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NTSB Report
August 9, 1992 · Air Tractor AT-401 · N1547P
Parker, AZ
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 9, 1992
Injury Outcomes
No injuries (1 uninjured)
Location
Parker, AZ
Aircraft
Air Tractor AT-401
Tail Number
N1547P
Operator
Morris Gary & Connie
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX92LA338
THE PILOT WAS CONDUCTING AN AERIAL APPLICATION SWATH RUN WHEN 10 INCHES OF A PROPELLER BLADE SEPARATED. THE PILOT EXECUTED AN EMERGENCY LANDING. ON TOUCHDOWN, THE AIRCRAFT NOSED OVER AFTER COLLIDING WITH THE ROUGH/UNEVEN TERRAIN. A METALLURGICAL EXAMINATION OF PROPELLER BLADE DISCLOSED THE PRESENCE OF FATIGUE ACROSS 60% OF THE FRACTURED SURFACE. THE ORIGIN OF THE FATIGUE CENTERED ON A NOTCH OF A PREVIOUSLY REWORKED AREA. THE PROPELLER BLADE HAD ACCURED 273 FLIGHT HOURS SINCE IT WAS OVERHAULED.
NTSB Probable Cause
THE INADEQUATE OVERHAUL OF THE PROPELLER BLADE BY THE OVERHAUL FACILITY. CONTRIBUTING TO THIS ACCIDENT WAS THE ROUGH AND UNEVEN TERRAIN.
Full Narrative
THE PILOT WAS CONDUCTING AN AERIAL APPLICATION SWATH RUN WHEN 10 INCHES OF A PROPELLER BLADE SEPARATED. THE PILOT EXECUTED AN EMERGENCY LANDING. ON TOUCHDOWN, THE AIRCRAFT NOSED OVER AFTER COLLIDING WITH THE ROUGH/UNEVEN TERRAIN. A METALLURGICAL EXAMINATION OF PROPELLER BLADE DISCLOSED THE PRESENCE OF FATIGUE ACROSS 60% OF THE FRACTURED SURFACE. THE ORIGIN OF THE FATIGUE CENTERED ON A NOTCH OF A PREVIOUSLY REWORKED AREA. THE PROPELLER BLADE HAD ACCURED 273 FLIGHT HOURS SINCE IT WAS OVERHAULED.
Flight
Event TypeAccident
Event Time22:15 MST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAir Tractor AT-401
Tail NumberN1547P
Aircraft CategoryAir
DamageSubstantial
OperatorMorris Gary & Connie
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R-1340-AN1 · Reciprocating · 600
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 31 · Second Class
Conditions
ConditionsVMC
LightNr
Wind180° @ 5 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point10 C / 0 C
Altimeter29.00 inHg
Weather SourcePILO