CEN09CA307

NTSB accident investigation · Beech C35 · Englewood, CO · May 19, 2009

Accident · No injuriesData collectionFinal report
Date
May 19, 2009, 14:30 local (20:30 UTC)
Place
Englewood, CO
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N1945DBeech C35
Defining event
Takeoff: Landing gear collapse
Weather
Visual (VMC) · Day
Status
Completed · report November 9, 2009
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20090519006319A
Case key
73870

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 collapse of the landing gear due to the mechanic's failure to properly wire the landing gear squat switch.

Findings · 2

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.

Maintenance: repairPersonnel issues › Task performance · Maintenance personnelBeech C35: 1 caseAll aircraft: 99 casesProbable cause
Landing gear system: land gear sys wiringAircraft › Aircraft systems · Incorrect service/maintenanceBeech C35: 1 caseAll aircraft: 9 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

During the takeoff roll, the airplane's main landing gear partially retracted and the nose landing gear collapsed completely. The airplane's left wing impacted the ground, resulting in structural damage. The airplane came to rest in an upright position on the runway and the pilot and the airplane's mechanic were able to exit the airplane unassisted. Following the accident, an examination of the landing gear revealed that the mechanic had wired the landing gear squat switch incorrectly, resulting in a retraction of the landing gear once the landing strut was extended.

Factual narrative

During the takeoff roll, the airplane's main landing gear partially retracted and the nose landing gear collapsed completely. The airplane's left wing impacted the ground, resulting in structural damage. The airplane came to rest in an upright position on the runway, and the pilot and the airplane's mechanic were able to exit the airplane unassisted. Following the accident, an examination of the landing gear revealed that the mechanic had wired the landing gear squat switch incorrectly; resulting in a retraction of the landing gear once the landing strut was extended.

Aircraft

Registration
N1945D
Reported as
Beech C35
Category
Airplane
Serial number
D-3223
Airframe hours
5,591
Engine
Cont Motor E-225-8, 225 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Schetgen Jeff E
Registered owner
Schetgen Jeff E
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 16, 2008
Departed
APA · Englewood, CO
Destination
FTG · Denver, CO
Airport
APA · Centennial Airport, runway 35L, 7,000 × 77 ft, asphalt

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
50
Injuries
None
Certificate
Commercial
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
February 15, 2008
Seat
Left
Flight hours
5,675 total · 1 in this make and model · 4,806 as pilot in command · 4 in the last 90 days · 4 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
12,000 ft broken
Temperature
82 °F, dew point 28 °F
Altimeter
29.95 inHg
Observed at
APA

Docket · 1

The files NTSB released with the investigation on June 25, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 514 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.

Other investigations on N1945D · 1

Matched to the same aircraft by N-number and date.