Par Wide

No failure report names the par wide. 4 FAA approvals let 1 company make a replacement par wide, Talon Aerospace holding the most (4).

Approved replacement parts 4 parts manufacturer approvals

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

Talon Aerospace 4

For these models most: Boeing 737 (4).

Maker	Part	Replaces	Fits	Granted	Status
Talon Aerospace	Par 20 WIDE BEAM TAE0428-2	Modification Part	Boeing 737-600 Series, 737-700 Series,...	2018-04-15	current
Talon Aerospace	Par 20 WIDE WARM TAE0428-2W	Modification Part	Boeing 737-600 Series, 737-700 Series,...	2018-04-15	current
Talon Aerospace	Par 20 WIDE WARM TAE0428-2W	Modification Part	Boeing 737-600 Series, 737-700 Series,...	2016-06-26	current
Talon Aerospace	Par 20 WIDE BEAM TAE0428-2	Modification Part	Boeing 737-600 Series, 737-700 Series,...	2016-06-26	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.