WPR19LA039

NTSB accident investigation · Beech 36 · Los Banos, CA · December 6, 2018

Accident · No injuriesClass 3 · LimitedFinal report
Date
December 6, 2018, 12:30 local (20:30 UTC)
Place
Los Banos, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Unknown
Aircraft
N361TCBeech 36
Defining event
Unknown: Unknown or undetermined
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20181206023309A
Case key
98742

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

A partial loss of engine power for reasons that could not be determined based on the available information.

Findings · 1

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.

Not determinedNot determined › Not determined · Unknown/Not determinedBeech A36TC: 5 casesAll aircraft: 2,247 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

After almost 1 hour of flight, the pilot turned onto the left base leg of the traffic pattern at the destination airport, where he intended to practice takeoffs and landings. During the turn, the engine began to sputter. The pilot turned toward the runway and tried to maintain clearance from trees located on the outside of the airport perimeter fence; however, the propeller and landing gear impacted the fence. The airplane came to rest upright about 5 ft from the runway edge, resulting in substantial damage. Postaccident examination of the engine and fuel system revealed no anomalies. The fuel selector handle had been removed, but the rod that rotated the valve remained intact and attached to the unit. The fuel selector was disassembled, and the ring was found located between detents. Based on its position, it may have been positioned between the left- and right-wing tip tanks; however, the position of the fuel selector at the time of the loss of engine power could not be determined. The pilot reported that there were 74 gallons of fuel onboard at the time of departure; however, neither the distribution of the fuel nor the fuel onboard at the time of the accident was determined. The reason for the partial loss of engine power could not be determined based on the available information.

Factual narrative

On December 6, 2018, at 1230 Pacific standard time, a Beech A36TC airplane, N361TC, was substantially damaged when it was involved in an accident near Los Banos, California. The private pilot was not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot departed about 1145 and reported that he planned to practice landings at the destination airport. He entered the downwind leg of the traffic pattern at the destination, and as he made the left base turn, the engine began to sputter. The pilot turned toward the runway and tried to maintain clearance from trees located on the outside of the airport perimeter fence; however, the propeller and landing gear impacted the fence. The airplane came to rest upright about 5 ft from the runway edge, resulting in substantial damage. Postaccident examination of the engine and fuel system revealed no anomalies. The fuel selector handle had been removed, but the rod that rotated the valve remained intact and attached to the unit. The fuel selector was disassembled, and the ring was found located between detents. Based on its position, it may have been positioned between the left- and right-wing tip tanks; however, the position of the fuel selector at the time of the loss of engine power could not be determined. The pilot reported that there were 74 gallons of fuel onboard at the time of departure; however, neither the distribution of the fuel, nor the fuel onboard at the time of the accident, were determined.

Aircraft

Registration
N361TC
Reported as
Beech 36 (A36TC)
Category
Airplane
Serial number
EA-139
Built
1980
Airframe hours
2,813.4
Engine
Continental IO-550-B-RA, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Utility
Last inspection
Annual · December 8, 2017
Departed
RHV · San Jose, CA
Destination
LSN · Los Banos, CA
Airport
LSN · Los Banos Muni, runway 32, 3,801 × 75 ft, asphalt
Equipment
Stall warning system, ADS-B, Auto-pilot, Electronic multifunction display, Electronic primary flight display

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
59
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land, Multi-engine land
Medical
Class 3, With waivers/limitations
Last flight review
December 6, 2016
Seat
Left
Flight hours
577 total · 184 in this make and model · 534 as pilot in command · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point 50 °F
Altimeter
29.92 inHg
Observed at
KCVH, 28 nm away

Docket · 6

The files NTSB released with the investigation on May 17, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 14.3 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.