MIA98LA218

NTSB accident investigation · Schweizer SGS 1-34 · Pensacola, FL · August 1, 1998

Accident · No injuriesLimited investigationFinal report
Date
August 1, 1998, 13:15 local (18:15 UTC)
Place
Pensacola, FL
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N7631Schweizer SGS 1-34
Weather
Visual (VMC) · Day
Status
Completed · report June 21, 2000
Report
Approved by Office Director
FAA report
19980801026789A
Case key
43567

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

The pilot's failure to maintain a proper sink rate during an emergency landing resulting in impact with trees and subsequent stall and impact with the terrain.

Analysis

The pilot stated that the glider was about 100 feet above ground level, and attached to the tow airplane when the canopy suddenly opened. He climbed to 200 feet, released the towrope, and made a 180-degree left turn to return to the airport. As he cleared a wooded area before the runway, he noticed that his sink rate was too high. He pulled up, but his right wingtip brushed the top of a tree. The airplane stalled and crashed about 300 feet short of the runway. According to the pilot, the canopy's latching mechanism did not reveal any malfunctions during preflight or postcrash examination.

Factual narrative

On August 1, 1998, about 1315 central daylight time, a Schweizer SGS 1-34 glider, N7631, registered to Coastal Soaring Association Inc, operated as a 14 CFR Part 91 personal flight, crashed while on approach for a forced landing at Coastal Airport, Pensacola, Florida. Visual meteorological conditions prevailed, and no flight plan was filed. The aircraft was substantially damaged, and the pilot sustained no injuries. The flight originated from the same airport about 10 minutes before the accident.

The pilot stated that when he was about 100 feet off the ground, the canopy suddenly opened. He had no indication that it would become unlatched. The canopy remained attached to the glider, hanging on the left side of the fuselage. The pilot kept climbing to 200 feet, released the towing latch, and performed a 180 degree turn to the left to return to the airport for landing. When he was approaching the runway, he realized that his sink rate was very high. While pulling up on the stick to try to clear a wooded area before the runway, the right wingtip brushed the top of a tree. The airplane stalled and crash into the ground about 300 feet before the runway. According to the pilot, the canopy's latching mechanism did not reveal any malfunctions during preflight or postcrash examination.

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.

Airframe/component/system failure/malfunctionTakeoff - initial climb
Window,canopy - openFactor
Forced landingDescent - emergency
Descent - excessivePilot in commandFactor
In flight collision with objectApproach
Object - tree(s)
Stall - inadvertentPilot in commandCause
In flight collision with terrain/waterEmergency descent/landing
Terrain condition - ground

Aircraft

Registration
N7631
Reported as
Schweizer SGS 1-34
Category
Glider
Serial number
11
Airframe hours
1,241
Engine
unknown
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Coastal Soaring Association
Airworthiness certificate
Standard, Normal
Last inspection
Annual · August 1, 1998 · 4 hours before
Departed
83J · FL
Airport
83J · Coastal Airport, runway 18, 2,500 × 250 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
43
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
106 total · 9 in this make and model · 36 as pilot in command · 6 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
90 °F

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 N7631 · 1

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