The U.S. aircraft register, updated daily
Parts

Inboard Bulb

No failure report names the inboard bulb. 3 FAA approvals let 1 company make a replacement inboard bulb, Tanalian Aviation 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 inboard bulb and sell it as an approved part for the models named. These are the companies holding such approvals for a inboard bulb:

For these models most: Cessna A185 Skywagon (3), Cessna 182 Skylane (2), Cessna 185 Skywagon (1), Cessna 180 Skywagon (1).

MakerPartReplacesFitsGrantedStatus
Tanalian AviationInboard Bulb Angle TA-19Modification ArticleTextron Aviation... 180, 180A, 180B2026-06-16current
Tanalian AviationInboard Bulb Angle TA-20Modification ArticleTextron Aviation Inc. 180, 180A, 180B2023-07-11current
Tanalian AviationInboard Bulb Angle TA-19Modification PartCessna 180, 180A, 180B2008-12-29current

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.