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Who holds what · as the FAA records the name

Nelson Filter

Named as the FAA publishes it on its approvals.

Holds 3 approved modifications, most of them for the Piper PA-30 Twin Comanche. FAA spelling: Nelson Filter.

Approved modifications 3 · newest first

Piper PA-30 Twin Comanche 1Piper PA-28 Cherokee, Warrior, Archer and Arrow 1Piper PA-24 Comanche 1Piper PA-23 Apache and Aztec 1Piper PA-19 1Piper PA-18 Super Cub 1Piper PA-16 Clipper 1Navion NAVION G 1Navion NAVION F 1Navion NAVION D 1Martin 404 1Hughes 269 300 series helicopters 1
1974-08-29SA584WE · Installation of oil filter assemblies. · 47J-2A, 47J, 47K
1974-08-29SA1744WE · Installation of oil filter assemblies. · C-46 Series, Army B-23, Army A-26B
1974-08-29SA630WE · Installation of oil filter assemblies. (NAVION A AND B with optional engine) · A-9A, H-250, H-295 (USAF U-10D)

Source: FAA Dynamic Regulatory System (type certificate data sheets, supplemental type certificates, parts manufacturer approvals, technical standard order authorisations). An organisation's name is as the FAA spelled it on each record; related spellings are separate pages.