FAA 2023-26-02

Requires revising the airplane flight manual to include procedures to prevent takeoff with an active bleed air leak annunciated while on the ground. 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 from the supplier 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.