The U.S. aircraft register, updated daily
Parts

Auto Heat

No failure report names the auto heat. 2 FAA approvals let 1 company make a replacement auto heat, Flight Enhancements, LLC holding the most (2).

Approved replacement parts 2 parts manufacturer approvals

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

For these models most: Maule MXT-7 (2), Maule MX-7 (2), Maule MT-7 (2), Maule M-7 (2), Maule M-6 (2), Maule M-5 (2), Maule M-4 (2).

MakerPartReplacesFitsGrantedStatus
Flight Enhancements, LLCAuto-Heat Thermocouple AH-010-001Modification ArticleMaule Aerospace... M-4, M-4C, M-4S2017-05-03current
Flight Enhancements, LLCAuto-Heat Module AH-001-001Modification ArticleMaule Aerospace... M-4, M-4C, M-4S2017-05-03current

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.