GAA20CA043

NTSB accident investigation · Zenair Zenith 801 · Knoxville, TN · October 18, 2019

Accident · No injuriesData collectionFinal report
Date
October 18, 2019, 13:00 local (17:00 UTC)
Place
Knoxville, TN
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N801PZZenair Zenith 801
Defining event
Landing-flare/touchdown: Hard landing
Weather
Visual (VMC) · Day
Status
Completed · report May 21, 2020
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20191018017449A
Case key
100478

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 a proper descent rate during the approach and his improper landing flare, which resulted in a hard landing.

Findings · 4

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: landing flareAircraft › Aircraft oper/perf/capability · Not attained/maintainedDaniel F Niendorff ZENITH 801: 1 caseAll aircraft: 1,285 casesProbable cause
Performance/control parameters: descent rateAircraft › Aircraft oper/perf/capability · Not attained/maintainedDaniel F Niendorff ZENITH 801: 1 caseAll aircraft: 242 casesProbable cause
Wind: variable windEnvironmental issues › Conditions/weather/phenomena · Effect on operationDaniel F Niendorff ZENITH 801: 1 caseAll aircraft: 113 cases

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 a power-off 180° approach, he noticed the airplane was "drifting" and would not reach the intended touchdown point. He added power to correct and then reduced the power to idle to resume the approach. On short final, the airplane encountered a "wind shift or gust" and developed a high sink rate. He applied power and lowered the nose, but the airplane landed hard. The airplane sustained substantial damage to the 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 a power-off 180° approach, he noticed he was "drifting" and would not make the intended touchdown point. He added power to correct, and then reduced the power to idle to resume the approach. On short final, the airplane encountered a "wind shift or gust" and developed a high sink rate. He applied power and lowered the nose, but the airplane landed hard. The airplane sustained substantial damage to the fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The airport's automated weather observation station reported that, about 5 minutes before the accident, the wind was variable at 3 knots. The pilot landed the airplane on runway 08.

Aircraft

Registration
N801PZ
Reported as
Zenair Zenith 801 (No Series)
Category
Airplane, amateur-built
Serial number
8-4758
Built
2017
Airframe hours
180
Engine
Aerosport Power IO-375-B2BEMS, 195 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · June 16, 2019
Departed
TN98 · Knoxville, TN
Destination
DKX · Knoxville, TN
Airport
DKX · Knoxville Downtown Island, runway 08, 3,499 × 75 ft, asphalt
Equipment
Electronic flight bag or handheld device, Electronic multifunction display, Auto-pilot, ADS-B, Electronic primary flight 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
47
Injuries
None
Certificate
Private
Airplane ratings
Multi-engine land, Single-engine land
Medical
BasicMed
Last flight review
September 30, 2019
Seat
Left
Restraint
5-point
Flight hours
350 total · 199 in this make and model · 306 as pilot in command · 30 in the last 90 days · 9 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Temperature
63 °F, dew point 43 °F
Altimeter
30.06 inHg
Observed at
KDKX

Docket · 2

The files NTSB released with the investigation on December 19, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.1 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.