WPR23LA120

NTSB accident investigation · Grumman Acft ENG Cor-Schweizer G-164B · Vernalis, CA · March 3, 2023

Accident · Serious injuriesClass 4 · LimitedFinal report
Date
March 3, 2023, 12:30 local (20:30 UTC)
Place
Vernalis, CA · 2454 Orchard Rd, Vernalis CA
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N48492Grumman Acft ENG Cor-Schweizer G-164B
Defining event
Maneuvering-low-alt flying: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Western Pacific Region
Parties
Oakland FSDO
FAA report
20230303003019A
Case key
106836

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot’s failure to maintain clearance from a power line during a low-level aerial application flight.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Object/animal/substance: wireEnvironmental issues › Physical environment · Effect on equipmentGrumman Acft ENG Cor-Schweizer G-164B: 8 casesAll aircraft: 588 cases
Object/animal/substance: wireEnvironmental issues › Physical environment · Awareness of conditionGrumman Acft ENG Cor-Schweizer G-164B: 8 casesAll aircraft: 588 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot reported he was spraying near power lines during an aerial application flight. He made several passes beneath a power line; however, during a subsequent pass, the pilot became distracted and struck the power line. The airplane impacted the ground and was destroyed by post-crash fire. The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operations.

Aircraft

Registration
N48492
Reported as
Grumman Acft ENG Cor-Schweizer G-164B
Category
Airplane
Serial number
47B
Built
1976
Engine
Pratt & Whitney 1340/an-1, 600 hp, turbo prop
Damage
Substantial damage
Fire
On-Ground
Flight
Aerial application · Part 137
Registered owner
D C Applicator
Airworthiness certificate
Special, Restricted (Special)
Departed
CA67 · Vernalis, CA
Equipment
Stall warning system

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
60
Injuries
Serious
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
April 22, 2021
Seat
Single
Restraint
4-point
Flight hours
17,000 total · 16,000 in this make and model · 15,000 as pilot in command · 50 in the last 90 days · 30 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
55 °F, dew point 39 °F
Altimeter
30.01 inHg
Observed at
KMOD, 13 nm away
METAR
KMOD 032053Z 27009KT 10SM CLR 13/04 A3001 RMK AO2 SLP161 T01330044 58026

Docket · 3

The files NTSB released with the investigation on June 23, 2023, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.7 MB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.