DEN02LA095

NTSB accident investigation · Let Blanik L-13 · Lehi, UT · July 23, 2002

Accident · No injuriesLimited investigationFinal report
Date
July 23, 2002, 14:00 local (20:00 UTC)
Place
Lehi, UT
Injuries
2 uninjured
Damage
Destroyed
Phase of flight
Landing
Aircraft
N48038Let Blanik L-13
Weather
Visual (VMC) · Day
Status
Completed · report April 1, 2003
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20020723019949A
Case key
55511

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

On this page

Probable cause

the pilot's inadequate in-flight planning resulting in the glider impacting terrain short of the runway, and the pilot's subsequent abrupt handling of the glider when it became airborne again, which resulted in a hard second landing. A contributing factor was the downdraft weather condition.

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.

On ground/water encounter with terrain/waterLanding
Weather condition - downdraftFactor
In-flight planning/decision - inadequatePilot in commandCause
Terrain condition - berm
Hard landingLanding - flare/touchdown
Aircraft handling - abruptPilot in commandCause

Analysis

The glider pilot said that he approached the north end of runway 17 for landing. He said "there is a nominal amount of sinking air at all times near the North end of the runway. The day of the incident the sink was far greater than expected." He said that he landed approximately 200 feet short of the runway, and impacted a 3 foot high berm next to an irrigation ditch (which ran perpendicular to the runway) at approximately 50 knots. The glider was "catapulted" over the ditch. The pilot immediately nosed the aircraft down to avoid a stall. "The glider landed flat and hard, crushing the landing gear, then skidding to a halt 75 feet past the runway apron." The glider's keel beam and wing spars were broken.

Factual narrative

On July 23, 2002, at approximately 1400 mountain daylight time, a LET Blanik L-13 glider, N48038, was destroyed during a hard landing at Cedar Valley Airpark (private), Lehi, Utah. The private pilot and his passenger were not injured. The Associated Glider Club of Southern California, Ltd., was operating the glider under Title 14 CFR Part 91. Visual meteorological conditions prevailed for the personal local flight which originated approximately 30 minutes before the accident. The pilot had not filed a flight plan.

The pilot said that he approached the north end of runway 17 for landing. He said "there is a nominal amount of sinking air at all times near the North end of the runway. The day of the incident the sink was far greater than expected." He said that he landed approximately 200 feet short of the runway, and impacted a 3 foot high berm next to an irrigation ditch (which ran perpendicular to the runway) at approximately 50 knots. The glider was "catapulted" over the ditch. The pilot immediately nosed the aircraft down to avoid a stall. "The glider landed flat and hard, crushing the landing gear, then skidding to a halt 75 feet past the runway apron." The glider's keel beam and wing spars were broken.

Aircraft

Registration
N48038
Reported as
Let Blanik L-13
Category
Glider
Serial number
026047
Airframe hours
1,131
Damage
Destroyed
Flight
Personal · Part 91
Operator
Brent Davis
Registered owner
Assoc. Glider Club of So CA LTD.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 26, 2002
Departed
PRIV · Lehi, UT
Airport
NONE · Cedar Valley Airpark, runway 17, 4,700 × 75 ft, dirt

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
Injuries
None
Certificate
Private
Seat
Front
Flight hours
85 as pilot in command · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 11 knots, gusting 16
Visibility
10 statute miles
Lowest ceiling
None
Temperature
95 °F, dew point 46 °F
Altimeter
30.06 inHg
Observed at
SLC, 27 nm away

Docket · 2

The files NTSB released with the investigation on December 10, 2002, on NTSB’s docket system: statements, records, photos and specialists’ reports. 597 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.