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NTSB Report
March 6, 1990 · Air Tractor AT-301 · N23509
Rolling Fork, MS
Overview
Report Status
Probable Cause
Event Type
Accident
Date
March 6, 1990
Injury Outcomes
No injuries (1 uninjured)
Location
Rolling Fork, MS
Aircraft
Air Tractor AT-301
Tail Number
N23509
Operator
Nicks Flying Service
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MIA90LA083
WHILE ON SHORT FINAL, THE PLT WAS UNABLE TO CONTROL THE ACFT ABOUT THE LONGITUDINAL AXIS. THE BANK CONTINUED UNTIL THE ACFT IMPACTED THE GROUND & CAME TO REST INVERTED. EXAM OF THE ACFT REVEALED THAT THE LEFT AILERON SEPARATED UPWARD IN-FLT. THE THREE BOLTS & SELF LOCKING NUTS USED TO SECURE IT WERE NOT LOCATED. THERE WAS NO DAMAGE TO THE AILERON ATTACH ARMS UNDER THE WING NOR WAS THERE DAMAGE TO THE AILERON'S ATTACH PIONTS. THE AILERON PUSH-PULL ROD WAS EXAMINED & WAS FOUND TO HAVE FAILED DUE TO OVER LOAD. AN ANNUAL INSPN WAS PERFORMED 5 DAYS EARLIER, BUT THE AILERON WAS NOT REMOVED. THE ACFT LOGBOOK DID NOT CONTAIN AN ENTRY INDICATING THAT THE AILERON WAS REMOVED.
NTSB Probable Cause
THE IN-FLIGHT SEPARATION OF THE LEFT AILERON DUE TO IMPROPER MAINTENANCE PROCEDURES AND AN INADEQUATE AIRCRAFT PREFLIGHT.
Full Narrative
WHILE ON SHORT FINAL, THE PLT WAS UNABLE TO CONTROL THE ACFT ABOUT THE LONGITUDINAL AXIS. THE BANK CONTINUED UNTIL THE ACFT IMPACTED THE GROUND & CAME TO REST INVERTED. EXAM OF THE ACFT REVEALED THAT THE LEFT AILERON SEPARATED UPWARD IN-FLT. THE THREE BOLTS & SELF LOCKING NUTS USED TO SECURE IT WERE NOT LOCATED. THERE WAS NO DAMAGE TO THE AILERON ATTACH ARMS UNDER THE WING NOR WAS THERE DAMAGE TO THE AILERON'S ATTACH PIONTS. THE AILERON PUSH-PULL ROD WAS EXAMINED & WAS FOUND TO HAVE FAILED DUE TO OVER LOAD. AN ANNUAL INSPN WAS PERFORMED 5 DAYS EARLIER, BUT THE AILERON WAS NOT REMOVED. THE ACFT LOGBOOK DID NOT CONTAIN AN ENTRY INDICATING THAT THE AILERON WAS REMOVED.
Flight
Event TypeAccident
Event Time09:30 CST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAir Tractor AT-301
Tail NumberN23509
Aircraft CategoryAir
DamageSubstantial
OperatorNicks Flying Service
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R-1340 · Reciprocating · 600
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 29 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind50° @ 4 kt
Visibility10 sm
CeilingBroken clouds 20000 ft
Temperature / Dew Point66 F / 45 C
Altimeter30.00 inHg
Observation Time16:00
Weather SourceWFAC