The U.S. aircraft register, updated daily
Parts

Idg Surface

No failure report names the idg surface. 1 FAA approvals let 1 company make a replacement idg surface, Hamilton Sundstrand 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 idg surface and sell it as an approved part for the models named. These are the companies holding such approvals for a idg surface:

MakerPartReplacesFitsGrantedStatus
Hamilton SundstrandIDG SURFACE COOLER - LARGE (MRJ) 10264335324191Pratt & Whitney PW1217G2020-03-10current

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.