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NTSB Report
June 27, 1991 · Piper PA 28-140 · N1898J
Flagstaff, AZ
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 27, 1991
Injury Outcomes
1 injury (1 minor injury)
Location
Flagstaff, AZ
Aircraft
Piper PA 28-140
Tail Number
N1898J
Operator
Henry N Halle
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
LAX91LA279
A PIPER PA 28-140 COLLIDED WITH TREES AFTER A LOSS OF ENGINE POWER. THE AIRPLANE WRECKAGE WAS EXAMINED BY THE FAA. SIX OF THE EIGHT SPARK PLUGS EXHIBITED SOOTY DARK ELECTRODES. ACCORDING TO THE ENGINE MANUFACTURER, THE ELECTRODE APPEARANCE WAS INDICATIVE OF A RICH MIXTURE. EXAMINATION OF THE AIRPLANE'S FUEL PRIMER REVEALED IT WAS UNLOCKED. ACCORDING TO THE ENGINE MANUFACTURER THIS COULD RESULT IN AN OVER PRIMED OR RICH MIXTURE. THE RICH MIXTURE AND HIGH ALTITUDE COULD RESULT IN A LOSS OF ENGINE POWER.
NTSB Probable Cause
FAILURE OF THE PILOT-IN-COMMAND TO PROPERLY LOCK THE ENGINE PRIMER CONTROL WHICH RESULTED IN AN OVER RICH FUEL TO AIR MIXTURE AND SUBSEQUENT LOSS OF ENGINE POWER.
Full Narrative
A PIPER PA 28-140 COLLIDED WITH TREES AFTER A LOSS OF ENGINE POWER. THE AIRPLANE WRECKAGE WAS EXAMINED BY THE FAA. SIX OF THE EIGHT SPARK PLUGS EXHIBITED SOOTY DARK ELECTRODES. ACCORDING TO THE ENGINE MANUFACTURER, THE ELECTRODE APPEARANCE WAS INDICATIVE OF A RICH MIXTURE. EXAMINATION OF THE AIRPLANE'S FUEL PRIMER REVEALED IT WAS UNLOCKED. ACCORDING TO THE ENGINE MANUFACTURER THIS COULD RESULT IN AN OVER PRIMED OR RICH MIXTURE. THE RICH MIXTURE AND HIGH ALTITUDE COULD RESULT IN A LOSS OF ENGINE POWER.
Flight
Event TypeAccident
Event Time13:15 MST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA 28-140
Tail NumberN1898J
Aircraft CategoryAir
DamageSubstantial
OperatorHenry N Halle
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-E2A · Reciprocating · 150
Seats4
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 43 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind220° @ 14 kt
Visibility20 sm
CeilingNone
Temperature / Dew Point25 C
Altimeter30.00 inHg
Observation Time19:50
Weather SourceWFAC