ERA12CA129

NTSB accident investigation · Koth Larry Jabiru Calypso · Mansfield, MA · December 30, 2011

Accident · Minor injuriesData collectionFinal report
Date
December 30, 2011, 12:00 local (17:00 UTC)
Place
Mansfield, MA
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N344MKKoth Larry Jabiru Calypso
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report March 27, 2012
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20111230029389A
Case key
82592

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 did not maintain directional control during landing. Contributing to the accident was the pilot’s not closing the throttle upon landing and his improper adjustment of the airplane’s brakes.

Findings · 5

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: surface speed/brakingAircraft › Aircraft oper/perf/capability · Not attained/maintainedKoth Larry JABIRU CALYPSO: 1 caseAll aircraft: 238 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedKoth Larry JABIRU CALYPSO: 1 caseAll aircraft: 3,958 casesProbable cause
Engine controls: power leverAircraft › Aircraft power plant · Incorrect use/operationKoth Larry JABIRU CALYPSO: 1 caseAll aircraft: 95 casesProbable cause
Use of equip/infoPersonnel issues › Task performance · PilotKoth Larry JABIRU CALYPSO: 1 caseAll aircraft: 111 casesProbable cause
Aircraft capability: braking capabilityAircraft › Aircraft oper/perf/capability · Not specifiedKoth Larry JABIRU CALYPSO: 1 caseAll aircraft: 57 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/owner was practicing takeoffs and landings in the recently certificated experimental amateur-built airplane. After completing an adjustment of the left wing to control a rolling tendency, as well as multiple adjustments to the hand-operated brakes, the pilot performed a short flight over the runway and landed about 400 feet beyond the point of takeoff. The airplane touched down about 55 knots airspeed, and the pilot applied the brakes. The airplane veered, did not slow, and departed the left side of the runway. The airplane continued about 900 feet after touchdown before it collided with terrain and came to rest inverted, resulting in substantial damage to the wings. After the accident, the pilot could not recall if he had reduced the throttle upon landing. Examination of the cockpit revealed that the flight controls, engine controls, and the hand-operated brake control were of a nonstandard configuration, and all had matching red handles. It was also noted that application of the brakes required the pilot to release the control stick. Examination of the braking system revealed binding of the left brake caliper and disk, missing washers from the right brake caliper, distortion of the left and right inner lining plates over the piston of each brake assembly, and compression of the return springs. Other than the known wing and brake anomalies, the pilot reported no mechanical deficiencies with the airplane.

Factual narrative

The pilot/owner was practicing takeoffs and landings in the recently certificated experimental amateur-built airplane at the time of the accident. After completing an adjustment of the left wing to control a rolling tendency, as well as multiple adjustments to the hand-operated brakes, the pilot performed a short flight over the runway, and landed back about 400 feet beyond the point of takeoff. The airplane touched down about 55 knots airspeed, and the pilot applied the brakes. The airplane did not slow and departed the left side of the runway. The airplane continued approximately 900 feet after touchdown, before it collided with terrain, and came to rest inverted resulting in substantial damage to the wings. After the accident, the pilot could not recall if he had reduced the throttle upon landing. Examination of the cockpit revealed that the flight controls, engine controls, and the hand-operated brake control were of a non-standard configuration, and all had matching red handles. It was also noted that application of the brakes required the pilot to release the control stick. Other than the known wing and brake anomalies, the pilot reported no mechanical deficiencies with the airplane.

Aircraft

Registration
N344MK
Reported as
Koth Larry Jabiru Calypso
Category
Airplane, amateur-built
Serial number
627
Engine
Jabiru 2200, 85 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Lafratta Paul M
Registered owner
Lafratta Paul M
Airworthiness certificate
Special, Experimental (Special)
Departed
1B9 · Mansfield, MA
Destination
1B9 · Mansfield, MA
Airport
1B9 · Mansfield Municipal Airport, runway 32, 3,500 × 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
65
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
August 15, 2011
Flight hours
2,404 total · 4 in this make and model · 6 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
9,000 ft overcast
Temperature
45 °F, dew point 28 °F
Altimeter
30.04 inHg
Observed at
TAN, 11 nm away

Docket · 8

The files NTSB released with the investigation on January 30, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 8.7 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.