ERA14CA314

NTSB accident investigation · Cessna 172L · Danbury, CT · June 28, 2014

Accident · No injuriesData collectionFinal report
Date
June 28, 2014, 10:40 local (14:40 UTC)
Place
Danbury, CT
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Standing
Aircraft
N7867GCessna 172L
Defining event
Standing-engine(s) start-up: Ground collision
Weather
Visual (VMC) · Day
Status
Completed · report October 9, 2014
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20140628012071A
Case key
89559

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 pilot's use of a person unfamiliar with aviation and his failure to properly secure the airplane during hand starting of the engine.

Findings · 5

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.

Action: lack of actionPersonnel issues › Action/decision · PilotCessna 172L: 3 casesAll aircraft: 792 casesProbable cause
Parking/securing: tie-down/mooringAircraft › Aircraft handling/service · Incorrect use/operationCessna 172L: 1 caseAll aircraft: 33 casesProbable cause
Knowledge: aeronautical knowledgePersonnel issues › Experience/knowledge · PassengerCessna 172L: 1 caseAll aircraft: 7 cases
Object/animal/substance: aircraftEnvironmental issues › Physical environment · Contributed to outcomeCessna 172L: 1 caseAll aircraft: 116 cases

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.

Ground collisionStanding-engine(s) start-upCessna 172L: 5 casesAll aircraft: 618 casesDefining event

Analysis

The pilot stated that following preflight inspection of the airplane he attempted to start the engine using the starter but was unable. He indicated this to be, "an on-and-off issue…" in that he had to hand start the engine once during 5 attempts prior to 5 separate flights the previous weekend. He elected to hand start the engine without assistance because he was unable to locate personnel from the fixed base operator, and asked the non-rated passenger seated in the right front seat to apply the aircraft's brakes. With the airplane unsecured and the throttle applied "a little bit", the engine started. Initially the airplane did not move, but then began to move. He attempted to board the airplane but was unable and it began travelling faster. The airplane turned to the left, went between 2 rows of airplanes and impacted several parked unoccupied airplanes. The pilot further stated that he did not show the passenger how to activate the aircraft's brakes, and believes the passenger may have inadvertently applied left rudder in an attempt to stop the airplane, although the passenger told him he did not recall doing so. There were no injuries to the front or rear seat passengers, and there were no ground injuries. The Federal Aviation Administration (FAA) Pilot's Handbook of Aeronautical Knowledge contains a section titled, "Hand Propping" which indicates to never allow a person unfamiliar with the controls to occupy the pilot's seat when hand propping. The section also indicates that an additional precaution includes placement of chalks in front of the main tires or if not feasible, the airplane's tail may be securely tied. The excerpts are contained in the NTSB public docket.

Factual narrative

The pilot stated that following preflight inspection of the airplane he attempted to start the engine using the starter but was unable. He indicated this to be, "an on-and-off issue…" in that he had to hand start the engine once during 5 attempts prior to 5 separate flights the previous weekend. He elected to hand start the engine without assistance because he was unable to locate personnel from the fixed base operator, and asked the non-rated passenger seated in the right front seat to apply the aircraft's brakes. With the airplane unsecured and the throttle applied "a little bit", the engine started. Initially the airplane did not move, but then began to move. He attempted to board the airplane but was unable and it began travelling faster. The airplane turned to the left, went between 2 rows of airplanes and impacted several parked unoccupied airplanes.The pilot further stated that he did not show the passenger how to activate the aircraft's brakes, and believes the passenger may have inadvertently applied left rudder in an attempt to stop the airplane, although the passenger told him he did not recall doing so. There were no injuries to the front or rear seat passengers, and there were no ground injuries. The Federal Aviation Administration (FAA) Pilot's Handbook of Aeronautical Knowledge contains a section titled, "Hand Propping" which indicates to never allow a person unfamiliar with the controls to occupy the pilot's seat when hand propping. The section also indicates that an additional precaution includes placement of chalks in front of the main tires or if not feasible, the airplane's tail may be securely tied. The excerpts are contained in the NTSB public docket.

Aircraft

Registration
N7867G
Reported as
Cessna 172L
Category
Airplane
Serial number
17259567
Built
1970
Airframe hours
5,460
Engine
Lycoming 0-320-E2D, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Jao-Shiang Luo
Registered owner
Mei-Chu Corp
Airworthiness certificate
Standard, Utility; Standard, Normal
Last inspection
Annual · February 11, 2014 · 21 hours before
Departed
DXR · Danbury, CT
Destination
MVY · Vineyard Haven, MA
Flight plan
VFR
Airport
DXR · Danbury 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
51
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
March 31, 2013
Seat
None
Flight hours
290 total · 235 in this make and model · 149 as pilot in command · 14 in the last 90 days · 3 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
220° at 3 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
79 °F, dew point 57 °F
Altimeter
30.29 inHg
Observed at
DXR

Docket · 6

The files NTSB released with the investigation on October 2, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 6.4 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.

Other investigations on N7867G · 1

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