Airworthiness Directive · Amendment 39-10408 · Raytheon (Beech) Model 400, 400A, 400T, MU-300, and MU-300-10 Airplanes
Raytheon (Beech) Model 400, 400A, 400T, MU-300, and MU-300-10 Airplanes
The following models and series of airplanes, certificated in any category, equipped with AlliedSignal outflow/ safety valves, as identified in AlliedSignal Aerospace Service Bulletin 103570-21-4012, Revision 1, dated May 30, 1995: Model of airplane Serial Nos. 400................................... RJ-1 through RJ-65 inclusive. 400A.................................. RK-1 through RK-42 inclusive. 400T (military)....................... TT-4 and TT-19. MU-300................................ S/N A001SA through A091SA inclusive. MU-300-10............................. A1001SA through A1011SA inclusive.
This amendment supersedes an existing airworthiness directive (AD), applicable to certain Raytheon (Beech) Model 400, 400A, 400T, MU- 300, MU-300-10 airplanes, that currently requires replacement of outflow/safety valves with serviceable valves. This amendment revises the applicability of the existing AD to add an airplane model and to remove other airplanes, as well as to identify the serial numbers of affected airplanes. The actions specified by this AD are intended to prevent cracking and consequent failure of the outflow/safety valves, which could result in rapid decompression of the airplane.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
