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NTSB Report

March 18, 2000 · Adams A55S · N4035T

Los Lunas, NM

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
March 18, 2000
Injury Outcomes
3 injuries (3 minor injuries)
Location
Los Lunas, NM
Aircraft
Adams A55S
Tail Number
N4035T
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
DEN00LA062

The St. Patrick's Balloon Rally weather briefing indicated calm surface winds. Winds aloft were greater than 20 knots, and the level was expected to drop later that morning. On a previous flight, the winds aloft had been negligible, then varied between southeasterly at 5 knots to westerly at 3 knots. On a later flight, the wind was 'variable and slow,' then became 'predominantly to the west at approximately 2 to 3 knots.' The pilot landed the balloon in an open field 'unassisted and standing up.' The envelope was not deflated at that time because the wind was calm and the chase crew had not yet arrived. When the chase crew did arrive, 'the wind seemed to change direction to the southeast,' and wind speed 'increased dramatically...from the northwest at approximately 10 to 15 knots.' The balloon ascended about 15 to 20 feet. The balloon 'throat collapsed and [the pilot] could not burn to compensate for false lift.' He attempted to vent the envelope, but the top would not open because it was cold from standing on the ground. The false lift dissipated, the balloon struck the ground, and was dragged across the field.

NTSB Probable Cause

The pilot's decision not to deflate the envelope. A factor was the wind gust.

Full Narrative

On March 18, 2000, approximately 0950 mountain standard time, an Adams A55S, N4035T, registered to and operated by the pilot, was substantially damaged when it collided with terrain during landing near Los Lunas, New Mexico. The private pilot and two passengers sustained minor injuries. Visual meteorological conditions prevailed, and no flight plan had been filed for the personal flight being conducted under Title 14 CFR Part 91. The flight originated near Los Lunas at 0910. The pilot was participating in the St. Patrick's Balloon Rally. A weather briefing was given to all participants. Calm surface winds were reported, and winds aloft were greater than 20 knots. The higher wind level was expected to drop later that morning. The pilot said that on a previous flight, the winds aloft had been negligible, then varied between southeasterly at 5 knots to westerly at 3 knots. He landed in an open field at 0900 to change passengers. The pilot said that during the second flight, the wind was "variable and slow," then became "predominantly to the west at approximately 2 to 3 knots." The pilot then landed the balloon in an open field "unassisted and standing up." The envelope was not deflated at that time because the wind was calm and the chase crew had not yet arrived. When the chase crew did arrive, "the wind seemed to change direction to the southeast," then the wind speed "increased dramatically. . .from the northwest at approximately 10 to 15 knots." The pilot ordered the chase crew, which had been holding on to the basket, to release their hold and stand clear. The balloon ascended about 15 to 20 feet. The pilot said the "throat collapsed and [he] could not burn to compensate for false lift." He attempted to vent the envelope, but the top would not open because it was cold from standing on the ground. The pilot said the false lift dissipated and the balloon struck the ground, dragging across the field at 10 to 15 knots. The envelope eventually collapsed. One passenger jumped out of the basket; the other remained inside with the pilot. Examination of the balloon system by an FAA inspector revealed extensive damage to the woven basket frame where it joins the floor. Additionally, one of four support braces was broken. Winds at Albuquerque International Airport, located about 21 miles north of the accident site, were from 320 degrees at 24 knots, with gusts to 30 knots. The pilot received his private pilot certificate, limited to hot air balloons with an airborne heater, on December 1, 1999. All of his flight time had been in the Adams A55S. He reported the following: total time, 45:20 hours; pilot-in-command, 32:10 hours; last 90 days, 15:45 hours; last 30 days, 5:50 hours.

Flight

Event TypeAccident
Event Time09:50 MST
Nearest Airport0nm
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftAdams A55S
Tail NumberN4035T
Aircraft CategoryBall
DamageSubstantial
Operating RulePart 91
Engine TypeUnknown
Engine DetailsUnknown
Seats0

People & Injuries

Injury Summary3 injuries (3 minor injuries)
Fatal0
Serious0
Minor3
Uninjured0
Total3
Crew 1Age 47 · None

Conditions

ConditionsVMC
LightDaylight
Wind320° @ 24 kt, gusting 30 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point45 C / 7 C
Altimeter30.00 inHg
Observation Time15:56
Weather SourceWFAC

Appendix: Source Data