ERA25LA070

NTSB accident investigation · William M Clapp CLAPP-SABERWING · Valdosta, GA · December 7, 2024

Accident · Serious injuriesClass 4 · LimitedFinal report
Date
December 7, 2024, 16:27 UTC
Place
Valdosta, GA
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N100SWWilliam M Clapp CLAPP-SABERWING
Defining event
Landing-flare/touchdown: Hard landing
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20241207021179A
Case key
199398

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

A hard landing and subsequent gear collapse due to the pilot’s failure to securely close the airplane canopy and its subsequent opening on short final.

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.

Doors: passenger/crew doorsAircraft › Aircraft structures · Incorrect use/operationWilliam M Clapp CLAPP-SABERWING: 1 caseAll aircraft: 86 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 private pilot was practicing takeoffs and landings and reported that while maneuvering through the traffic pattern, the canopy became partially opened. The canopy was equipped with two side latches and one main latch at the rear of the canopy. The right-side latch held the canopy partially secured until the final approach segment when it also released, and the canopy opened completely. The airplane subsequently nosed down and contacted the ground nose first just short of the runway whereupon the nose landing gear separated from the airplane and the main landing gear collapsed, which resulted in substantial damage to the fuselage. The pilot was seriously injured. The pilot reported forgetting to lock the main rear latch to the canopy after opening it during taxi. The pilot reported that there were no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Aircraft

Registration
N100SW
Reported as
William M Clapp CLAPP-SABERWING
Category
Airplane, amateur-built
Serial number
CLAPP05
Built
2019
Airframe hours
70
Engine
Corvair Corvair/spider, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · November 1, 2024 · 15 hours before
Airport
VLD · Valdosta Regional, runway 36, 8,003 × 150 ft, asphalt
Equipment
Unknown

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
50
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Medical
BasicMed, Without waivers/limitations
Last flight review
November 30, 2024
Seat
Left
Restraint
3-point
Flight hours
359 total · 12 in this make and model · 321 as pilot in command · 24 in the last 90 days · 7 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
60° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
54 °F, dew point 19 °F
Altimeter
30.39 inHg
Observed at
VLD
METAR
KVLD 071653Z 06005KT 10SM CLR 12/M07 A3039 RMK AO2 SLP300 T01171067

Docket · 3

The files NTSB released with the investigation on April 22, 2025, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.7 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.