LAX02LA232

NTSB accident investigation · Grumman-Schweizer G-164B · Knights Landing, CA · July 20, 2002

Accident · No injuriesLimited investigationFinal report
Date
July 20, 2002, 08:00 local (15:00 UTC)
Place
Knights Landing, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N6794KGrumman-Schweizer G-164B
Weather
Visual (VMC) · Day
Status
Completed · report September 29, 2004
Report
Approved by Office Director
Parties
Federal Aviation Administration
Case key
55277

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

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Probable cause

The pilot's inadequate visual lookout, resulting in an in-flight collision with wires.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight collision with objectManeuvering - aerial application
Visual lookout - inadequatePilot in commandCause
Object - wire,transmission
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - crop

Analysis

The airplane collided with power lines while maneuvering during an aerial application flight. Thereafter, the airplane crashed into a field. The impacted line was 33 feet above ground level. The pilot indicated that he had observed some of the lines, but not the line with the lowest elevation.

Factual narrative

On July 20, 2002 about 0800 Pacific daylight time, a Grumman-Schweizer G-164B, N6794K, collided with power lines and crashed into a rice field approximately 8 miles northwest of Knights Landing, California. The accident occurred while the pilot was maneuvering during an aerial application flight. The airplane was substantially damaged, and the commercial pilot was not injured. The airplane was operated by Farm Air Flying Service, Inc., Verona, California, under the provisions of 14 CFR Part 137. Visual meteorological conditions prevailed. The flight originated from Verona approximately 0730.

According to responding sheriff officers and representatives from the Pacific Gas & Electric Company, the airplane came to rest upside down in a rice field after colliding with 12 KV power distribution lines. The elevation of the impacted upper line (conductor) was about 33 feet above ground level. About a 4/10-mile-long span of lines and five supporting poles were downed during the collision sequence.

The pilot reported in his completed "Aircraft Accident Report," that he had observed the power lines and attempted to fly beneath them. However, he did not notice the lowest elevation line that his airplane contacted.

Aircraft

Registration
N6794K
Reported as
Grumman-Schweizer G-164B
Category
Airplane
Serial number
488B
Airframe hours
11,648
Engine
Pratt & Whitney R-985-AN1, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Farm Air Flying Service, Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · July 17, 2002 · 10 hours before
Departed
2Q0 · Verona, CA
Destination
2Q0

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
42
Injuries
None
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
December 18, 2001
Seat
Single
Flight hours
8,100 total · 4,500 in this make and model · 8,000 as pilot in command · 350 in the last 90 days · 125 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
110° at 4 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
66 °F, dew point 57 °F
Altimeter
29.81 inHg
Observed at
SMF, 15 nm away

Docket · 1

The files NTSB released with the investigation on July 26, 2004, on NTSB’s docket system: statements, records, photos and specialists’ reports. 275 KB in all.