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NTSB Report
June 13, 2010 · Grumman Acft Eng Cor-Schweizer G-164B · N6726Q
Courtland, CA
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
June 13, 2010
Injury Outcomes
1 injury (1 serious injury)
Location
Courtland, CA
Aircraft
Grumman Acft Eng Cor-Schweizer G-164B
Tail Number
N6726Q
Operator
Walter Avery
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
WPR10CA289
The pilot reported that during an aerial application flight he was established and stable on an east-to-west spray pass. He recalls checking the pump pressure gauge for an indication of an empty load when he felt and heard a “significant slam” and felt a grinding sensation. The airplane had impacted level terrain and came to rest upside down. The airplane sustained substantial damage to both wings and the tail assembly. The pilot reported that there were no known mechanical malfunctions or failures with the aircraft prior to the accident.
NTSB Probable Cause
Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Altitude-Not attained/maintained - C
Full Narrative
The pilot reported that during an aerial application flight he was established and stable on an east-to-west spray pass. He recalls checking the pump pressure gauge for an indication of an empty load when he felt and heard a “significant slam” and felt a grinding sensation. The airplane had impacted level terrain and came to rest upside down. The airplane sustained substantial damage to both wings and the tail assembly. The pilot reported that there were no known mechanical malfunctions or failures with the aircraft prior to the accident.
Flight
Event TypeAccident
Event Time10:47 PDT
Nearest Airport0nm
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftGrumman Acft Eng Cor-Schweizer G-164B
Tail NumberN6726Q
Aircraft CategoryAir
DamageSubstantial
OperatorWalter Avery
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R-1340 · Reciprocating · 600
Seats1
People & Injuries
Injury Summary1 injury (1 serious injury)
Fatal0
Serious1
Minor0
Uninjured0
Total1
Crew 1Age 52 · Second Class · Serious
Conditions
ConditionsVMC
LightDaylight
Wind350° @ 6 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point48
Altimeter30.00 inHg
Weather SourceWFAC