriesLimited investigationFinal report
Date
May 17, 2004, 19:22 local (May 18, 2004, 01:22 UTC)
Place
Bigfork, MT
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N37982Piper J4/E
Weather
Visual (VMC) · Day
Status
Completed · report October 28, 2004
Report
Approved by Office Director
Parties
FAA - Helena FSDO
FAA report
20040517035509A
Case key
59231

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 due to fuel exhaustion while in cruise flight as a result of inadequate preflight planning / preparation. Factors contributing to the accident were the short landing field and trees.

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 powerCruise
Fluid,fuel - exhaustionCause
In-flight planning/decision - inadequatePilot in commandCause
Forced landingDescent - emergency
On ground/water encounter with terrain/waterEmergency landing
Terrain condition - short runway/landing areaFactor
Object - tree(s)Factor
Nose overLanding - roll

Analysis

The pilot reported that while returning to land at the departure airport, the engine began to "surge". The pilot continued towards the airport but was not able to maintain altitude or establish visual contact with the airport due to terrain. The pilot further reported that since he was unable to reach the airport, he turned approximately 180-degrees and initiated a forced landing in a field. During the landing roll the pilot, in an attempt to avoid running into trees, applied the brakes "aggressively" which resulted in a nose over. In a telephone conversation and subsequent written statement, the pilot reported, "I am convinced the engine quit running because of fuel starvation." He related that the airplane had been "topped" three days earlier and had been flown two hours previous to the day of the accident. On the day of the accident he flew for about an hour. He further revealed that he was aware that the wing tank was empty because he had observed "bubbles" in the fuel sight gauge, which extends out the bottom of the wing tank. The pilot also reported that the airplane was equipped with one 18-gallon wing tank, and a 7-gallon header tank. Post accident examination of the aircraft by maintenance personnel from Discount Aircraft Salvage, found all engine controls to be functioning properly and approximately one tablespoon of fuel was drained from the fuel gascolator. After adding approximately one gallon of fuel to the header tank, the engine was started and ran smoothly with no malfunction or failures noted.

Factual narrative

On May 17, 2004, at about 1922 mountain daylight time, a Piper J4/E, N37982, registered to and being operated by the pilot as a 14 CFR Part 91 personal flight, experienced an un-commanded reduction of engine power. The pilot initiated a forced landing in a field about one-half of a mile north of Ferndale Airfield, Bigfork, Montana. Although the initial landing was uneventful the rollout resulted in a nose over. The aircraft was substantially damaged and the airline transport pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed and no flight plan had been filed. The flight departed Ferndale, Montana, about one hour prior to the accident.

In a telephone conversation and subsequent written statement, the pilot reported that while returning to land at the airport, the engine began to "surge". Carburetor heat was applied with no effect. The pilot continued towards the airport, but was not able to maintain altitude or establish visual contact with the airport due to terrain. The pilot further reported that since he was unable to reach the airport, he turned approximately 180-degrees and initiated a forced landing in a field. During the landing roll the pilot, in an attempt to avoid running into trees, applied the brakes "aggressively" which resulted in a nose over.

During a follow-up telephone conversation the pilot reported, "I am convinced the engine quit running because of fuel starvation." He related that the airplane had been "topped" three days earlier and had been flown two hours previous to the day of the accident. On the day of the accident he flew for about an hour. He further revealed that he was aware that the wing tank was empty because he had observed "bubbles" in the fuel sight gauge, which extends out the bottom of the wing tank. The pilot also reported that the airplane was equipped with one 18-gallon wing tank, and a 7-gallon header tank.

Post accident examination of the aircraft by maintenance personnel from Discount Aircraft Salvage, found all engine controls to be functioning properly and approximately one tablespoon of fuel was drained from the fuel gascolator. After adding approximately one gallon of fuel to the header tank, the engine was started and ran smoothly with no malfunction or failures noted.

Aircraft

Registration
N37982
Reported as
Piper J4/E
Category
Airplane
Serial number
4-1501
Airframe hours
2,050
Engine
Continental C85-12, 85 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
David E Flatter
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 27, 2003 · 30 hours before
Departed
K53U · Bigfork, MT
Destination
K53U · Bigfork, MT
Airport
53U · Ferndale Airfield

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
71
Injuries
None
Certificates
Airline transport, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Last flight review
July 8, 2002
Seat
Left
Flight hours
30,000 total · 65 in this make and model · 20,000 as pilot in command · 6 in the last 90 days · 6 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 8 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F

FAA reports on this event · 1

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