The U.S. aircraft register, updated daily
Parts

Automatic Flagman

No failure report names the automatic flagman. 3 FAA approvals let 1 company make a replacement automatic flagman, Automatic Flagman CO holding the most (3).

Approved replacement parts 3 parts manufacturer approvals

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

For these models most: Snow 600 (1), Ayres Corporation S-2 (1), American Champion Aircraft 8 Decathlon and Scout (1), American Champion Aircraft 7 Citabria and Champ (1), Air Tractor Inc AT-402 (1).

MakerPartReplacesFitsGrantedStatus
Automatic Flagman COAutomatic Flagman Dispensor System MDL 4Modification PartAir Tractor AT-402, -402A, -5031992-03-01current
Automatic Flagman COAutomatic Flagman MDL No. 4Modification PartAircraft Parts & Development A-9, A-9A, A-9B1990-07-11current
Automatic Flagman COAutomatic Flagman MDL No. 5AModification PartAmerican Champion 7GCBC, 8GCBC1990-07-11current

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.