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NTSB Report
April 25, 1984 · Cessna 150M · N45387
San Antonio, TX
Overview
Report Status
Preliminary report
Event Type
Accident
Date
April 25, 1984
Injury Outcomes
No injuries (1 uninjured)
Location
San Antonio, TX
Aircraft
Cessna 150M
Tail Number
N45387
Injuries
None
Aircraft Damage
Substantial
NTSB Number
FTW84LA212
WHILE RETURNING TO ARPT THE PILOT EXPERIENCED A ROUGH RUNNING ENG WITH A DROP IN RPM. THERE WAS INSUFFICIENT POWER TO MAINTAIN FLT AND AN EMERGENCY LANDING WAS MADE ON A HIGHWAY. THE ACFT WAS DAMAGED DURING THE HARD LANDING. AN EXAM OF THE ENG REVEALED THAT THE #1 ROD ASSEMBLY HAD FAILED. THERE WAS EVIDENCE OF HIGH OIL CONSUMPTION. ONLY ABOUT 1 PINT OF OIL WAS FOUND REMAINING. THE 2ND RING ON PISTONS 2, 3 & 4 WERE OIL SCRAPER RINGS. THE 1ST AND 2ND RINGS ON EACH PISTON SHOULD HAVE BEEN COMPRESSION RINGS. ALSO, THERE WAS EVIDENCE OF OVERHEATING & THE #2, #3 & #4 ROD TO CRANKSHAFT BEARINGS WERE PITTED & GALLED.
Full Narrative
WHILE RETURNING TO ARPT THE PILOT EXPERIENCED A ROUGH RUNNING ENG WITH A DROP IN RPM. THERE WAS INSUFFICIENT POWER TO MAINTAIN FLT AND AN EMERGENCY LANDING WAS MADE ON A HIGHWAY. THE ACFT WAS DAMAGED DURING THE HARD LANDING. AN EXAM OF THE ENG REVEALED THAT THE #1 ROD ASSEMBLY HAD FAILED. THERE WAS EVIDENCE OF HIGH OIL CONSUMPTION. ONLY ABOUT 1 PINT OF OIL WAS FOUND REMAINING. THE 2ND RING ON PISTONS 2, 3 & 4 WERE OIL SCRAPER RINGS. THE 1ST AND 2ND RINGS ON EACH PISTON SHOULD HAVE BEEN COMPRESSION RINGS. ALSO, THERE WAS EVIDENCE OF OVERHEATING & THE #2, #3 & #4 ROD TO CRANKSHAFT BEARINGS WERE PITTED & GALLED.
Flight
Event TypeAccident
Event Time21:00 CST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 150M
Tail NumberN45387
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-200-A · Reciprocating · 100
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 54 · Second Class
Conditions
ConditionsVMC
LightBright Night
Wind140° @ 14 kt, gusting 23 kt
Visibility7 sm
CeilingNone
Temperature / Dew Point48
Altimeter29.00 inHg
Weather SourcePILO