LAX03LA114

NTSB accident investigation · Schleicher ASW-20 · San Diego, CA · March 16, 2003

Accident · No injuriesLimited investigationFinal report
Date
March 16, 2003, 10:00 local (18:00 UTC)
Place
San Diego, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N31APSchleicher ASW-20
Weather
Visual (VMC) · Day
Status
Completed · report October 28, 2004
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20030316004739A
Case key
56659

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 use of an inadequate climb attitude during takeoff resulting in the proper climb rate not being established.

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.

Dragged wing,rotor,pod,float or tail/skidTakeoff - aborted
Proper climb rate - not attainedPilot in commandCause

Analysis

The right wing tip contacted the ground during an aborted takeoff. Gliders are launched from this airport with the assistance of a winch launch system. The winch launch system requires the pilot of the glider to obtain a steep climb attitude to prevent slack in the tow cable, and to establish an adequate airspeed and altitude prior to releasing from the cable. Witnesses who are glider pilots said the launch operation started normally and the glider rolled forward with good apparent speed. At the normal point of rotation, the typical rapid transition to a high angle of attack did not occur. The glider climbed to 20 to 30 feet above ground level, then leveled off. The glider appeared to overshoot the cable and the tow cable became slack. The glider appeared to be flying near stall speed when the pilot attempted to land on the emergency-intersecting runway. The right wing drug on the ground and the glider ground looped prior to stopping. The pilot stated that during launch, the glider did not gain enough altitude or airspeed to continue the flight. The pilot elected to abort the take off and tried to turn to land on a short intersecting runway. During the landing sequence the right wing tip contacted the ground. The glider ground looped, and came to rest on the north side of runway 27. The pilot said there were no mechanical discrepancies with the glider.

Factual narrative

On March 16, 2003, about 1000 Pacific standard time, a Schleicher ASW-20 glider, N31AP, collided with terrain during an aborted takeoff at Torrey Pines Gliderport (CA84), San Diego, California. The pilot-owner was operating the glider on a personal local flight under the provisions of 14 CFR Part 91. The private pilot, the sole occupant, was not injured; the glider sustained substantial damage. Day visual meteorological conditions prevailed, and no flight plan had been filed. The primary wreckage was at 32 degrees 53 minutes north latitude and 117 degrees 14 minutes west longitude.

The pilot reported that gliders at CA84 are launched with the assistance of a winch launch system. The winch launch system requires the pilot of the glider to obtain a steep climb attitude to prevent slack in the tow cable, and to establish an adequate airspeed and altitude prior to releasing from the cable.

A commercial glider pilot and a private airplane pilot who witnessed the accident and photographed the takeoff and accident sequences stated:

"The launch operation started normally and the glider rolled forward with good apparent speed. At the normal point of rotation, the typical rapid transition to a high angle of attack did not occur. The glider climbed to 20 to 30 feet above ground level, then leveled off. The glider appeared to overshoot the cable and the tow cable became slack. The glider appeared to be flying near stall speed when the pilot attempted to land on the emergency-intersecting runway. The right wing drug on the ground and the glider ground looped prior to stopping."

The pilot stated that during his winch-assisted launch, the glider did not gain enough altitude or airspeed to continue the flight. The pilot elected to abort the takeoff and tried to turn to land on a short intersecting runway. During the landing sequence the right wing tip contacted the ground. The glider ground looped, and came to rest on the north side of runway 27. The tail boom broke 3 feet forward of the vertical stabilizer, the main landing gear was bent, the belly pan forward of the main gear was cracked, and the outboard 1/3 of the right wing was scuffed.

The pilot-owner reported there were no unresolved maintenance discrepancies against the glider prior to accident flight.

Aircraft

Registration
N31AP
Reported as
Schleicher ASW-20
Category
Glider
Serial number
20369
Airframe hours
984.1
Engine
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Mark E. Navarre
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · April 20, 2002 · 147 hours before
Departed
CA84 · San Diego, CA
Airport
CA84 · Torrey Pines Gliderport, runway 27, 1,500 × 30 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
41
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Expired
Last flight review
December 6, 2002
Seat
Front
Flight hours
777 total · 419 in this make and model · 696 as pilot in command · 16 in the last 90 days · 5 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 9 knots
Visibility
10 statute miles
Lowest ceiling
2,600 ft overcast
Temperature
55 °F, dew point 50 °F
Altimeter
29.79 inHg
Observed at
KMYF, 7 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.

Other investigations on N31AP · 2

Matched to the same aircraft by N-number and date.