Search and recovery of aircraft parts in ice-sheet crevasse fields using airborne and in situ geophysical sensors
International audience On 30 September 2017, an Air France Airbus A380-800 suffered a failure of its fourth engine while over Greenland. This failure resulted in the loss of the engine fan hub, fan blades and surrounding structure. An initial search recovered 30 pieces of light debris, but the prima...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , , , , , , , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2020
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-03180141 https://hal.archives-ouvertes.fr/hal-03180141/document https://hal.archives-ouvertes.fr/hal-03180141/file/DEMR21017.pdf https://doi.org/10.1017/jog.2020.26 |
id |
ftccsdartic:oai:HAL:hal-03180141v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-03180141v1 2023-05-15T16:21:31+02:00 Search and recovery of aircraft parts in ice-sheet crevasse fields using airborne and in situ geophysical sensors Mankoff, Kenneth, van As, Dirk Lines, Austin Bording, Thue Elliott, Joshua Kraghede, Rune Cantalloube, Hubert Oriot, Hélène Dubois-Fernandez, Pascale Ruault Du Plessis, Olivier Christiansen, Anders Vest Auken, Esben Hansen, Karina Colgan, William Karlsson, Nanna Department of Glaciology and Climate Geological Survey of Denmark and Greenland (GEUS) Thayer School of Engineering at Dartmouth College, Hanover, USA HydroGeophysics Group, department of Geoscience, Aarhus university, Denmark DEMR, ONERA, Université Paris Saclay Palaiseau ONERA-Université Paris-Saclay DEMR, ONERA Salon ONERA 2020-06 https://hal.archives-ouvertes.fr/hal-03180141 https://hal.archives-ouvertes.fr/hal-03180141/document https://hal.archives-ouvertes.fr/hal-03180141/file/DEMR21017.pdf https://doi.org/10.1017/jog.2020.26 en eng HAL CCSD International Glaciological Society info:eu-repo/semantics/altIdentifier/doi/10.1017/jog.2020.26 hal-03180141 https://hal.archives-ouvertes.fr/hal-03180141 https://hal.archives-ouvertes.fr/hal-03180141/document https://hal.archives-ouvertes.fr/hal-03180141/file/DEMR21017.pdf doi:10.1017/jog.2020.26 info:eu-repo/semantics/OpenAccess ISSN: 0022-1430 Journal of Glaciology https://hal.archives-ouvertes.fr/hal-03180141 Journal of Glaciology, International Glaciological Society, 2020, 66 (257), pp.496-508. ⟨10.1017/jog.2020.26⟩ Applied glaciology crevasses glacier hazards glaciological instruments and methods [SPI]Engineering Sciences [physics] [PHYS]Physics [physics] info:eu-repo/semantics/article Journal articles 2020 ftccsdartic https://doi.org/10.1017/jog.2020.26 2021-12-19T00:21:34Z International audience On 30 September 2017, an Air France Airbus A380-800 suffered a failure of its fourth engine while over Greenland. This failure resulted in the loss of the engine fan hub, fan blades and surrounding structure. An initial search recovered 30 pieces of light debris, but the primary part of interest, a ~220 kg titanium fan hub, was not recovered because it had a different fall trajectory than the light debris, impacted into the ice-sheet's snow surface, and was quickly covered by drifting snow. Here we describe the methods used for the detection of the fan hub and details of the field campaigns. The search area included two crevasse fields of at least 50 snow-covered crevasses 1 to ~30 m wide with similar snow bridge thicknesses. After 21 months and six campaigns, using airborne synthetic aperture radar, ground-penetrating radar, transient electromagnetics and an autonomous vehicle to survey the crevasse fields, the fan hub was found within ~1 m of a crevasse at a depth of ~3.3 to 4 m and was excavated with shovels, chain saws, an electric winch, sleds and a gasoline heater, by workers using fall-arrest systems. Article in Journal/Newspaper glacier Greenland Ice Sheet Journal of Glaciology Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Greenland Journal of Glaciology 66 257 496 508 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Applied glaciology crevasses glacier hazards glaciological instruments and methods [SPI]Engineering Sciences [physics] [PHYS]Physics [physics] |
spellingShingle |
Applied glaciology crevasses glacier hazards glaciological instruments and methods [SPI]Engineering Sciences [physics] [PHYS]Physics [physics] Mankoff, Kenneth, van As, Dirk Lines, Austin Bording, Thue Elliott, Joshua Kraghede, Rune Cantalloube, Hubert Oriot, Hélène Dubois-Fernandez, Pascale Ruault Du Plessis, Olivier Christiansen, Anders Vest Auken, Esben Hansen, Karina Colgan, William Karlsson, Nanna Search and recovery of aircraft parts in ice-sheet crevasse fields using airborne and in situ geophysical sensors |
