NYC96LA173

NTSB accident investigation · Lake LA-250 · Hamilton Twp, NJ · August 25, 1996

Accident · No injuriesLimited investigationFinal report
Date
August 25, 1996, 18:00 local (22:00 UTC)
Place
Hamilton Twp, NJ
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N8405FLake LA-250
Weather
Visual (VMC) · Day
Status
Completed · report May 23, 1997
Report
Approved by Office Director
FAA report
19960825024049A
Case key
39234

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

A complete loss of engine power due to inadequate maintenance that contributed to a loose fuel line fitting, a fuel leak and subsequent fuel starvation. The uneven terrain was a factor.

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 powerDescent - normal
Fuel system,line fitting - looseCause
Maintenance - inadequateOther maintenance personnelCause
Fluid,fuel - leakCause
Fluid,fuel - starvationCause
Forced landingEmergency landing
Main gear collapsedLanding - roll
Terrain condition - rough/unevenFactor
Landing gear,main gear - overload

Analysis

The airplane was at 2,000 feet when a complete loss of engine power occurred. The pilot attempted to restart the engine without success, and performed a forced landing to a farm road where the landing gear collapsed. About 30 gallons of fuel remained in the airplane's fuel tanks. Examination of the wreckage revealed that there was no external damage to the engine. When the battery was activated, and the electric fuel pump was turned on, fuel leaked from the main fuel line connection at the fuel injection manifold. Examination of the fuel line revealed that the fuel line nut was loose. When the nut was turned by finger pressure, it turned two flats (about 1/3 turn) before any resistance was noted. After the fuel line nut was tightened, an engine start and run-up was successfully completed. During the last annual inspection, in March 1996, two engine cylinders were replaced. Also, the fuel injectors were cleaned, and a fuel injector line Airworthiness Directive was complied with. The airplane had been flown about 37 hours since the annual inspection.

Factual narrative

On August 25, 1996, at 1800 eastern daylight time, a Lake LA-250, N8405F, was substantially damaged during a forced landing near Hamilton Township, New Jersey. The certificated airline transport pilot and passenger were not injured. Visual meteorological conditions prevailed for the flight that originated at Montgomery, New York, about 1720. No flight plan had been filed for the flight conducted under 14 CFR Part 91.

In the pilot's statement, he said that the airplane was at approximately 2,000 feet when a complete loss of engine power occurred. He further stated that he attempted to restart the engine without success. He then performed a forced landing to a farm road where the landing gear collapsed. About 30 gallons of fuel remained in the airplane's fuel tanks.

Examination of the airplane by the NTSB Investigator revealed that there was no external damage to the engine. When the battery was activated, and the electric fuel pump was turned on, fuel leaked from the main fuel line connection at the fuel injection manifold. Examination of the fuel line revealed that the line nut was loose. When the nut was turned by finger pressure, it turned two flats (about 1/3 turn) before any resistance was noted. After the line nut was tightened, an engine start and run-up was successfully completed.

A review of the airplane's maintenance records revealed that during the last annual inspection, in March 1996, two engine cylinders were replaced. Also, the fuel injectors were cleaned, and a fuel injector line Airworthiness Directive was complied with. The airplane had been flown about 37 hours since the annual inspection.

Aircraft

Registration
N8405F
Reported as
Lake LA-250
Category
Airplane
Serial number
56
Airframe hours
971
Engine
Lycoming IO-540, 250 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Manhattan Management Corp
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 17, 1996 · 37 hours before
Departed
MGJ · Montgomery, NY
Destination
7MY · Mount Holly, NJ

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
59
Certificates
Private, Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine land, Multi-engine sea, Single-engine sea
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
2,940 total · 155 in this make and model · 2,900 as pilot in command · 16 in the last 90 days · 8 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
260° at 12 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
84 °F

FAA reports on this event · 1

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