DEN83FTE05

NTSB accident investigation · Schweizer 1-36 · Colo Springs, CO · January 6, 1983

Accident · No injuriesFinal report
Date
January 6, 1983, 10:40 local (17:40 UTC)
Place
Colo Springs, CO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N36166Schweizer 1-36
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19830106000589A
Case key
16009

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

On this page

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.

Abrupt maneuverManeuvering
Wing,spar - bentFactor
Wing,wing attachment bolt - distortedFactor
Wing,skin - buckledFactor
Fuselage - buckledFactor
Wing,skin - distortedFactor
Design stress limits of aircraft - exceededPilot in commandCause
Speed brakes - improper use ofPilot in commandCause
Airspeed - excessivePilot in commandCause

Analysis

The glider was substantially damaged during a pullup from a dive at altitude. The wing was rippled and beckled and damaged at the attach points. The dihedrial had changed from 6 degrees to 8.5 degrees. There was also unmeasured change in the sweepback. It is believed that the pilot achieved the airspeed estimated from the barograph at 146 mph by retracting the speed brakes during the dive. Maximum airspeed is 136 mph for this glider. The pilot does not recall the pullup except for negative g's at the top. Positive g forces were estimated at 10.5 to 11. The aircraft made a normal landing after the flight.

Aircraft

Registration
N36166
Reported as
Schweizer 1-36 (I-36)
Category
Glider
Serial number
10
Airframe hours
328
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Wave Flights, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · August 3, 1982 · 72 hours before

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
38
Certificate
Private
Airplane ratings
Multi-engine land, Single-engine land
Medical
Unknown, Unknown
Seat
Front
Flight hours
219 total · 9 in this make and model · 164 as pilot in command · 9 in the last 90 days · 9 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
100 statute miles
Lowest ceiling
None

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.