The U.S. aircraft register, updated daily
Parts

Elt Antenna

No failure report names the elt antenna. 2 FAA approvals let 2 companies make a replacement elt antenna, Honeywell International US LLC holding the most (1).

Approved replacement parts 2 parts manufacturer approvals

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

For these models most: Boeing 787 Dreamliner (1), Bell 505 (1).

MakerPartReplacesFitsGrantedStatus
Bell Helicopter Textron INCELT Antenna Mount 505-013-122505-013-122Bell Helicopter... 5052017-11-05current
Honeywell International US LLCELT Antenna Gasket 1153468-11153468-1Boeing 787-82011-09-07current

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.