WPR09LA313

NTSB accident investigation · Rolladen-Schneider OHG LS3-A · Cedar Valley, UT · June 25, 2009

Accident · Serious injuriesLimited investigationFinal report
Date
June 25, 2009, 12:40 local (18:40 UTC)
Place
Cedar Valley, UT
Injuries
1 serious
Damage
Minor damage
Phase of flight
Takeoff
Aircraft
N800JMRolladen-Schneider OHG LS3-A
Defining event
Takeoff: Dragged wing/rotor/float/other
Weather
Visual (VMC) · Day
Status
Completed · report November 9, 2009
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
Case key
74141

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 NTSB’s determination of the probable cause, and any contributing factors.

The pilot inadvertently applied the tow release handle.

Findings · 2

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings.

Analysis

The glider was being towed aloft by a tow-plane. Takeoff procedures for the glider required that the flaps be set at 0 degrees until aileron effectiveness, and then the flaps should be set at 10 degrees. The pilot had 0 degrees of flaps selected, and during the ground roll, the left wing was dragging on the ground surface. He attempted to align the glider with the runway and removed his hand from the flap handle and placed it on the tow release handle, intending to abort the takeoff. He leveled the wings and the glider lifted from the runway. The pilot gained control of the glider and intended to extend the flaps 10 degrees; however, his hand was still on the tow release handle and he unintentionally pulled the tow release at 75 to 100 feet above ground level. During the forced landing, the pilot misjudged the flare, the glider landed hard, and the pilot sustained serious spinal injuries.

Factual narrative

The factual narrative522 words

On June 25, 2009, at 1240 mountain daylight time, N800JM, a Rolladen-Schneider OHG LS3-A glider, landed in a field shortly after takeoff from West Desert Airpark, Cedar Valley, Utah. The pilot owned the glider and was operating it under the provisions of 14 Code of Federal Regulations Part 91. The glider sustained minor damage and the private pilot was seriously injured. Visual meteorological conditions prevailed and no flight plan was filed. The pilot submitted a written statement. He reported that he was departing from runway 17 through an aero-tow behind a Cessna 182. The wind was from 080 degrees at less than 10 knots. Normal aero-tow requirements state that flaps should be kept at 0 degrees until aileron effectiveness. The flaps should then be set to 10 degrees. The pilot’s left hand was on the flap handle and the flaps were set to 0 degrees at the beginning of the takeoff. The pilot stated that the left wing was set too low and then dropped during the takeoff. As the left wing was scraping along, the nose of the glider was yawing to the left. He applied full right rudder, attempting to stay straight down the runway. The pilot then took his left hand off the flap handle and placed it on the tow release handle, intending to abort the takeoff. Before pulling the release, he made an attempt to level the wings with an abrupt roll motion with the stick. The glider banked to the right and then lifted off, drifting high and to the right of the runway and the tow-plane. As the tow-plane climbed, the pilot gained control of the glider and gradually positioned it behind the tow-plane using a sideslip and forward stick pressure. As he maneuvered the glider into position, the pilot moved his hand back to extend the flaps 10 degrees. However, his left hand was still holding the tow release handle and not the flap handle, and he unintentionally pulled the tow release at 75 to 100 feet above ground level. The pilot further reported that he followed his emergency plan and lowered the nose slightly while turning in order to land in a field. The pilot felt that he focused too much on his aim point and not on the horizon, and that he had opened the spoilers too much and did not extend the flaps. He misjudged his flair and the glider impacted the ground in a nose down position and the pilot sustained a spinal injury. The pilot felt that the accident was a result of a chain of mistakes due to the following: - He should have aborted the takeoff while still on the ground. - He was trained not to put his hand on the release handle until fully intending to release. - He was trained not to fixate on the aim point but to look down the runway at the horizon when nearing the ground so as to time the flare properly. According to the pilot, the lack of time to stabilize the approach as well as not having a runway to line up with likely aggravated this tendency.

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident.

Aircraft

Registration
N800JM
Reported as
Rolladen-Schneider OHG LS3-A
Category
Glider
Serial number
3325
Airframe hours
1,535
Damage
Minor damage
Flight
Personal · Part 91
Operator
Steven G. Rathbun
Registered owner
Steven G Rathbun
Airworthiness certificate
Standard, Normal
Last inspection
Annual · November 5, 2008 · 20 hours before
Departed
UT99 · Cedar Valley, UT
Destination
UT99 · Cedar Valley, UT
Airport
UT99 · West Desert Airpark, runway 17, 2,600 × 40 ft, gravel

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
51
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
November 25, 2008
Seat
Center
Flight hours
155 total · 20 in this make and model · 62 as pilot in command · 22 in the last 90 days · 15 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 4 knots
Visibility
15 statute miles
Lowest ceiling
12,000 ft broken
Temperature
88 °F, dew point 41 °F
Altimeter
30.05 inHg
Observed at
PVU, 19 nm away

Docket · 3

The files NTSB released with the investigation on September 11, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.7 MB in all.