The U.S. aircraft register, updated daily
Parts

Filter Maintenance

No failure report names the filter maintenance. 4 FAA approvals let 1 company make a replacement filter maintenance, Cascade Aircraft Conversions LLC holding the most (4).

Approved replacement parts 4 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a filter maintenance and sell it as an approved part for the models named. These are the companies holding such approvals for a filter maintenance:

For these models most: Thrush Aircraft Llc S2 (2), Ayres Corporation S-2 (2), Thrush Aircraft Inc S-2 (1), Air Tractor Inc AT-402 (1), Air Tractor Inc AT-401 (1), Air Tractor Inc AT-400 (1).

MakerPartReplacesFitsGrantedStatus
Cascade Aircraft Conversions LLCFilter Maintenance 90389038Thrush Aircraft S2R-T34, S2R-T15, S2R-T112006-06-29current
Cascade Aircraft Conversions LLCFilter Maintenance 90389038Thrush Aircraft S-2R, S-2R-R3S, -R13402006-06-27current
Cascade Aircraft Conversions LLCFilter maintenance 90389038Air Tractor AT-400, -400A, AT-4022006-06-27current
Cascade Aircraft Conversions LLCFilter Maintenance 9038Modification PartAir Tractor AT-300, -301, -3022006-06-19current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.