FAA 2024-03-08

Requires maintenance records verification, and if an affected part is installed, would prohibit the use of certain master minimum equipment list (MMEL) items under certain conditions by requiring revising the operator's existing minimum equipment list (MEL). It also requires testing the overheat detection sensing elements, marking each serviceable sensing element with a witness mark, and replacing each non-serviceable part with a serviceable part. Prompted by reports that some overheat detection sensing elements of the bleed air leak detection system were manufactured with insufficient salt fill, which can result in an inability to detect hot bleed air leaks.