LAX02LA125

NTSB accident investigation · Schweizer G-164B · Dixon, CA · March 7, 2002

Accident · No injuriesLimited investigationFinal report
Date
March 7, 2002, 12:17 local (20:17 UTC)
Place
Dixon, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N48631Schweizer G-164B
Weather
Visual (VMC) · Day
Status
Completed · report November 25, 2003
Report
Approved by Office Director
Parties
FAA FSDO
FAA report
20020307010689A
Case key
54466

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 lost directional control due to the unsuitable landing area. A contributing factor was the muddy runway condition.

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.

Loss of control - on ground/waterLanding - roll
Unsuitable terrain or takeoff/landing/taxi area - encounteredPilot in commandCause
Terrain condition - muddyFactor
Directional control - not maintainedPilot in commandCause
Weather condition - tailwind

Analysis

The airplane veered off the runway during landing and came to rest inverted. The pilot had completed several flights using this runway earlier that day. To avoid mud puddles, he landed off of the runway center line. The right main gear grabbed into the soft dirt and the airplane departed the runway. During the accident landing there was a quartering tailwind.

Factual narrative

On March 7, 2002, at 1217 Pacific standard time, a Schweizer G-164B, N48631, veered off a dirt strip and overturned after landing near Dixon, California. The commercial pilot/owner was operating the airplane under the provisions of 14 CFR Part 137. The pilot, the sole occupant, was not injured; the airplane sustained substantial damage. The aerial application flight departed from the strip about 1200. Day visual meteorological conditions prevailed, and no flight plan had been filed. The incident was upgraded to an accident on April 4, 2002.

The pilot stated he had completed several flights that morning from a primarily north-south dirt strip in the middle of a wheat field. He had been taking off and landing to the north with a quartering tailwind from the southwest. Gusty winds and showers had been passing through the area all morning and the strip had ruts and puddles. After his third turn, he landed to the south, but the airplane got stuck in a mud puddle, and his crew pulled the airplane out. On the next flight he elected to depart to the north.

The pilot completed two more load cycles successfully by departing and landing to the north. On the accident landing, he placed the left main landing gear in the center of the strip and the right main landing gear near the edge of the strip, which was soft and wet. The wheel grabbed into the soft dirt, and the airplane veered to the right into the wheat field. The airplane overturned, which resulted in substantial damage to the wings and empennage.

Aircraft

Registration
N48631
Reported as
Schweizer G-164B
Category
Airplane
Serial number
G4B
Engine
Pratt & Whitney R1340, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Robert W. Zuber
Airworthiness certificate
Special, Restricted (Special)
Departed
Dixon, CA

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
27
Injuries
None
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Last flight review
May 4, 2001
Seat
Center
Flight hours
1,640 total · 706 in this make and model · 1,438 as pilot in command · 143 in the last 90 days · 101 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 11 knots, gusting 17
Visibility
10 statute miles
Lowest ceiling
1,800 ft broken
Temperature
55 °F, dew point 52 °F
Altimeter
29.82 inHg
Observed at
VCB

Docket · 1

The files NTSB released with the investigation on August 19, 2003, on NTSB’s docket system: statements, records, photos and specialists’ reports. 348 KB 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.