DEN84LA029

NTSB accident investigation · Piper PA-18-180 · Colorado Spgs, CO · November 19, 1983

Accident · No injuriesLimited investigationFinal report
Date
November 19, 1983, 10:28 local (17:28 UTC)
Place
Colorado Spgs, CO
Injuries
3 uninjured
Phase of flight
Takeoff
Aircraft
N3594PPiper PA-18-180N4246LBurkhart Grob G103
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Case key
16293

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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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.

In flight collision with terrain/waterTakeoff
Preflight planning/preparation - inadequatePilot in commandCause
Weather condition - high density altitudeFactor
Weather condition - tailwindFactor
Weather condition - gustsFactor
Airspeed - inadequatePilot in command
Stall/mush - improper use ofPilot in commandCause
Terrain condition - snow coveredFactor
Nose overTakeoff
On ground/water collision with objectStanding
Weather condition - whiteoutFactor
Visual lookout - not possiblePilot of other aircraft
In flight collision with objectTakeoff
Preflight planning/preparation - inadequatePilot of other aircraftCause
Weather condition - high density altitudeFactor
Weather condition - tailwindFactor
Weather condition - gustsFactor
Airspeed - inadequatePilot of other aircraft
Stall/mush - inadvertentPilot of other aircraftCause
Terrain condition - snow coveredFactor
Aborted takeoff
Weather condition - whiteoutFactor
Visual lookout - not possibleDual student
Visual lookout - not possiblePilot in command(cfi)
Object - aircraft parked/standingFactor

Analysis

The Piper PA-18, N3594P, was being used to tow a burkhart grob flugzeugbau G103 twin astir, N4246L. At 0950 MST, the wind was reported from 310 deg at 9 KTS. Since the terrain sloped downhill to the south, rwy 17R (covered with hard packed snow) was being used for takeoff. The glider club had a policy that all takeoffs would be made to the south, but no takeoffs were permitted if the tailwind exceeds 20 KTS. The tow plt reported that during takeoff, a quartering rear gust of wind was encountered & forced the acft back onto the rwy. The acft touched down at the end of the rwy, rolled into snow & nosed over. The instructor plt (CFI) in the glider reported the glider had just lifted off when he saw the tow plane settle to the ground & disappear in a cloud of snow. The glider student relearse the tow rope. The glider entered the cloud of snow. When it emerged from the cloud, the glider aircrew saw the inverted tow plane immediately ahead. The left wing of the glider hit the right main gear of the tow plane. Tow plt EST gusts, 15 KTS.

The Piper PA-18, N3594P, was being used to tow a burkhart grob flugzeubau G103 twin astir, N4246L. At 0950 MST, the wind was reported from 310 deg at 9 KTS. Since the terrain sloped downhill to the south, rwy 17R (covered with hard packed snow) was being used for takeoff. The glider club had a policy that all takeoffs would be made to the south, but no takeoffs were permitted if the tailwind exceed 20 KTS. The tow plt reported that during takeoff, a quartering rear gust of wind was encountered & forced the acft back onto the rwy. The acft touch down at the end of the rwy, rolled into snow & nosed over. The instructor plt (CFI) in the glider reported the glider had just lifted off when he saw the tow plane settle to the ground & disappear in a cloud of snow. The glider student released the tow rope. The glider entered the cloud of snow. When it emerged from the cloud, the glider aircrew saw the inverted tow plane immediately ahead. The left wing of the glider hit the right main gear of the tow plane. Tow plt EST gusts, 15 KTS.

Aircraft · 2

Registration
N3594P
Reported as
Piper PA-18-180
Category
Airplane
Serial number
18-4552
Airframe hours
8,046
Engine
Lycoming O-360-A3A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Other work use · Part 91
Registered owner
Wave Flights, Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · June 13, 1983
Airport
CO26 · Black Forest, runway 17R, 1,000 × ft, snow

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.

Registration
N4246L
Reported as
Burkhart Grob G103
Category
Glider
Serial number
3609
Airframe hours
673
Engine
unknown
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Waye Flights, Inc.
Registered owner
Craig Thompson
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · September 1, 1983
Airport
CO26 · Black Forest, runway 17R, 1,000 × ft, snow

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot, aircraft N3594P
Age
49
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
6,000 total · 862 in this make and model · 15 in the last 90 days
Role
Pilot, aircraft N4246L
Age
60
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
5,100 total · 30 in this make and model · 4,720 as pilot in command · 90 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
310° at 9 knots
Visibility
100 statute miles
Lowest ceiling
25,000 ft broken
Temperature
34 °F, dew point 16 °F
Altimeter
29.00 inHg
Observed at
COS, 10 nm away

FAA reports on this event · 2

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

Other investigations on N3594P · 1

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