CEN10CA507

NTSB accident investigation · Let L-23 Super Blanik · Socorro, NM · August 28, 2010

Accident · No injuriesData collectionFinal report
Date
August 28, 2010, 09:30 local (15:30 UTC)
Place
Socorro, NM
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N361BALet L-23 Super Blanik
Defining event
Approach-VFR pattern base: Loss of lift
Weather
Visual (VMC) · Day
Status
Completed · report December 20, 2010
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20100828054479A
Case key
77129

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 loss of lift that resulted in an off-airport landing.

Findings · 3

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.

Object/animal/substance: fence/fence postEnvironmental issues › Physical environment · Contributed to outcomeLet L-23 SUPER BLANIK: 1 caseAll aircraft: 313 cases
Wind: downdraftEnvironmental issues › Conditions/weather/phenomena · Effect on operationLet L-23 SUPER BLANIK: 1 caseAll aircraft: 178 casesProbable cause
Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Attain/maintain not possibleLet L-23 SUPER BLANIK: 2 casesAll aircraft: 1,310 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

According to a written statement received from the Civil Air Patrol, and forwarded to the National Transportation Safety Board, the glider lost lift while preparing to land. The pilot selected an off-field landing location and during the landing attempt, encountered terrain and a fence that was not expected. The glider was substantially damaged during the impact. An examination of the glider and its systems, conducted by the Federal Aviation Administration, revealed no anomalies.

Factual narrative

According to a written statement received from the Civil Air Patrol, and forwarded to the National Transportation Safety Board, the glider lost lift while preparing to land. The pilot selected an off field landing location and during the landing attempt, encountered terrain and a fence that was not expected. The glider was substantially damaged during the impact. An examination of the glider and its systems, conducted by the Federal Aviation Administration, revealed no anomalies.

Aircraft

Registration
N361BA
Reported as
Let L-23 Super Blanik
Category
Glider
Serial number
008703
Airframe hours
650
Damage
Substantial damage
Flight
Other work use · Public use
Operator
Civil Air Patrol Inc
Registered owner
Civil Air Patrol Inc
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 3, 2010
Departed
KONM · Socorro, NM
Destination
KONM · Socorro, NM
Flight plan
Company VFR
Airport
KONM · Socorro

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
74
Injuries
Minor
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
July 3, 2009
Seat
Rear
Flight hours
2,469 total · 147 in this make and model · 2,269 as pilot in command · 7 in the last 90 days · 3 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
77 °F, dew point 57 °F
Altimeter
30.02 inHg
Observed at
KONM

Docket · 1

The files NTSB released with the investigation on September 23, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 125 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.