National Transportation Safety Board
Aviation Accident Final Report

 

 

Location:

Kapolei, HI

Accident Number:

WPR18LA065

Date & Time:

01/13/2018, 0945 HST

Registration:

N413Z

Aircraft:

Just JA30 SUPERSTOL

Aircraft Damage:

Substantial

Defining Event:

Landing gear collapse

Injuries:

1 None

Flight Conducted Under:

Part 91: General Aviation - Personal

Analysis

 

The pilot reported that, while landing at an airport after the personal flight, the airplane ground looped. The pilot visually inspected the airplane and found no damage. He then took off and flew to another airport. The pilot reported that, after touchdown at a speed of about 30 mph, the airplane veered sharply, and the right landing gear suspension strut collapsed. After the accident, the pilot discovered that the right suspension strut separated from the airplane; it was found on the runway near the touchdown point.

A metallurgical examination of the strut revealed that the separation features were consistent with an overload type of failure; however, it could not be determined when the event leading to the overload occurred.

 

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
 

The collapse and separation of the right landing gear suspension strut due to overload.

 

Findings

Aircraft

Main gear strut/axle/truck - Capability exceeded (Cause)

Factual Information

 

On January 13, 2018, at 0945 Hawaii-Aleutian standard time, an experimental JA30 Superstol airplane, N413Z, was substantially damaged during landing at Kalaeloa Airport /John Rodgers Field (PHJR), Kapolei, Hawaii. The private pilot was not injured. The airplane was registered to and operated by the pilot as a Title 14 Code of Federal Regulations Part 91 personal flight. Visual meteorological conditions prevailed and no flight plan was filed. The flight originated from Dillingham Airfield (PHDH), Mokuleia, Hawaii, at 0904.

The pilot reported in a written statement that during the landing at PHDH, he had some difficulty with the suspension system and the airplane ground looped. The pilot did a visual inspection of the airplane and found no damage. The pilot then took off and flew to PHJR for landing. After touchdown at a speed of about 30 mph, the airplane veered sharply and the right landing gear strut collapsed. After the accident, the pilot discovered that the right suspension strut separated from the airplane and it was found on the runway near the touchdown point.

The suspension strut was sent to the NTSB Materials Laboratory for examination. The metallurgist reported that the separation features were consistent with an overload type of failure.

 

 

History of Flight

Landing-landing roll

Landing gear collapse (Defining event)

Loss of control on ground

 

 

Pilot Information

Certificate:

Private

Age:

73, Male

Airplane Rating(s):

Multi-engine Land; Single-engine Land

Seat Occupied:

Left

Other Aircraft Rating(s):

None

Restraint Used:

 

Instrument Rating(s):

None

Second Pilot Present:

No

Instructor Rating(s):

None

Toxicology Performed:

No

Medical Certification:

Sport Pilot With Waivers/Limitations

Last FAA Medical Exam:

 

Occupational Pilot:

No

Last Flight Review or Equivalent:

02/16/2017

Flight Time:

(Estimated) 3465 hours (Total, all aircraft), 20 hours (Total, this make and model), 40 hours (Last 90 days, all aircraft), 15 hours (Last 30 days, all aircraft), 2.4 hours (Last 24 hours, all aircraft)

 

 

Aircraft and Owner/Operator Information

Aircraft Make:

Just

Registration:

N413Z

Model/Series:

JA30 SUPERSTOL Undesignat

Aircraft Category:

Airplane

Year of Manufacture:

2016

Amateur Built:

Yes

Airworthiness Certificate:

Experimental Light Sport

Serial Number:

JA435-01-15

Landing Gear Type:

Tailwheel

Seats:

2

Date/Type of Last Inspection:

01/01/2017, Annual

Certified Max Gross Wt.:

1320 lbs

Time Since Last Inspection:

 

Engines:

1 Reciprocating

Airframe Total Time:

61 Hours at time of accident

Engine Manufacturer:

Rotex

ELT:

Installed, not activated

Engine Model/Series:

912ULS

Registered Owner:

On file

Rated Power:

100 hp

Operator:

On file

Operating Certificate(s) Held:

None

 

Meteorological Information and Flight Plan

Conditions at Accident Site:

Visual Conditions

Condition of Light:

Day

Observation Facility, Elevation:

PHNL, 7 ft msl

Distance from Accident Site:

8 Nautical Miles

Observation Time:

1853 UTC

Direction from Accident Site:

83°

Lowest Cloud Condition:

Few / 7000 ft agl

Visibility

10 Miles

Lowest Ceiling:

 

Visibility (RVR):

 

Wind Speed/Gusts:

Calm /

Turbulence Type Forecast/Actual:

/

Wind Direction:

 

Turbulence Severity Forecast/Actual:

/

Altimeter Setting:

30.05 inches Hg

Temperature/Dew Point:

24°C / 18°C

Precipitation and Obscuration:

No Obscuration; No Precipitation

Departure Point:

Waialua, HI (HDH)

Type of Flight Plan Filed:

None

Destination:

Kapolei, HI (HJR)

Type of Clearance:

VFR

Departure Time:

0904 HST

Type of Airspace:

Class D

 

Airport Information

Airport:

KALAELOA (JOHN RODGERS FIELD) (JRF)

Runway Surface Type:

Asphalt; Concrete

Airport Elevation:

30 ft

Runway Surface Condition:

Dry

Runway Used:

11

IFR Approach:

None

Runway Length/Width:

6000 ft / 200 ft

VFR Approach/Landing:

Traffic Pattern

 

Wreckage and Impact Information

Crew Injuries:

1 None

Aircraft Damage:

Substantial

Passenger Injuries:

N/A

Aircraft Fire:

None

Ground Injuries:

N/A

Aircraft Explosion:

None

Total Injuries:

1 None

Latitude, Longitude:

21.307222, -158.070278 (est)

 


 


Administrative Information

Investigator In Charge (IIC):

Maja Smith

Report Date:

06/03/2020

Additional Participating Persons:

 

Publish Date:

06/03/2020

Note:

The NTSB did not travel to the scene of this accident.

Investigation Docket:

http://dms.ntsb.gov/pubdms/search/dockList.cfm?mKey=96601