WPR10CA329

NTSB accident investigation · Cornett Steven M Glastar · Smiley Creek, ID · June 27, 2010

Accident · No injuriesData collectionFinal report
Date
June 26, 2010, 20:00 local (Jun 27, 2010, 02:00 UTC)
Place
Smiley Creek, ID
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N51MWCornett Steven M Glastar
Defining event
Takeoff-rejected takeoff: Runway excursion
Weather
Visual (VMC) · Day
Status
Completed · report October 21, 2010
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20100626037539A
Case key
76537

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 decision to not use all available runway length and his delay in aborting the takeoff, which resulted in the airplane sliding off the end of the grass strip and colliding with a ditch.

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.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedCornett Steven M GLASTAR: 1 caseAll aircraft: 3,958 casesProbable cause
Runway/land/takeoff/taxi surface: wet surfaceEnvironmental issues › Physical environment · Contributed to outcomeCornett Steven M GLASTAR: 1 caseAll aircraft: 141 cases
Airport facilities/design: runway/landing area lengthEnvironmental issues › Operating environment · Decision related to conditionCornett Steven M GLASTAR: 1 caseAll aircraft: 34 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

The pilot reported that he had been landing and departing from the grass strip numerous times earlier in the day. For the accident flight, he was attempting to perform a midfield takeoff. During the departure roll, the airplane momentarily became airborne and then settled back into the wet grass and slowed. He opted to immediately abort the takeoff by retarding the throttle control and applying brakes. The airplane then slid off the end of the grass strip and collided with a ditch, incurring damage to the right wing and tail. The pilot reported no pre impact mechanical malfunctions or failures with the airframe or engine.

Factual narrative

The pilot reported that he had been landing and departing from the grass strip numerous times earlier in the day. For the accident flight, he was attempting to perform a midfield takeoff. During the departure roll, the airplane momentarily became airborne and then settled back into the wet grass and slowed. He opted to immediately abort the takeoff by retarding the throttle control and applying brakes. The airplane slid off the end of the grass strip and collided with a ditch, incurring damage to the right wing and tail. The pilot reported no pre impact mechanical malfunctions or failures with the airframe or engine.

Aircraft

Registration
N51MW
Reported as
Cornett Steven M Glastar
Category
Airplane, amateur-built
Serial number
5586
Airframe hours
498
Engine
Lycoming O&VO-360 SER, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Beery Douglas W
Registered owner
Beery Douglas W
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · March 3, 2010 · 111 hours before
Departed
U87 · Smiley Creek, ID
Destination
U87 · Smiley Creek, ID
Airport
U87 · Smiley Creek, runway 14, 4,900 × 150 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

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
40
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land, Single-engine sea
Medical
Class 3, Without waivers/limitations
Last flight review
October 16, 2009
Seat
Left
Flight hours
510 total · 96 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
310° at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
66 °F, dew point 36 °F
Altimeter
30.14 inHg
Observed at
KSNT, 16 nm away

Docket · 1

The files NTSB released with the investigation on July 19, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 298 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.