The U.S. aircraft register, updated daily
Parts

Ltn Or

No failure report names the ltn or. 1 FAA approvals let 1 company make a replacement ltn or, Northrop Grumman Guidance and Electronics CO INC 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 ltn or and sell it as an approved part for the models named. These are the companies holding such approvals for a ltn or:

MakerPartReplacesFitsGrantedStatus
Northrop Grumman Guidance and Electronics CO INCLTN 51 or LTN 72 Dual Inertial Navigation System All parts noted on Top...Modification PartLockheed L382G2008-02-21current

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.