# NTSB DEN00LA062: Adams A55S, N4035T, Los Lunas, NM, March 18, 2000 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: March 18, 2000, 09:50 local (16:50 UTC) - Place: Los Lunas, NM - Coordinates: 34.809936, -106.729766 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=34.8099&lon=-106.7298&mi=10 - Phase of flight: [Standing](https://openairdocs.org/ntsb-phases/150) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 3 minor - Status: Completed, report December 4, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 48853 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN00LA062 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/48853/pdf - Page: https://openairdocs.org/ntsb/DEN00LA062 ## Probable cause The pilot's decision not to deflate the envelope. A factor was the wind gust. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - On ground/water encounter with weather, standing - blimp/airship,envelope/hull - not dumped (cause) - weather condition - gusts (contributing factor) ## Analysis 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 2to 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. ## Factual 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. ## Aircraft - Registration: [N4035T](https://openairdocs.org/aircraft/N4035T), registered now, S/N 139, built 1984 (OpenAirDocs) - Reported make and model: Adams A55S - Registry model: [Adams Balloon A55S](https://openairdocs.org/model/adams-balloon-a55s) (registry code 0050105) (OpenAirDocs) - Registry engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000, none) (OpenAirDocs) - Category: Balloon - Serial number: 139 - Airframe hours: 593 - Engines: unknown - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Marlin W. Milner - Airworthiness certificate: Standard, Normal - Last inspection: Annual, June 18, 1999, 35 hours before - Departed: NONE ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 47; private; flight hours: 45 total, 40 in this make and model, 32 as pilot in command, 16 in the last 90 days, 6 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 320° at 24 knots, gusting 30 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 45 °F, dew point 7 °F - Altimeter: 30.00 inHg - Observed at: ABQ, 25 nm away ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20000318004069A](https://openairdocs.org/incident/20000318004069A), Mar 18, 2000: Adams A55S, Los Lunas, NM, Substantial damage. (.4)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… From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.