ERA16LA291

NTSB accident investigation · Luscombe 8 · Marlboro, NJ · August 13, 2016

Accident · Serious injuriesLimited investigationFinal report
Date
August 13, 2016, 12:03 local (16:03 UTC)
Place
Marlboro, NJ
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N71497Luscombe 8
Defining event
Enroute-cruise: Fuel exhaustion
Weather
Visual (VMC) · Day
Status
Completed · report July 8, 2019
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
Continental Motors, Inc., FAA/FSDO
FAA report
20160813024579A
Case key
93832

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

The pilot's inadequate in-flight fuel management, which resulted in fuel exhaustion and the subsequent total loss of engine power.

Findings · 4

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.

Use of equip/info: use of equip/systemPersonnel issues › Task performance · PilotLuscombe 8A: 8 casesAll aircraft: 1,391 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Fluid levelLuscombe 8A: 8 casesAll aircraft: 1,695 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Fluid managementLuscombe 8A: 8 casesAll aircraft: 1,695 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 private pilot was on a local personal flight and, after flying about 1.5 hours, the engine experienced a total loss of engine power that he could not restore. He maneuvered the airplane for a forced landing in a field, but the airplane impacted the ground in a nose- and left-wing-low attitude, which resulted in substantial damage to the airframe. Postaccident examination of the airplane revealed no fuel remaining in the intact fuel tank and only residual fuel remaining in the fuel strainer and carburetor. The glass face of the fuel tank quantity indicator gauge was scratched and cloudy. The examination revealed no evidence of preimpact failures or malfunctions of the engine or engine accessories that would have precluded normal operation. Thus, it is likely that the pilot did not adequately manage the fuel supply during flight, and the scratched and cloudy glass face of the fuel quantity indicator gauge may have led the pilot to misinterpret how much fuel was remaining.

Factual narrative

On August 13, 2016, about 1203 eastern daylight time, a Luscombe 8A, N71497, was substantially damaged during a forced landing in an open field near Marlboro, New Jersey. The private pilot sustained serious injuries. The airplane was being operated under the provisions of Title 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed at the time and no flight plan was filed. The local flight originated about 1 hour 30 minutes earlier from Old Bridge Airport (3N6), Old Bridge, New Jersey.The pilot stated to Federal Aviation Administration (FAA) personnel that the flight departed 3N6 with about 12 gallons of fuel and flew around the local area. While in cruise flight at 1,200 ft mean sea level, he reported the engine suddenly ceased producing power, and his attempts to restore engine power were unsuccessful. He maneuvered for a forced landing to a nearby racetrack but realized the flight path was too high. He then maneuvered for a forced landing in a nearby field, and while in a nose and left wing low attitude, the airplane impacted the ground. He further stated that the engine did not sputter, and he did apply carburetor heat, but that did not restore engine power. Examination of the accident site and airplane by the FAA inspector revealed no fuel remained in the un-breached fuel tank. The inlet fitting at the fuel strainer was broken off but no fuel leakage was noted. A stain on the ground near the engine was attributed to be oil from the breached oil tank. During recovery of the airplane, the fuel supply line from the fuel tank was cut and no fuel was noted in the line. Examination of the engine by a representative of the engine manufacturer with FAA oversight following recovery of the airplane revealed no evidence of preimpact failure or malfunction. The carburetor which was separated from the induction plenum but remained connected via the flexible hose from the fuel strainer and control cables was drained and found to contain about 1 or 2 teaspoons of fuel. The fuel strainer was found to contain about 2 tablespoons of fuel. The fuel tank quantity indicator glass was scratched and cloudy. There were no other reported issues with the fuel quantity indicating system.

Aircraft

Registration
N71497
Reported as
Luscombe 8 (A)
Category
Airplane
Serial number
2924
Built
1946
Airframe hours
3,698
Engine
Continental A65-8F, 65 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 8, 2016 · 16 hours before
Departed
3N6 · Old Bridge, NJ
Destination
3N6 · Old Bridge, NJ
Equipment
Handheld GPS

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
70
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
June 25, 2015
Seat
Left
Restraint
Lap only
Flight hours
531 total · 415 in this make and model · 531 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
220° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
93 °F, dew point 79 °F
Altimeter
29.94 inHg
Turbulence
Unknown
Observed at
BLM, 8 nm away

Docket · 9

The files NTSB released with the investigation on April 25, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.9 MB in all.

FAA reports on this event · 1

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