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NTSB Report
May 14, 1991 · Grumman G164B · N48658
Yuba City, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
May 14, 1991
Injury Outcomes
1 injury (1 minor injury)
Location
Yuba City, CA
Aircraft
Grumman G164B
Tail Number
N48658
Operator
Wagner Aviation
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
LAX91LA214
THE PILOT WAS CONDUCTING AN AERIAL APPLICATION FLIGHT. AS THE AIRPLANE NEARED THE COMPLETION OF A PROCEDURE TURNAROUND THE AIRPLANE BEGAN TO SHAKE VIOLENTLY. THE PILOT REDUCED ENGINE POWER AND LANDED IN A RICE FIELD. DURING THE LANDING ROLL THE PILOT OBSERVED A BERM AND APPLIED FULL BRAKING AND THE AIRPLANE NOSED OVER ONTO ITS BACK. EXAMINATION OF THE PROPELLER DISCLOSED THAT A 6 INCH SECTION OF THE TIP END OF ONE BLADE SEPARATED. THE FRACTURED AREA DISPLAYED FATIGUE STRIATION SIGNATURES.
NTSB Probable Cause
FATIGUE IN THE PROPELLER BLADE WHICH LED TO ITS ULTIMATE FAILURE. FACTORS RELATING TO THIS ACCIDENT WERE THE SOFT TERRAIN CONDITIONS ON WHICH THE AIRPLANE LANDED AND A BERM ACROSS THE AIRPLANE'S GROUND PATH.
Full Narrative
THE PILOT WAS CONDUCTING AN AERIAL APPLICATION FLIGHT. AS THE AIRPLANE NEARED THE COMPLETION OF A PROCEDURE TURNAROUND THE AIRPLANE BEGAN TO SHAKE VIOLENTLY. THE PILOT REDUCED ENGINE POWER AND LANDED IN A RICE FIELD. DURING THE LANDING ROLL THE PILOT OBSERVED A BERM AND APPLIED FULL BRAKING AND THE AIRPLANE NOSED OVER ONTO ITS BACK. EXAMINATION OF THE PROPELLER DISCLOSED THAT A 6 INCH SECTION OF THE TIP END OF ONE BLADE SEPARATED. THE FRACTURED AREA DISPLAYED FATIGUE STRIATION SIGNATURES.
Flight
Event TypeAccident
Event Time16:10 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftGrumman G164B
Tail NumberN48658
Aircraft CategoryAir
DamageSubstantial
OperatorWagner Aviation
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R1340AN1 · Reciprocating · 525
Seats1
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 55 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind340° @ 10 kt
Visibility95 sm
CeilingNone
Temperature / Dew Point48
Altimeter29.00 inHg
Observation Time22:56
Weather SourceWFAC