ERA10CA268

NTSB accident investigation · Cessna 172N · Blue Hill, ME · May 16, 2010

Accident · No injuriesData collectionFinal report
Date
May 16, 2010, 09:25 local (13:25 UTC)
Place
Blue Hill, ME
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N733XDCessna 172N
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report August 12, 2010
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20100516034029A
Case key
76036

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 flight instructor’s inability to maintain directional control while landing with gusting winds.

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.

Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Ability to respond/compensateCessna 172N: 19 casesAll aircraft: 1,008 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

According to the flight instructor, he was demonstrating a soft-field landing to a grass runway in a tricycle-gear airplane. During the landing roll on runway 34, a “strong wind gust from the right” lifted the airplane’s right wing, and the airplane “slid sideways to the left.” The student pilot noted that the airplane had landed “midline,” and after the gust of wind struck, the nose of the airplane headed left even though the instructor had applied full right rudder and aileron. The airplane’s left wing subsequently grazed small tree branches, then impacted a bigger branch that rotated the airplane counter-clockwise. The airplane came to rest perpendicular to the grass runway, with the airplane’s nose facing into the trees. The airplane’s left wing tip and right wing leading edge were damaged. The flight instructor and the student pilot reported that there were no mechanical malfunctions or failures of the airplane. Weather, reported about 9 miles east of the accident site, included winds from 320 degrees at 12 knots, gusting 17 knots.

Factual narrative

According to the flight instructor, he was demonstrating a soft field landing to a grass runway in a tricycle-gear airplane. During the landing roll on runway 34, a “strong wind gust from the right” lifted the airplane’s right wing, and the airplane “slid sideways to the left.” The student pilot noted that the airplane had landed “midline,” and after the gust of wind struck, the nose of the airplane headed left even though the instructor had applied full right rudder and aileron. The airplane’s left wing subsequently grazed small tree branches, then impacted a bigger branch that rotated the airplane counter-clockwise. The airplane came to rest perpendicular to the grass runway, with the airplane’s nose facing into the trees. The airplane’s left wing tip and right wing leading edge were substantially damaged. The flight instructor and the student pilot reported there were no mechanical malfunctions or failures of the airplane. Weather, reported about 9 miles east of the accident site, included winds from 320 degrees at 12 knots, gusting 17 knots.

Aircraft

Registration
N733XD
Reported as
Cessna 172N
Category
Airplane
Serial number
17268623
Airframe hours
5,854
Engine
Lycoming O-360-A4M, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Jej Leasing LLC
Registered owner
Jej Leasing LLC
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
Annual · May 7, 2010
Departed
BHB · Bar Harbor, ME
Destination
07B · Blue Hill, ME
Airport
07B · Blue Hill Airport, runway 34, 3,186 × 100 ft, grass/turf

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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Flight instructor
Age
56
Injuries
None
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
June 14, 2008
Seat
Right
Flight hours
1,721 total · 1,100 in this make and model · 1,644 as pilot in command · 33 in the last 90 days · 15 in the last 30 days · 2 in the last 24 hours
Role
Student pilot
Age
59
Injuries
None
Certificate
Student
Medical
Class 3, With waivers/limitations
Seat
Left
Flight hours
107 total · 90 in this make and model · 23 as pilot in command · 18 in the last 90 days · 1 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
320° at 12 knots, gusting 17
Visibility
10 statute miles
Lowest ceiling
None
Temperature
57 °F, dew point 36 °F
Altimeter
29.95 inHg
Observed at
BHB, 9 nm away

Docket · 4

The files NTSB released with the investigation on July 6, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 705 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.