The U.S. aircraft register, updated daily
Parts

Tm Marker

No failure report names the tm marker. 2 FAA approvals let 1 company make a replacement tm marker, Freeflight Systems, Limited Partnership holding the most (2).

Approved replacement parts 2 parts manufacturer approvals

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

For these models most: Cessna 182 Skylane (2).

MakerPartReplacesFitsGrantedStatus
Freeflight Systems, Limited PartnershipTM 23 Marker Beacon 1901-0231-00Modification PartCessna 182Q2006-05-10current
Freeflight Systems, Limited PartnershipTM 23 Marker Beacon 1901-0231-00Modification PartCessna 182Q2002-02-03current

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.