LAX96LA269

NTSB accident investigation · Bowles/Irwin Questair Venture · Groveland, CA · July 9, 1996

Accident · No injuriesLimited investigationFinal report
Date
July 8, 1996, 17:30 local (Jul 9, 1996, 00:30 UTC)
Place
Groveland, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N65VBowles/Irwin Questair Venture
Weather
Visual (VMC) · Day
Status
Completed · report August 25, 1997
Report
Approved by Office Director
FAA report
19960708017069A
Case key
29506

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 while landing in a crosswind. A contributing factor was related to the airplane's steering/handling characteristics.

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
Weather condition - crosswindFactor
Directional control - not maintainedPilot in commandCause
Nosewheel steering - inadequatePilot in commandFactor
Acft/equip,inadequate handling/perf capabilitiesOwner/builderFactor
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - ground

Analysis

The pilot of the experimental, amateur-built airplane, reported that his landing and initial rollout on runway 27 was uneventful. However, as the airplane decelerated he lost directional control. According to the pilot, he applied left rudder pedal and 'a little' left brake pressure to correct his alignment, but the airplane did not adequately respond. He further stated that he then 'made the mistake of moving the steering lever' to redirect the airplane, and he 'over controlled.' At this time, the airplane veered toward the left side of the runway and the pilot turned the steering lever to the right. The pilot again over controlled, and the airplane veered right exiting off the right side of the runway and into the ground. He further reported that he believes the design of the airplane was faulty in that the nose wheel was constructed too close to the main landing gear, and the three wheels formed an equilateral triangle. Also, the nose steering mechanism allowed too much play, and the airplane's steering was sensitive. In a crosswind, the weathercocking force allowed the nose wheel fork to turn and angle the airplane toward the edge of the runway. At the time of the accident the wind was from 290 degrees at 8 knots.

Factual narrative

On July 8, 1996, at 1730 hours Pacific daylight time, a Bowles/Irwin Questair Venture, N65V, landed on runway 27 at the Pine Mountain Lake Airport, Groveland, California. According to the pilot of the experimental, amateur-built airplane, he lost directional control during rollout. The airplane veered off the side of the runway, collided with terrain, and was substantially damaged. The commercial pilot was not injured. Visual meteorological conditions prevailed during the personal test flight, and no flight plan was filed. The flight originated from Groveland at 1630.

The pilot reported that he made a normal touchdown, and the beginning of the landing rollout was uneventful. Gradually, the airplane rolled toward the right side of the runway. The pilot stated that he applied left rudder pedal and "a little" left brake pressure to correct his alignment, but that the airplane did not adequately respond. He further stated that he then made the mistake of moving the steering lever to redirect the airplane, and he "over corrected." At this time, the airplane veered toward the left side of the runway and the pilot turned the steering lever to the right. The pilot reported that he again over corrected the airplane, it veered off the right side of the runway, and its nose dug into the ground.

The pilot reported that he believes the design of the airplane is faulty in that the nose wheel was constructed too close to the main landing gear, and the three wheels formed an equilateral triangle. Also, the nose steering mechanism allowed for too much play. In a crosswind, the weathercocking force allowed the nose wheel fork to turn and angle the airplane toward the edge of the runway. The pilot further stated that although his airplane's steering is sensitive, he did not experience any mechanical failures or malfunctions during the flight.

At the time of the accident the wind was from 290 degrees at 8 knots.

Aircraft

Registration
N65V
Reported as
Bowles/Irwin Questair Venture (QUESTAIR V)
Category
Airplane, amateur-built
Serial number
66
Airframe hours
22
Engine
Continental IO-550-G, 280 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Wayne Irwin
Registered owner
Howard W. Bowles
Airworthiness certificate
Special, Experimental (Special)
Departed
Q68
Destination
Q68
Airport
Q68 · Pine Mountain Lake, runway 27, 3,625 × 50 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
68
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
2,900 total · 25 in this make and model · 25 in the last 90 days · 20 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
290° at 8 knots
Visibility
30 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.