FTW97LA017

NTSB accident investigation · Piper PA-18-135 · Boulder, CO · October 12, 1996

Accident · No injuriesLimited investigationFinal report
Date
October 12, 1996, 14:30 local (20:30 UTC)
Place
Boulder, CO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N9967QPiper PA-18-135
Weather
Visual (VMC) · Day
Status
Completed · report February 1, 1997
Report
Approved by Office Director
FAA report
19961012032249A
Case key
20092

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 failure to maintain directional control and his improper use of rudder. A factor was the pilot's lack of total experience in the make and model of airplane.

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.

Loss of control - on ground/waterLanding - roll
Directional control - not maintainedPilot in commandCause
Rudder - improper use ofPilot in commandCause
Lack of total experience in type of aircraftPilot in commandFactor
On ground/water encounter with terrain/waterLanding

Analysis

The pilot landed in a 3-point attitude on runway 8 and allowed the wind (estimated to vary between 270 and 300 degrees at 6 to 9 knots) to get underneath the upwind wing. He said the airplane drifted left of the runway centerline, and he corrected with opposite aileron and rudder 'somewhat excessively.' As the airplane returned to the runway centerline, he applied left rudder, again 'somewhat excessively.' The pilot said the airplane veered to the left and he applied 'right rudder aggressively.' The airplane swerved to the right. Side loads were imposed, the left tire separated from the wheel rim, and the airplane ground looped. The pilot indicated he had logged 4 hours in the airplane in the previous 90 days. Three of the four hours were with an instructor. The accident flight was the pilot's first flight in the airplane as pilot-in-command.

Factual narrative

On October 12, 1996, approximately 1430 mountain daylight time, a Piper PA-18-135, N9967Q, was substantially damaged when it collided with terrain during landing at Boulder, Colorado. The commercial pilot was not injured. Visual meteorological conditions prevailed. No flight plan was filed for the personal flight conducted under Title 14 CFR Part 91. The flight originated at Boulder, Colorado, on October 12, 1996, 1330.

According to the Pilot/Operator Aircraft Accident report, the pilot had been practicing touch and go landings on runway 08 for about an hour. On his last landing, he touched down in a 3-point attitude. He allowed the wind (estimated to vary between 270 and 300 degrees at 6 to 9 knots) to get underneath the upwind wing. The pilot said the airplane drifted left of runway centerline, and he corrected with opposite aileron and rudder "somewhat excessively." As the airplane returned to runway centerline he applied left rudder, again "somewhat excessively." The airplane veered to the left. To avoid a parallel glider landing strip, the pilot applied "right rudder aggressively." The airplane swerved to the right. Side loads caused the left tire to separate from the wheel rim and "induce a skidding 180 degree turn to the right." The airplane departed the right side of the runway tail first. The left wing struck the ground and the airplane pivoted around on its wing tip.

In his accident report, the pilot indicated he had logged 4 hours in the Piper PA-18-135 in the previous 90 days. Three of the 4 hours were with an instructor. The accident flight was his first flight in the airplane as pilot in command.

Aircraft

Registration
N9967Q
Reported as
Piper PA-18-135
Category
Airplane
Serial number
18-4012
Airframe hours
4,323
Engine
Lycoming O-290-D2, 135 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Dakota Ridge Aviation
Registered owner
Terence F. Danton
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · October 12, 1996
Departed
1V5
Destination
1V5
Airport
1V5 · Boulder Municipal, runway 8R, 4,100 × 75 ft, asphalt

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
44
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
304 total · 4 in this make and model · 231 as pilot in command · 14 in the last 90 days · 4 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 9 knots
Visibility
60 statute miles
Lowest ceiling
None
Temperature
82 °F
Altimeter
30.00 inHg
Observed at
BJC, 9 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 N9967Q · 2

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