CHI87LA002

NTSB accident investigation · Let L-13 · White Bear Lake, MN · October 8, 1986

Accident · No injuriesLimited investigationFinal report
Date
October 8, 1986, 18:15 local (23:15 UTC)
Place
White Bear Lake, MN
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N142ASLet L-13
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19861008048389A
Case key
13676

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

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.

UndershootApproach - vfr pattern - final approach
Spoiler retraction - not performedPilot in commandCause
Lack of total experiencePilot in commandCause
Proper descent rate - not maintainedPilot in commandCause
Weather condition - tailwindFactor
Compensation for wind conditions - inadequatePilot in commandCause
In flight collision with objectApproach - vfr pattern - final approach
Object - utility pole

Analysis

The plt reported that he entered the traffic pattern for rwy 30 at aprx 900 ft and completed a right turn to base. The plt stated that while on base, he realized the aircraft was too high and deployed the spoilers halfway. As he turned to final, he stated that he was too low and at that point observed the airspeed dropping to the stall point. In an attempt to avoid a stall, the plt lowered the acft nose and realized that he would not make the arpt. According to the plt, he then flew under power lines and deliberately struck a power line pole with the right wing at approximately 30 ft AGL, in order to dissapate energy. Approximately 10 ft of the outboard right wing was severed from the acft as it rotated 90 degrees to the right and dropped about 15 ft before coming to rest in a swamp about 200 yards from the arpt. A witness stated that he clearly observed the glider's spoilers in a fully deployed position when the acft rolled out on final.

Aircraft

Registration
N142AS
Reported as
Let L-13
Category
Glider
Serial number
027062
Airframe hours
910
Engine
None NONE, unknown
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Red Wing Flying Assn. Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · May 22, 1986 · 58 hours before
Airport
76Y · Benson Airport, runway 30, 2,000 × 200 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
36
Certificate
Student
Seat
Front
Flight hours
13 total · 13 in this make and model · 2 as pilot in command · 11 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
60° at 6 knots
Visibility
25 statute miles
Lowest ceiling
None
Temperature
54 °F, dew point 39 °F
Altimeter
30.00 inHg
Observed at
MSP, 107 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.