CEN25LA029

NTSB accident investigation · Cub Crafters Carbon CUB · Ogallala, NE · October 27, 2024

Accident · Minor injuriesClass 3 · LimitedFinal report
Date
October 27, 2024, 12:15 local (18:15 UTC)
Place
Ogallala, NE
Injuries
1 minor
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
N257STCub Crafters Carbon CUB
Defining event
Initial climb: Flight control sys malf/fail
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Central Region
Parties
FAA FSDO
FAA report
20241027016999A
Case key
195380

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 improper installation of the elevator control cable hardware, which resulted in the separation of the elevator control cable and a loss of pitch control in flight.

Findings · 3

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.

Flight control system: elevator control systemAircraft › Aircraft systems · Related maintenance infoRocky Mountain Stol CCK-2000: 1 caseAll aircraft: 74 casesProbable cause
Maintenance: installationPersonnel issues › Task performance · Owner/builderRocky Mountain Stol CCK-2000: 1 caseAll aircraft: 371 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 reported that he performed a flight control check before departing in his experimental, amateur-built airplane, and that the flight controls operated normally. During the initial climb, about 30 to 50 ft above ground level, the elevator control went slack. He could not regain elevator control and adjusted engine power in an attempt to regain control of the airplane’s pitch; however, the airplane descended and impacted the runway surface. The airplane skidded off the runway, the pilot egressed, and the airplane was destroyed by postimpact fire. A postaccident examination of the airplane found that the top elevator control cable was not attached to the elevator horn. The securing bolt, nut, and cotter pin were not located. The lower elevator control cable remained attached via its bolt, but the securing nut and cotter pin were not located. A review of maintenance information about the airplane revealed that the airplane was originally assembled about three years before the accident, and had undergone several condition inspections, including one by a mechanic who was different than the owner/builder. The most recent condition inspection was performed by the owner/builder about nine months before the accident, and would have included inspection of all flight control surfaces. There was no logbook record of any recent maintenance to the elevator, nor did the pilot recall any. Based on the available information, it is likely that the elevator control cable was improperly secured during maintenance; however, when the maintenance occurred could not be determined.

Factual narrative

On October 27, 2024, about 1215 central daylight time, an experimental, amateur-built CCK-2000 airplane, N257ST, was destroyed when it was involved in an accident near Ogallala, Nebraska. The pilot received minor injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot recalled doing a flight control check before the flight, during which he found the controls operated normally. During the initial climb, when the airplane was about 30 to 50 ft above ground level, the elevator control went slack. He could not regain elevator control and adjusted engine power in an attempt to regain control of the airplane’s pitch; however, the airplane descended and impacted the runway surface. The airplane skidded off the runway and a postimpact fire ensued. The pilot egressed, and the airplane was destroyed by the postimpact fire. A postaccident examination of the airplane found that top elevator control cable was not attached to the elevator horn (see figure 1). The securing bolt and nut were not located. The lower elevator control cable remained attached via its bolt, but the securing nut was not located. Figure 1. Elevator Control Connections (FAA Photo) After the airplane was originally assembled in 2021, it was inspected by a Federal Aviation Administration Designated Airworthiness Representative, who would have checked the build. It had subsequently undergone several annual condition inspections, including one by an airframe & powerplant mechanic who was different than the owner/builder. The most recent condition inspection was performed by the owner/builder about nine months before the accident, which would have included inspection of all flight control surfaces. Review of the airplane’s maintenance logs did not reveal any maintenance related to the elevator, nor did the owner/builder recall any recent maintenance on the elevator.

Aircraft

Registration
N257ST
Reported as
Cub Crafters Carbon CUB (EX3)
Category
Airplane, amateur-built
Serial number
CCK-2000-0059
Built
2021
Airframe hours
226
Engine
Carbon Cub CC363i, 186 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Registered owner
Rocky Mountain Stol LLC
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · January 1, 2024 · 59 hours before
Destination
KAPA · Englewood, CO
Airport
OGA · Searle Fld, runway 26, 5,102 × 75 ft, concrete
Equipment
Auto-pilot, Angle of attack indicator, ADS-B, Stall warning system, Satellite tracking device, Onboard weather, Electronic primary flight display, Electronic multifunction display

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
38
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Without waivers/limitations
Last flight review
May 24, 2023
Seat
Front
Restraint
4-point
Flight hours
360 total · 30 in this make and model · 303 as pilot in command · 34 in the last 90 days · 13 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 34 °F
Altimeter
30.12 inHg
Observed at
KOGA, 1 nm away
METAR
KOGA 271715Z AUTO 00000KT 10SM CLR 17/01 A3012 RMK AO2 T01700012

Docket · 6

The files NTSB released with the investigation on April 1, 2025, on NTSB’s docket system: statements, records, photos and specialists’ reports. 7.0 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.