GAA18CA473

NTSB accident investigation · Vans RV6 · Greeley, CO · August 4, 2018

Accident · Serious injuriesData collectionFinal report
Date
August 4, 2018, 11:30 local (17:30 UTC)
Place
Greeley, CO
Injuries
1 serious, 1 minor
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N56LKVans RV6
Defining event
Landing: Abnormal runway contact
Weather
Visual (VMC) · Day
Status
Completed · report March 18, 2019
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20180804010009A
Case key
98009

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 exceedance of the airplane’s critical angle of attack during approach, which resulted in an aerodynamic stall.

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: angle of attackAircraft › Aircraft oper/perf/capability · Capability exceededKlingmuller Lothar M L RV-6A: 1 caseAll aircraft: 990 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, during approach, the airplane encountered the usual amount of sink, so he added power but applied too much back stick. The airplane aerodynamically stalled, landed hard, and then came to rest 1,500 ft down the runway. The airplane sustained substantial damage to the right wing and fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Factual narrative

The pilot reported that, during approach, he airplane encountered the usual amount of sink, he added power, but applied too much back stick. The airplane aerodynamically stalled, landed hard, and the airplane came to rest 1,500 ft down the runway. The airplane sustained substantial damage to the right wing and fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Aircraft

Registration
N56LK
Reported as
Vans RV6 (A)
Category
Airplane, amateur-built
Serial number
123
Built
2001
Airframe hours
1,300
Engine
Lycoming O-360-A1A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · May 1, 2018
Departed
FTG · Denver, CO
Destination
GXY · Greeley, CO
Airport
GXY · Greeley-Weld County, runway 10, 5,801 × 100 ft, asphalt
Equipment
ADS-B, Auto-pilot, 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
85
Injuries
Serious
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Without waivers/limitations
Last flight review
August 30, 2016
Seat
Left
Restraint
3-point
Flight hours
6,866.3 total · 25.7 in this make and model · 6,393.6 as pilot in command · 25.7 in the last 90 days · 4.1 in the last 30 days · 0.6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
None
Temperature
90 °F, dew point 50 °F
Altimeter
30.01 inHg
Observed at
KGXY, 1 nm away

Docket · 2

The files NTSB released with the investigation on October 31, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.0 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.