ERA21LA366

NTSB accident investigation · Sproul Keith A 83K-16 · Ryegate, VT · September 12, 2021

Accident · No injuriesClass 4 · LimitedFinal report
Date
September 12, 2021, 08:30 local (12:30 UTC)
Place
Ryegate, VT
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N83KXSproul Keith A 83K-16
Defining event
Landing: Collision during takeoff/land
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
20210912015599I
Case key
103890

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 secure himself to the balloon seat which resulted in a loss of control of the balloon.

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.

Use of equip/infoPersonnel issues › Task performance · PilotSproul Keith A 83K-16: 1 caseAll aircraft: 111 casesProbable cause
Performance/control parameters: descent/approach/glide pathAircraft › Aircraft oper/perf/capability · Not attained/maintainedSproul Keith A 83K-16: 1 caseAll aircraft: 809 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Contributed to outcomeSproul Keith A 83K-16: 1 caseAll aircraft: 933 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 and passenger departed early for a day of ballooning. As they approached the selected landing area, the pilot started a descent to slow the balloon in slower winds. As the balloon neared the treetops, the wind direction shifted slightly, which resulted in the balloon colliding with a tree. During the flight, and unbeknownst to the pilot, his lapbelt had become unsecured, and after the impact with the tree, he slid forward in the seat and held on to the uprights of the chair to prevent falling from the balloon. In this position the pilot could no longer control the balloon and remained holding onto the frame as the balloon went through the trees, which resulted in substantial damage to the envelope and frame. The pilot reported that the balloon had no preimpact mechanical malfunctions or failures that would have precluded normal operation.

Aircraft

Registration
N83KX
Reported as
Sproul Keith A 83K-16
Category
Balloon, amateur-built
Serial number
S-005
Built
2019
Airframe hours
140
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Balloon
Last inspection
Condition · July 13, 2021
Departed
2B9 · Post Mills Airport, VT
Equipment
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
62
Injuries
None
Certificate
Commercial
Last flight review
January 8, 2021
Seat
None
Restraint
None
Flight hours
2,253 total · 140 in this make and model · 253 as pilot in command · 83 in the last 90 days · 19 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
210° at 12 knots, gusting 20
Visibility
10 statute miles
Lowest ceiling
None
Temperature
70 °F, dew point 57 °F
Altimeter
29.97 inHg
Observed at
MPV, 19 nm away
METAR
KMPV 121351Z AUTO 21012G20KT 10SM CLR 21/14 A2997 RMK AO2 SLP146 T02110144

Docket · 3

The files NTSB released with the investigation on May 5, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.9 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.