Parts

Top Plenum

No failure report names the top plenum. 1 FAA approvals let 1 company make a replacement top plenum, L-3 Communications Integrated Systems holding the most (1).

Approved replacement parts 1 parts manufacturer approvals

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

L-3 Communications Integrated Systems 1

For these models most: Air Tractor Inc AT-802 (1).

Maker	Part	Replaces	Fits	Granted	Status
L-3 Communications Integrated Systems	TOP-PLENUM L2120‐1	Modification Part	Air Tractor Inc. AT‐802	2024-01-25	current

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.