CHI91LA231

NTSB accident investigation · Let L-13 · Gregory, MI · July 26, 1991

Accident · No injuriesLimited investigationFinal report
Date
July 26, 1991, 19:30 local (23:30 UTC)
Place
Gregory, MI
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N781BALet L-13
Weather
Visual (VMC) · Day
Status
Completed · report March 31, 1993
Report
Approved by Office Director
FAA report
19910726030209A
Case key
15129

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

A collision with wires after the glider overshot the landing area due to inadvertent lowering of the flaps and no use of 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.

Miscellaneous/otherLanding
Lowering of flaps - inadvertent activationPilot in commandCause
Spoiler extension - not usedPilot in commandCause
Proper glidepath - not attainedPilot in commandCause
Remedial action - not performedPilot in commandCause
OverrunLanding - flare/touchdown
In flight collision with objectLanding - flare/touchdown
Object - wire,staticFactor
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - rough/uneven

Analysis

The student glider pilot said that he inadvertently deployed the flaps instead of the spoilers while making a landing approach. The glide path was shallowed and the pilot was unable to land on the grass strip. The glider overshot the runway and collided with power lines, then the rough terrain.

Aircraft

Registration
N781BA
Reported as
Let L-13
Category
Glider
Serial number
02 56 18
Airframe hours
1,158
Engine
unknown
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Sandhill Soaring Club
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · July 12, 1991 · 41 hours before
Airport
69G · Richmond, runway 35, 2,252 × 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

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
45
Certificate
Private
Medical
Unknown
Seat
Front
Flight hours
20 total · 1 in this make and model · 9 as pilot in command · 5 in the last 90 days · 2 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
350° at 7 knots
Visibility
15 statute miles
Lowest ceiling
None
Observed at
JXN, 15 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.