The U.S. aircraft register, updated daily
Parts

Underwater Locator

No failure report names the underwater locator. 3 FAA approvals let 1 company make a replacement underwater locator, Dukane Corporation holding the most (3).

Approved replacement parts 3 parts manufacturer approvals

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

For these models most: Mcdonnell Douglas DC-10 (1).

MakerPartReplacesFitsGrantedStatus
Dukane CorporationUnderwater Locator Beacon Model N15F210B and...-Boeing 4A21/4A26/707 Series, A3WE/727...1975-08-17current
Dukane CorporationUnderwater Locator Beacon, Mounting Kit N30A20A DuKane Model N15F210B-Lockheed TriStar Model L-1011-385-11975-05-19current
Dukane CorporationUnderwater Locator Beacon, Mounting Kit N30A20A DuKane Model N15F210B-McDonnell Douglas DC-10 Series 10, 30, 40) (DC-9 Series 111975-05-19current

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.