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NTSB Report
April 29, 1993 · Grumman G-164A · N9696
Hamilton, AL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
April 29, 1993
Injury Outcomes
1 injury (1 minor injury)
Location
Hamilton, AL
Aircraft
Grumman G-164A
Tail Number
N9696
Operator
Coates Flying Service
Injuries
Minor
Aircraft Damage
Destroyed
NTSB Number
ATL93LA084
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.
NTSB 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.
Full Narrative
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.
Flight
Event TypeAccident
Event Time13:35 CDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftGrumman G-164A
Tail NumberN9696
Aircraft CategoryAir
DamageDestroyed
OperatorCoates Flying Service
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R-1340 · Reciprocating · 600
Seats1
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 41 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind170° @ 11 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point46
Altimeter30.00 inHg
Observation Time19:56
Weather SourceWFAC