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NTSB Report
March 8, 1991 · Cessna 152 · N69116
Tucson, AZ
Overview
Report Status
Probable Cause
Event Type
Accident
Date
March 8, 1991
Injury Outcomes
No injuries (1 uninjured)
Location
Tucson, AZ
Aircraft
Cessna 152
Tail Number
N69116
Operator
Double Eagle Aviation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX91LA126
THE PILOT OF A CESSNA 152 EXPERIENCED ENGINE FAILURE DURING PILOT TRAINING MANEUVERS. THE STUDENT PILOT STATED THE ENGINE JUST 'FROZE.' EXAMINATION REVEALED THAT A CRANKSHAFT BEARING ROTATED AFFECTING THE OIL SUPPLY TO NUMBER 3 AND 4 CONNECTING RODS. NUMBER 3 CONNECTING ROD FAILED. EXAMINATION OF THE ENGINE LOG BOOK REVEALED THAT THE ENGINE HAD ACCRUED 2477.4 HOURS SINCE MAJOR OVERHAUL. THE FACTORY RECOMMENDED TIME BETWEEN OVERHAUL WAS 2400 HOURS.
NTSB Probable Cause
ENGINE FAILURE DUE TO OIL STARVATION CAUSED BY A ROTATION OF THE MAIN BEARING. A FACTOR IN THE ACCIDENT WAS THE FAILURE OF THE OPERATOR MAINTENANCE PERSONNEL TO ACCOMPLISH AN ENGINE OVERHAUL WITHIN THE INTERVAL SPECIFIED BY THE MANUFACTURER.
Full Narrative
THE PILOT OF A CESSNA 152 EXPERIENCED ENGINE FAILURE DURING PILOT TRAINING MANEUVERS. THE STUDENT PILOT STATED THE ENGINE JUST 'FROZE.' EXAMINATION REVEALED THAT A CRANKSHAFT BEARING ROTATED AFFECTING THE OIL SUPPLY TO NUMBER 3 AND 4 CONNECTING RODS. NUMBER 3 CONNECTING ROD FAILED. EXAMINATION OF THE ENGINE LOG BOOK REVEALED THAT THE ENGINE HAD ACCRUED 2477.4 HOURS SINCE MAJOR OVERHAUL. THE FACTORY RECOMMENDED TIME BETWEEN OVERHAUL WAS 2400 HOURS.
Flight
Event TypeAccident
Event Time08:45 MST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 152
Tail NumberN69116
Aircraft CategoryAir
DamageSubstantial
OperatorDouble Eagle Aviation
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-235-L2C · Reciprocating · 108
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 60 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind100° @ 6 kt
Visibility40 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Observation Time15:45
Weather SourceWFAC