The U.S. aircraft register, updated daily
Parts

Zee Systems

No failure report names the zee systems. 5 FAA approvals let 1 company make a replacement zee systems, Zee Systems INC holding the most (5).

Approved replacement parts 5 parts manufacturer approvals

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

For these models most: Dehavilland DHC-6 (3), Cessna S550 (1), Cessna 551 (1), Cessna 550 Citation II (1), Cessna 501 Citation I/SP (1), Cessna 500 Citation I (1).

MakerPartReplacesFitsGrantedStatus
Zee Systems INCZee Systems, Inc. Air Conditioner Detail Parts As listed on Dwg....Modification PartsCessna 500, 5012007-04-24current
Zee Systems INCZee Systems, Inc. Air Conditioner Detail Parts As listed on Dwg. MDL DL 80-16Modification PartsCessna 550, S550, 5512007-04-24current
Zee Systems INCZee Systems, Inc. Air Conditioner Installation DH-6 Twin... MA150-301Modification PartdeHavilland DHC-6-100, -200, -3002004-04-22current
Zee Systems INCZee Systems, Inc. Air Conditioner Installation DH-6 Twin... MA150-301Modification PartDeHavilland DHC-6-100, -200, -3002004-04-18current
Zee Systems INCZee Systems Air Conditioner Installation DH-6 Twin Otter Kit MA150-301Modification PartDeHavilland DHC-6-100, -200, -3001997-12-22current

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.