topic_facet |
Applied glaciology crevasses glacier hazards glaciological instruments and methods [SPI]Engineering Sciences [physics] [PHYS]Physics [physics] |
description |
International audience On 30 September 2017, an Air France Airbus A380-800 suffered a failure of its fourth engine while over Greenland. This failure resulted in the loss of the engine fan hub, fan blades and surrounding structure. An initial search recovered 30 pieces of light debris, but the primary part of interest, a ~220 kg titanium fan hub, was not recovered because it had a different fall trajectory than the light debris, impacted into the ice-sheet's snow surface, and was quickly covered by drifting snow. Here we describe the methods used for the detection of the fan hub and details of the field campaigns. The search area included two crevasse fields of at least 50 snow-covered crevasses 1 to ~30 m wide with similar snow bridge thicknesses. After 21 months and six campaigns, using airborne synthetic aperture radar, ground-penetrating radar, transient electromagnetics and an autonomous vehicle to survey the crevasse fields, the fan hub was found within ~1 m of a crevasse at a depth of ~3.3 to 4 m and was excavated with shovels, chain saws, an electric winch, sleds and a gasoline heater, by workers using fall-arrest systems. |
author2 |
Department of Glaciology and Climate Geological Survey of Denmark and Greenland (GEUS) Thayer School of Engineering at Dartmouth College, Hanover, USA HydroGeophysics Group, department of Geoscience, Aarhus university, Denmark DEMR, ONERA, Université Paris Saclay Palaiseau ONERA-Université Paris-Saclay DEMR, ONERA Salon ONERA |
format |
Article in Journal/Newspaper |
author |
Mankoff, Kenneth, van As, Dirk Lines, Austin Bording, Thue Elliott, Joshua Kraghede, Rune Cantalloube, Hubert Oriot, Hélène Dubois-Fernandez, Pascale Ruault Du Plessis, Olivier Christiansen, Anders Vest Auken, Esben Hansen, Karina Colgan, William Karlsson, Nanna |
author_facet |
Mankoff, Kenneth, van As, Dirk Lines, Austin Bording, Thue Elliott, Joshua Kraghede, Rune Cantalloube, Hubert Oriot, Hélène Dubois-Fernandez, Pascale Ruault Du Plessis, Olivier Christiansen, Anders Vest Auken, Esben Hansen, Karina Colgan, William Karlsson, Nanna |
author_sort |
Mankoff, Kenneth, |
title |
Search and recovery of aircraft parts in ice-sheet crevasse fields using airborne and in situ geophysical sensors |
title_short |
Search and recovery of aircraft parts in ice-sheet crevasse fields using airborne and in situ geophysical sensors |
title_full |
Search and recovery of aircraft parts in ice-sheet crevasse fields using airborne and in situ geophysical sensors |
title_fullStr |
Search and recovery of aircraft parts in ice-sheet crevasse fields using airborne and in situ geophysical sensors |
title_full_unstemmed |
Search and recovery of aircraft parts in ice-sheet crevasse fields using airborne and in situ geophysical sensors |
title_sort |
search and recovery of aircraft parts in ice-sheet crevasse fields using airborne and in situ geophysical sensors |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-03180141 https://hal.archives-ouvertes.fr/hal-03180141/document https://hal.archives-ouvertes.fr/hal-03180141/file/DEMR21017.pdf https://doi.org/10.1017/jog.2020.26 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet Journal of Glaciology |
genre_facet |
glacier Greenland Ice Sheet Journal of Glaciology |
op_source |
ISSN: 0022-1430 Journal of Glaciology https://hal.archives-ouvertes.fr/hal-03180141 Journal of Glaciology, International Glaciological Society, 2020, 66 (257), pp.496-508. ⟨10.1017/jog.2020.26⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1017/jog.2020.26 hal-03180141 https://hal.archives-ouvertes.fr/hal-03180141 https://hal.archives-ouvertes.fr/hal-03180141/document https://hal.archives-ouvertes.fr/hal-03180141/file/DEMR21017.pdf doi:10.1017/jog.2020.26 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1017/jog.2020.26 |
container_title |
Journal of Glaciology |
container_volume |
66 |
container_issue |
257 |
container_start_page |
496 |
op_container_end_page |
508 |
_version_ |
1766009518668382208 |