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NTSB Report
February 6, 1991 · Cessna 150M · N9433U
Buckeye, AZ
Overview
Report Status
Probable Cause
Event Type
Accident
Date
February 6, 1991
Injury Outcomes
No injuries (2 uninjured)
Location
Buckeye, AZ
Aircraft
Cessna 150M
Tail Number
N9433U
Operator
Action Aviation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX91LA092
THE CFI AND NONCERTIFICATED STUDENT PILOT DEPARTED GOODYEAR, AZ, ON A DUAL INSTRUCTIONAL FLIGHT. WHILE PRACTICING GROUND REFERENCE MANEUVERS THE AIRPLANE SUSTAINED A LOSS OF AILERON CONTROL. THE CFI EXECUTED A FORCED LANDING INTO A DRYWASH. THE AIRPLANE COLLIDED WITH A BERM DURING THE LANDING ROLL. THE WRECKAGE EXAMINATION DISCLOSED THAT ONE OF THE AILERON CABLES DISCONNECTED FROM THE BELLCRANK. THE CONNECTING NUT AND BOLT WAS NOT LOCATED. ANOTHER BOLT, ALTHOUGH ATTACHED TO THE BELLCRANK, DID NOT CONTAIN A CORRESPONDING NUT. BOTH WINGS WERE REINSTALLED ON THE AIRPLANE ABOUT 22 MONTHS BEFORE THE ACCIDENT. THE LAST ANNUAL INSPECTION WAS PERFORMED ABOUT 3 MONTHS BEFORE THE ACCIDENT. THE SAME MECHANIC PERFORMED THE REINSTALLATION OF BOTH WINGS AND THE LAST ANNUAL INSPECTION.
NTSB Probable Cause
THAT MAINTENANCE PERSONNEL FAILED TO PROPERLY INSTALL THE WINGS BY NOT RECONNECTING THE BOLTS AT THE BELLCRANK AND PERFORMED AN INADEQUATE ANNUAL INSPECTION.
Full Narrative
THE CFI AND NONCERTIFICATED STUDENT PILOT DEPARTED GOODYEAR, AZ, ON A DUAL INSTRUCTIONAL FLIGHT. WHILE PRACTICING GROUND REFERENCE MANEUVERS THE AIRPLANE SUSTAINED A LOSS OF AILERON CONTROL. THE CFI EXECUTED A FORCED LANDING INTO A DRYWASH. THE AIRPLANE COLLIDED WITH A BERM DURING THE LANDING ROLL. THE WRECKAGE EXAMINATION DISCLOSED THAT ONE OF THE AILERON CABLES DISCONNECTED FROM THE BELLCRANK. THE CONNECTING NUT AND BOLT WAS NOT LOCATED. ANOTHER BOLT, ALTHOUGH ATTACHED TO THE BELLCRANK, DID NOT CONTAIN A CORRESPONDING NUT. BOTH WINGS WERE REINSTALLED ON THE AIRPLANE ABOUT 22 MONTHS BEFORE THE ACCIDENT. THE LAST ANNUAL INSPECTION WAS PERFORMED ABOUT 3 MONTHS BEFORE THE ACCIDENT. THE SAME MECHANIC PERFORMED THE REINSTALLATION OF BOTH WINGS AND THE LAST ANNUAL INSPECTION.
Flight
Event TypeAccident
Event Time10:31 MST
Nearest Airport0nm N
Runway0
Flight Plan FiledUnknown
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 150M
Tail NumberN9433U
Aircraft CategoryAir
DamageSubstantial
OperatorAction Aviation
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-200-A · Reciprocating · 100
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 28 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind80° @ 20 kt
Visibility60 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO