The U.S. aircraft register, updated daily
Parts

Secondary Heat

No failure report names the secondary heat. 10 FAA approvals let 5 companies make a replacement secondary heat, Honeywell International INC. holding the most (4).

Approved replacement parts 10 parts manufacturer approvals

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

For these models most: Mcdonnell Douglas DC-9 (3), Douglas DC-9 (3), Gulfstream G-1159 Gulfstream II and III (2), Gulfstream American Corp G-1159 (2), Mcdonnell Douglas Aircraft Co MD-88 (1), Gulfstream GVI G650 (1).

MakerPartReplacesFitsGrantedStatus
Honeywell International INC.Secondary Heat Exchangers L184060184060-3-2Boeing DC-9-11, DC-9-12, DC-9-132023-02-23current
Honeywell International US LLCSecondary Heat Exchangers L184060184060-3-2Boeing DC-9-11, DC-9-12, DC-9-132023-02-21current
Honeywell International INC.Secondary Heat Exchanger 183820-1-1183820-1-1Gulfstream Aerospace... G-1159, G-1159A2022-12-16current
Honeywell International INC.Secondary Heat Exchanger 183820-1-2183820-1-2Gulfstream Aerospace... G-1159, G-1159A2022-12-16current
Honeywell International INC.Secondary Heat Exchanger 2341682-12341682-1Gulfstream Aerospace... GVI2022-12-13current
Honeywell International INC. Honeywell AerospaceSecondary Heat Exchanger L8602344-1184060-3-2Boeing DC-9-11 DC-9-12 DC-9-13 DC-9-14...2020-07-26current
Honeywell International INCSecondary Heat Exchanger 2341682-12341682-1Gulfstream G6502012-10-08current
Honeywell International INCSecondary Heat Exchanger 183820-1-2183820-1-2Gulfstream G-1159 (GII), G-1159A (GIII)2007-01-04current
Honeywell International INCSecondary Heat Exchanger 183820-1-1183820-1-1Gulfstream G-1159 (GII), G-1159A (GIII)2007-01-04current
Lori INCSecondary Heat Exchanger L8602344-1AiResearch Manufacturing P/N: 184060-3-2McDonnell Douglas DC-9-11, DC-9-12, DC-9-131996-11-21current

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.