DEN01LA143

NTSB accident investigation · Blanik L-13 · Morgan, UT · August 11, 2001

Accident · No injuriesLimited investigationFinal report
Date
August 11, 2001, 12:50 local (18:50 UTC)
Place
Morgan, UT
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N310GMBlanik L-13
Weather
Visual (VMC) · Day
Status
Completed · report November 1, 2001
Report
Approved by Office Director
Parties
FAA Flight Standards District Office
FAA report
20010811021429A
Case key
53004

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 inadvertent lowering of the flaps and her failure to extend the spoilers.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight collision with objectApproach - vfr pattern - final approach
Lowering of flaps - inadvertentPilot in commandCause
Spoiler extension - not selectedPilot in commandCause
Proper descent rate - not possiblePilot in command
Object - tree(s)Factor

Analysis

The glider was a little high as the pilot approached the airport for landing. She pulled the spoiler handle twice and heard what she thought was the sound of the spoilers deploying, but failed to verify it visually. She had actually pulled the flap handle. The glider overshot the runway and she elected to land on a road adjacent to the departure end of the runway. The right wing was severed when the glider struck a tree and ground looped. The empennage was also torn off. The pilot said the flap handle is next to the spoiler handle and they are identical in appearance. The flap handle was found unlocked and half deployed; the spoiler handle was stowed.

Factual narrative

On August 11, 2001, approximately 1250 mountain daylight time, a Blanik L-13, N310GM, was substantially damaged when it collided with a tree and ground looped during landing on a road near Morgan, Utah. The private pilot and her passenger were not injured. Visual meteorological conditions prevailed, and no flight plan had been filed for the personal flight being conducted under Title 14 CFR Part 91. The flight originated at Morgan approximately 1220.

The following is based on an FAA inspector's verbal report of a conversation he had with the pilot, and the accident report submitted by the pilot. The glider was a little high as the pilot approached the airport for landing. She pulled the spoiler handle twice and heard what she thought was the sound of the spoilers deploying, but failed to verify it visually. She said she had actually pulled the flap handle. The glider overshot the runway and she elected to land on a road adjacent to the departure end of the runway. The right wing was severed when it struck a tree and the glider ground looped. The empennage was also torn off. The pilot said the flap handle is next to the spoiler handle and they are identical in appearance. The flap handle was found unlocked and half deployed; the spoiler handle was stowed.

Aircraft

Registration
N310GM
Reported as
Blanik L-13
Category
Glider
Serial number
025730
Airframe hours
3,228
Engine
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Wayne Wilkinson
Airworthiness certificate
Standard, Utility
Last inspection
Annual · October 1, 2000 · 45 hours before
Departed
42U · Morgan, UT
Airport
42U · Morgan County, runway 03, 3,800 × 45 ft, asphalt

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
41
Injuries
None
Certificate
Private
Last flight review
October 30, 1999
Seat
Front
Flight hours
56 total · 5 in this make and model · 33 as pilot in command · 5 in the last 90 days · 2 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 4 knots
Visibility
7 statute miles
Lowest ceiling
None
Temperature
84 °F, dew point 48 °F
Altimeter
30.17 inHg
Observed at
HIF, 13 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.