CEN15CA324

NTSB accident investigation · Aero Commander 100 · San Antonio, TX · July 23, 2015

Accident · Serious injuriesData collectionFinal report
Date
July 22, 2015, 20:48 local (Jul 23, 2015, 01:48 UTC)
Place
San Antonio, TX
Injuries
1 serious, 1 minor
Damage
Substantial damage
Phase of flight
Standing
Aircraft
N5542MAero Commander 100
Defining event
Standing-engine(s) start-up: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report March 14, 2016
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration; San Antonio FSDO
FAA report
20150722015999A
Case key
91656

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 improper decision to attempt flight with an unairworthy airplane and improper starting procedure that resulted in an uncontrolled takeoff without the pilot aboard. Contributing was the inoperative airplane battery/engine starter.

Findings · 4

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.

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 attempted to start the airplane engine by hand propping it because the engine could not be started using the starter because the battery was dead. The airplane had a chock under the left main landing gear wheel, and the pilot side door was propped open with a passenger aboard for the engine start. Upon engine start, the airplane jumped the chock and began to accelerate along the ground. The pilot ran along side of the airplane attempting to open the pilot side door, which had closed. When the airplane speed became too fast for the pilot to run alongside of the airplane, he stood on the main landing gear, holding the strut, and continued to attempt entry into the airplane while telling the passenger to pull the brake, throttle, mixture, or turn off the ignition key switch. The airplane impacted a 10-inch barrier, knocking the pilots legs off the main landing gear, and the airplane ran over the pilot's leg. The pilot pulled up onto the wing strut, still giving instruction to the passenger while attempting to enter the pilot side door, but the prop-wash was making this "feat impossible". About 59 mph, the airplane departed the airfield, becoming airborne, and at 6 feet above ground level, the pilot let go of the wing strut and fell to the ground. The airplane climbed, nosed forward, touched down on the nose landing gear, and impacted a construction dirt pilot before it nosed-over. The airplane sustained substantial damage that included damage to each wing spar and a bent empennage. The pilot sustained minor injuries, and the passenger sustained serious injuries. The airplane was not equipped with shoulder harnesses and was not required to be equipped with shoulder harnesses. The pilot's experience in hand-propping airplanes and the injuries of the passenger were unknown at the time this report was written.

Factual narrative

The pilot attempted to start the airplane engine by hand propping it because the engine could not be started using the starter because the battery was dead. The airplane had a chock under the left main landing gear wheel, and the pilot side door was propped open with a passenger aboard for the engine start. Upon engine start, the airplane jumped the chock and began to accelerate along the ground. The pilot ran along side of the airplane attempting to open the pilot side door, which had closed. When the airplane speed became too fast for the pilot to run alongside of the airplane, he stood on the main landing gear, holding the strut, and continued to attempt entry into the airplane while telling the passenger to pull the brake, throttle, mixture, or turn off the ignition key switch. The airplane impacted a 10-inch barrier, knocking the pilots legs off the main landing gear, and the airplane ran over the pilot's leg. The pilot pulled up onto the wing strut, still giving instruction to the passenger while attempting to enter the pilot side door, but the prop-wash was making this "feat impossible". About 59 mph, the airplane departed the airfield, becoming airborne, and at 6 feet above ground level, the pilot let go of the wing strut and fell to the ground. The airplane climbed, nosed forward, touched down on the nose landing gear, and impacted a construction dirt pilot before it nosed-over. The airplane sustained substantial damage that included damage to each wing spar and a bent empennage. The pilot sustained minor injuries, and the passenger sustained serious injuries. The airplane was not equipped with shoulder harnesses and was not required to be equipped with shoulder harnesses. The pilot's experience in hand-propping airplanes and the injuries of the passenger were unknown at the time this report was written.

Aircraft

Registration
N5542M
Reported as
Aero Commander 100
Category
Airplane
Serial number
104
Built
1967
Airframe hours
5,000
Engine
Lycoming O-320, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Operator
Pilot
Registered owner
Individual
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 1, 2015
Departed
SSF · San Antonio, TX
Destination
7F7 · Clifton, TX
Airport
SSF · Stinson Municipal Airport
Equipment
Stall warning system

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
52
Injuries
Minor
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
April 25, 2014
Seat
None
Restraint
Lap only
Flight hours
2,806 total · 30 in this make and model · 2,764 as pilot in command · 79 in the last 90 days · 30 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
140° at 10 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
88 °F, dew point 73 °F
Altimeter
29.86 inHg
Observed at
SSF

Docket · 1

The files NTSB released with the investigation on February 3, 2016, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.5 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.