WPR11CA123

NTSB accident investigation · Beech 95-B55 (T42A) · Van Nuys, CA · February 6, 2011

Accident · Minor injuriesData collectionFinal report
Date
February 6, 2011, 10:00 local (18:00 UTC)
Place
Van Nuys, CA
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Standing
Aircraft
N2074LBeech 95-B55 (T42A)
Defining event
Standing-engine(s) start-up: Ground handling event
Weather
Visual (VMC) · Day
Status
Completed · report June 8, 2011
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration FSDO
FAA report
20110206002629A
Case key
78288

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 failure to turn off the engine magnetos and properly secure the airplane prior to rotating the propeller by hand, resulting in inadvertent movement of the airplane and collision with a building.

Findings · 3

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.

Engine starting: crankingAircraft › Aircraft power plant · Unintentional use/operationBeech 95-B55 (T42A): 1 caseAll aircraft: 3 casesProbable cause
Action: forgotten action/omissionPersonnel issues › Action/decision · PilotBeech 95-B55 (T42A): 4 casesAll aircraft: 440 casesProbable cause
Parking/securing: tie-down/mooringAircraft › Aircraft handling/service · Incorrect use/operationBeech 95-B55 (T42A): 1 caseAll aircraft: 33 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 completing an uneventful preflight inspection the pilot attempted to start the engines; however, neither would rotate. The pilot assumed that the battery was low, and that a low outside temperature had increased friction within the engine. He exited the airplane with the intention of rotating the propellers by hand, to increase lubrication within the engine. He pulled the left propeller through two rotations, and on the third rotation the engine inadvertently started. The airplane subsequently swiveled to the right and struck a building, causing substantial damage to the left wing. Examination of the left engine revealed that with the magneto switch set to the off position, rotation of the propeller by hand did not result in sparks at each spark plug electrode. The pilot stated that the accident could have been prevented if he had set the parking brakes and chocked the wheels, as well as confirmed that the magneto switches were off and that the throttle and mixture controls were set to the retarded and idle-cutoff positions.

Factual narrative

After completing an uneventful preflight inspection the pilot attempted to start the engines, however, neither would rotate. The pilot assumed that the battery was low, and that a low outside temperature had increased friction with the engine. He exited the airplane with the intention of rotating the propellers by hand, to increase lubrication within the engine. He pulled the left propeller through two rotations, and on the third, the engine inadvertently started. The airplane subsequently swiveled to the right and struck a building, causing substantial damage to the left wing. Examination of the left engine by the NTSB investigator-in-charge, revealed that with the magneto switch set to the off position, rotation of the propeller by hand did not result in sparks at each spark plug electrode. The pilot stated that the accident could have been prevented if he had set the parking brakes and chocked the wheels, as well as confirmed that the magneto switches were off, and that the throttle and mixture controls were set to retarded and idle-cutoff position.

Aircraft

Registration
N2074L
Reported as
Beech 95-B55 (T42A)
Category
Airplane
Serial number
TC-1975
Airframe hours
3,258
Engines
Cont Motor I0-470 SERIES, 260 horsepower, reciprocatingCont Motor IO-470 SERIES, 260 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 17, 2010 · 33 hours before
Departed
VNY · Van Nuys, CA
Destination
PSP · Palm Springs, CA
Flight plan
Unknown
Airport
VNY · Van Nuys

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
67
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
December 23, 2010
Seat
Left
Flight hours
250 total · 150 in this make and model · 0 in the last 90 days · 0 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
10° at 18 knots, gusting 24
Visibility
10 statute miles
Lowest ceiling
None
Temperature
72 °F, dew point 34 °F
Altimeter
30.12 inHg
Observed at
VNY, 1 nm away

Docket · 3

The files NTSB released with the investigation on March 1, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.2 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.