BFO94LA074

NTSB accident investigation · Let Blanik L-13 · Plymouth, MA · April 23, 1994

Accident · No injuriesLimited investigationFinal report
Date
April 23, 1994, 14:10 local (18:10 UTC)
Place
Plymouth, MA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N2167Let Blanik L-13
Weather
Visual (VMC) · Day
Status
Completed · report April 5, 1995
Report
Approved by Office Director
FAA report
19940423009039A
Case key
8915

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 failure to maintain adequate airspeed.

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.

Loss of control - in flightApproach - vfr pattern - base leg/base to final
Airspeed - not maintainedPilot in commandCause
Stall - inadvertentPilot in command
In flight collision with objectDescent - uncontrolled
Object - tree(s)

Analysis

The pilot reported that he was in the traffic pattern turning from base to final when he encountered a wind gust. He stated the wind '...blew my right wing up and over into a spin.' He recovered about 20 feet above tree tops, but he did not have enough altitude to reach the airport and the glider struck trees. The pilot reported the accident could have been prevented if he 'carried more speed.'

Factual narrative

On Saturday, April 23, 1994, about 1410 eastern daylight time, a Let-13-13 glider, N2167, collided with trees during final approach to Plymouth Airport, at Plymouth, Massachusetts. The certificated private pilot and his passenger were not injured. The glider sustained substantial damage. The local flight was being operated by Plymouth Aviation Soaring and was conducted under 14 CFR Part 91. Visual meteorological conditions prevailed and a flight plan was not filed.

According to the pilot, during the turn from base to final, "...a high gust of wind drove my right wing up and over into a spin. I initiated recovery procedure and leveled off about 20' above the trees...I realized I couldn't go anywhere at that altitude, picked a hole in the trees [and] flew to it and pancaked in."

The pilot stated that there were no mechanical malfunctions prior to the accident. He reported the accident could have been prevented if his airspeed was 55 mph instead of 45 mph.

Aircraft

Registration
N2167
Reported as
Let Blanik L-13 (BLANIK L-1)
Category
Glider
Serial number
173460
Engine
unknown
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Plymouth Aviation Soaring, doing business as Plymouth Aviation & Soaring
Registered owner
Danial Simmons
Airworthiness certificate
Special, Provisional (Special); Standard, Normal
Departed
PLY
Destination
PLY · MA
Airport
PYM · Plymouth Municipal Aprt, runway 24, 3,501 × 75 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
72
Certificate
Private
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Rear
Flight hours
424 total · 53 in this make and model · 187 as pilot in command · 11 in the last 90 days · 6 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
210° at 13 knots, gusting 23
Visibility
15 statute miles
Lowest ceiling
None
Temperature
52 °F, dew point 21 °F
Altimeter
30.00 inHg
Observed at
FMH, 18 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.