The U.S. aircraft register, updated daily
Parts

Hat Shelf

No failure report names the hat shelf. 4 FAA approvals let 3 companies make a replacement hat shelf, Plane Parts Company holding the most (2).

Approved replacement parts 4 parts manufacturer approvals

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

For these models most: Piper PA-28 Cherokee, Warrior, Archer and Arrow (2), Tiger Aircraft Llc AG-5 (1), Rockwell International 112 (1), Piper PA-44 Seminole (1), Piper PA-34 Seneca (1), Piper PA-32 Cherokee Six, Lance and Saratoga (1).

MakerPartReplacesFitsGrantedStatus
Plane Plastics LTDHat Shelf K49017-4349017-43Commander 112, 112B, 112TC2011-02-03current
Plane Parts CompanyHat Shelf Duct Section 01-099310-1076305-00, 76308-00Piper PA-28-180, PA-28-181, PA-28-2352003-02-10current
Plane Parts CompanyHat Shelf Duct Section 01-028310-1079189-00Piper PA-28-1402003-02-10current
Oxford Design Group INCHat Shelf OX5102353-705102353-70Tiger Aircraft AA-5, -5A, -5B1993-04-15current

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.