SEA04CA105

NTSB accident investigation · Fetherolf Hatz CB-1 · Nampa, ID · June 16, 2004

Accident · No injuriesData collectionFinal report
Date
June 16, 2004, 12:00 local (18:00 UTC)
Place
Nampa, ID
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
NX26WFFetherolf Hatz CB-1
Weather
Visual (VMC) · Day
Status
Completed · report September 29, 2004
Report
Approved by Office Director
Case key
59446

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 of the tail wheel aircraft during an aborted landing. Factors include a slight tailwind, and a mound (berm) of earth in the area where the aircraft departed the side of the runway.

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.

Hard landingLanding - flare/touchdown
Lack of recent experience in type of aircraftPilot in commandFactor
Flare - improperPilot in command
Loss of control - on ground/waterLanding - flare/touchdown
Directional control - not maintainedPilot in commandCause
Weather condition - tailwindFactor
On ground/water encounter with terrain/waterGo-around (vfr)
Terrain condition - bermFactor
Gear collapsedLanding - roll

Analysis

The pilot came to the airport to regain takeoff and landing proficiency in the subject aircraft since he had not flown it for a "considerable period of time." After taking off from runway 29, he continued around the VFR pattern, and established the aircraft on a final approach for a three-point landing on the same runway. As he crossed the runway threshold at about 65 mph, he added a little power and started moving the control stick aft. The aircraft's nose then moved upwards, partially blocking the pilot's view of the runway, so he looked along the left side of the cowling in an attempt to keep the runway in sight. Although he expected the aircraft to slow rather quickly, it did not do so, and continued to float at a height of about five feet above the ground. The aircraft then suddenly dropped hard onto the runway and bounced back into the air. During this sequence, the pilot "lost visual orientation with the direction the plane was headed," so he added full power in an attempt to execute a go-around, but the aircraft dropped onto the runway a second time. According to the pilot, he then moved the stick to the "full back" position, but the aircraft did not lift off again, and instead exited the side of the runway where its left main gear impacted a mound of earth. At that point, the left main gear separated from the aircraft, which continued on for about another thirty yards before the right main gear collapsed, which resulted in significant damage to the wings and fuselage. After the accident, the pilot noticed that a slight tailwind was blowing. There was no evidence of any anomaly in the flight control or breaking system of the aircraft.

Factual narrative

On June 16, 2004, approximately 1200 mountain daylight time, an experimental Fetherolf Hatz CB-1, collided with the terrain during an attempted go-around at Nampa Municipal Airport, Nampa, Idaho. The private pilot, who was the sole occupant, was not injured, but the aircraft, which is owned and operated by the pilot, sustained substantial damage. The 14 CFR Part 91 personal pleasure flight, which was taking place within the confines of the VFR traffic pattern, was being operated in visual meteorological conditions. The aircraft had been airborne for about five minutes at the time of the accident. No flight plan had been filed.

According to the pilot, he came to the airport to regain takeoff and landing proficiency in the subject aircraft since he had not flown it for a "considerable period of time." After taking off from runway 29, he continued around the VFR pattern, and established the aircraft on a final approach for a three-point landing on the same runway. As he crossed the runway threshold at about 65 mph, he added a little power and started moving the control stick aft. The aircraft's nose then moved upwards, partially blocking the pilot's view of the runway, so he looked along the left side of the cowling in an attempt to keep the runway in sight. Although he expected the aircraft to slow rather quickly, it did not do so, and continued to float at a height of about five feet above the ground. The aircraft then suddenly dropped hard onto the runway and bounced back into the air. During this sequence, the pilot "lost visual orientation with the direction the plane was headed," so he added full power in an attempt to execute a go-around, but the aircraft dropped onto the runway a second time. According to the pilot, he then moved the stick to the "full back" position, but the aircraft did not lift off again, and instead exited the side of the runway where its left main gear impacted a mound of earth. At that point, the left main gear separated from the aircraft, which continued on for about another thirty yards before the right main gear collapsed, which resulted in significant damage to the wings and fuselage. The aircraft ultimately came to rest pointing 180 degrees from its final approach course heading.

The pilot further stated that after the accident, as he was exiting the aircraft, he noticed that the nearest wind sock was indicating a tailwind. According to both the pilot, and the FAA Inspector who responded to the scene, there was no evidence of any anomaly in the flight control or braking system of the aircraft.

Aircraft

Registration
NX26WF
Reported as
Fetherolf Hatz CB-1
Category
Airplane, amateur-built
Serial number
CB-1-222
Engine
Lycoming O-290-D, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Willis G. Fetherolf
Airworthiness certificate
Special, Experimental (Special)
Departed
S67 · Nampa, ID
Destination
S67

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
63
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3
Flight hours
155 total · 40 in this make and model · 4 in the last 90 days · 4 in the last 30 days

Weather

Conditions
Visual (VMC) · Day