Parts

Bs

No failure report names the bs. 3 FAA approvals let 1 company make a replacement bs, Aviall 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 bs and sell it as an approved part for the models named. These are the companies holding such approvals for a bs:

Aviall 3

For these models most: Cessna 441 Conquest II (2).

Maker	Part	Replaces	Fits	Granted	Status
Aviall	BS2111 Thermostat assembly	Saft 4076	Cessna 441	2001-03-20	current
Aviall	BS2112 Thermostat assembly	Saft 4076	Cessna 441	2001-03-20	current
Aviall	BS2033 Temp. Sensor assembly	BS2033	Miscellaneous MA5-20, TMA5-20, SP400 4071	2001-03-20	current

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.