The U.S. aircraft register, updated daily
Parts

Inspection Plate

No failure report names the inspection plate. 5 FAA approvals let 3 companies make a replacement inspection plate, Mcfarlane Aviation INC holding the most (3).

Approved replacement parts 5 parts manufacturer approvals

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

For these models most: Cessna A152 (3), Cessna A150 (3), Cessna 172 Skyhawk (3), Cessna U206 Stationair (1), Cessna TU206 (1), Cessna T337 (1), Cessna T182 Turbo Skylane (1), Cessna P337 (1), Cessna 337 Skymaster (1), Cessna 182 Skylane (1).

MakerPartReplacesFitsGrantedStatus
W&S Consultants INC. DBA Telair InternationalINSPECTION PLATE S225-4F-WSS225-4FTextron Aviation Inc. 1522022-12-05current
Mcfarlane Aviation INCInspection Plate MCS225-1S225-1Textron Aviation Inc. 150, 150A, 150B2019-10-31current
Mcfarlane Aviation INCInspection Plate MCS329S329Textron Aviation Inc. 150, 150A, 150B2019-10-31current
Mcfarlane Aviation INCInspection Plate MCS225-2S225-2Textron Aviation Inc. 150H, 150J, 150K2019-10-31current
Aviation EnterprisesInspection Plate AE S225-8S225-8Cessna 337 series, T337 series, P337 series2002-05-05current

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.