GAA18CA179

NTSB accident investigation · Lynn Perry Cavalon · Haverhill, NH · March 26, 2018

Accident · No injuriesData collectionFinal report
Date
March 26, 2018, 10:15 local (14:15 UTC)
Place
Haverhill, NH
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N442AGLynn Perry Cavalon
Defining event
Takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report July 5, 2018
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20180326010229A
Case key
96928

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

On this page

Probable cause

The pilot's failure to maintain directional control during a rejected takeoff. Contributing to the accident was the binding of the control stick, for an undetermined reason, which precipitated the rejected takeoff.

Findings · 2

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedLynn Perry CAVALON: 1 caseAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotLynn Perry CAVALON: 1 caseAll aircraft: 9,295 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot of the gyroplane reported that, during the takeoff roll, after the front landing gear became light, he attempted to push the control stick forward, but was unable. He then used both hands in an attempt to push the stick forward. He realized he could not move the control stick forward and therefore could not control the gyroplane. He rejected the takeoff by reducing power, the gyroplane veered to the left, and the rotor struck the runway. Subsequently, the gyroplane rolled onto its left side, skidded down the runway, exited the left side of the runway, and impacted a snowbank. The gyroplane sustained substantial damage to the rotor system and fuselage. The pilot reported that he removed the rotor blade by removing the center pivoting bolt, and in doing so, the rotor head moved forward and freed the stick. The Federal Aviation Administration sent two inspectors to examine the gyroplane. During the visit, the rotor head moved freely in all directions with no evidence of binding or restriction, and no discrepancies were noted with the torque tube or cabling in the keel tube. The brake and trim controls were also moved in various sequences and control positions, but there were no discrepancies found. The FAA inspector added that, with an inadvertent and or unnoticed activation of full aft trim prior to beginning the takeoff roll, there could be enough resistance created to generate the conditions the pilot experienced.

Factual narrative

The pilot of the gyroplane reported that, during the takeoff roll, after the front landing gear became light, he attempted to push the control stick forward, but was unable. He then used both hands in an attempt to push the stick forward. He realized he could not move the control stick forward and therefore could not control the gyroplane. He rejected the takeoff by reducing power, the gyroplane veered to the left, and the rotor struck the runway. Subsequently, the gyroplane rolled onto its left side, skidded down the runway, exited the left side of the runway, and impacted a snowbank. The gyroplane sustained substantial damage to the rotor system and fuselage. The pilot reported that he removed the rotor blade by removing the center pivoting bolt, and in doing so, the rotor head moved forward and freed the stick. The Federal Aviation Administration sent two inspectors to examine the gyroplane. During the visit, the rotor head moved freely in all directions with no evidence of binding or restriction, and no discrepancies were noted with the torque tube or cabling in the keel tube. The brake and trim controls were also moved in various sequences and control positions, but there were no discrepancies found. The FAA inspector added that, with an inadvertent and or unnoticed activation of full aft trim prior to beginning the takeoff roll, there could be enough resistance created to generate the conditions the pilot experienced.

Aircraft

Registration
N442AG
Reported as
Lynn Perry Cavalon (NO SERIES)
Category
Gyroplane, amateur-built
Serial number
V00311
Built
2017
Airframe hours
57.8
Engine
Rotax 914UL, 115 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · July 16, 2017
Departed
5B9 · Haverhill, NH
Destination
5B9 · Haverhill, NH
Airport
5B9 · Dean Memorial, runway 01, 2,511 × 58 ft, asphalt
Equipment
Handheld GPS

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
65
Injuries
None
Certificates
Private, Sport Pilot
Airplane ratings
Single-engine land
Medical
BasicMed, Without waivers/limitations
Last flight review
August 4, 2017
Seat
Right
Restraint
3-point
Flight hours
1,831 total · 77 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
32 °F, dew point 18 °F
Altimeter
30.75 inHg
Observed at
K1P1, 21 nm away

Docket · 3

The files NTSB released with the investigation on May 16, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.4 MB in all.

FAA reports on this event · 1

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