WPR19LA139

NTSB accident investigation · Beech 35 · Minden, NV · May 5, 2019

Accident · No injuriesClass 3 · LimitedFinal report
Date
May 5, 2019, 08:20 local (15:20 UTC)
Place
Minden, NV
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N1510SBeech 35
Defining event
Landing-flare/touchdown: Landing gear not configured
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
20190505004049A
Case key
99400

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

A partial extension of the landing gear due to the poor condition of the electric landing gear motor, which resulted in a gear collapse upon landing.

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.

Landing gear system: gear extension and retract sysAircraft › Aircraft systems · Damaged/degradedBeech P35: 2 casesAll aircraft: 416 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 that the approach for landing was uneventful, and he selected the landing gear lever to the extended position. When the airplane touched down, the landing gear collapsed. The landing gear circuit breaker was found in the out position during postaccident examination. The airplane was placed on jacks and a gear swing test was conducted. During the test, the electric motor that drove the landing gear was noted to be "weak"; gear retraction was slow and the gear would only partially extend. No other anomalies in the landing gear system were noted. The cockpit landing gear lever, landing gear indications, and warning audio functioned properly during the test; thus, the pilot should have been alerted to the partial extension of the landing gear.

Factual narrative

On May 5, 2019, about 0820 Pacific daylight time, a Beech P35, N1510S, was substantially damaged when it was involved in an accident at Minden-Tahoe Airport (MEV), Minden, Nevada. The private pilot was not injured. The airplane was operated by the pilot as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that the approach was uneventful, and he selected the landing gear lever to the down position. When the airplane touched down, the landing gear collapsed. Postaccident examination of the airplane by a Federal Aviation Administration (FAA) inspector revealed substantial damage to its underside. Additionally, the landing gear circuit breaker was observed to be in the out position. At a later date, the airplane was further examined by an airframe and powerplant mechanic under the oversight of a FAA inspector. The airplane was placed on jacks and a landing gear swing was accomplished. The electrical motor that drove the landing gear to the extended and retracted position, was noted to be extremely weak and degraded. The motor would take an excessive time to retract and extend the gear. Furthermore, during gear extension, the gear would only partially extend. No other anomalies in the landing gear system were noted. The cockpit landing gear lever, landing gear indications, and warning audio were properly functioning.

Aircraft

Registration
N1510S
Reported as
Beech 35 (P35)
Category
Airplane
Serial number
D-6940
Built
1962
Airframe hours
1,793
Engine
Continental IO-470, 260 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 11, 2019
Departed
E79 · Fresno, CA
Destination
MEV · Minden, NV
Airport
MEV · Minden-Tahoe, runway 34, 7,399 × 100 ft, asphalt
Equipment
Stall warning system, Electronic flight bag or handheld device, Auto-pilot

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
75
Injuries
None
Certificate
Private
Airplane ratings
Single-engine sea, Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
May 12, 2018
Seat
Left
Flight hours
2,052 total · 52.7 in this make and model · 2,052 as pilot in command · 5 in the last 90 days · 5 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
240° at 3 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
50 °F, dew point 36 °F
Altimeter
29.89 inHg
Observed at
KMEV

Docket · 2

The files NTSB released with the investigation on October 9, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 522 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.