ATL93LA084

NTSB accident investigation · Grumman G-164A · Hamilton, AL · April 29, 1993

Accident · Minor injuriesLimited investigationFinal report
Date
April 29, 1993, 13:35 local (18:35 UTC)
Place
Hamilton, AL
Injuries
1 minor
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N9696Grumman G-164A
Weather
Visual (VMC) · Day
Status
Completed · report October 13, 1993
Report
Approved by Office Director
FAA report
19930429011059A
Case key
8740

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 failure to properly calculate fuel consumption at an increased power setting, which resulted in fuel exhaustion and loss of engine power. Trees at the forced landing area were a factor 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 power(total) - nonmechanicalCruise - normal
Fluid,fuel - exhaustionCause
Fuel consumption calculations - inaccuratePilot in commandCause
Forced landingDescent - emergency
In flight collision with objectDescent - emergency
Object - tree(s)Factor
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The pilot reported that about one hour and forty two minutes into the ferry flight, the engine quit due to fuel exhaustion. The aircraft was force landed into forested area, where it collided with trees and terrain. The pilot calculated that there was about two hours and twenty minutes of fuel on board when the flight originated. The operator provided fuel burn data from previous flights, however this data was based on a ground speed of about 78 knots, with 28 inches manifold pressure and 2,000 RPM. The investigation revealed that the average ground speed during the accident flight was about 100 knots, which would have required a higher engine power setting. An examination of the aircraft wreckage revealed no evidence of a fuel leak.

Aircraft

Registration
N9696
Reported as
Grumman G-164A
Category
Airplane
Serial number
1229
Airframe hours
6,300
Engine
P&W R-1340, 600 horsepower, reciprocating
Damage
Destroyed
Flight
Ferry · Part 91
Operator
Coates Flying Service, Inc.
Registered owner
Coates Flying Service, Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · June 6, 1992 · 350 hours before
Departed
M28 · Hayti, MO

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
41
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Center
Flight hours
3,980 total · 2,900 in this make and model · 3,930 as pilot in command · 21 in the last 90 days · 6 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 11 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
75 °F, dew point 46 °F
Altimeter
30.00 inHg
Observed at
MSL, 40 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.