Airworthiness Directive · Amendment 39-15861 · Hawker Beechcraft Corporation Model MU-300-10 Airplanes and Model 400 and 400A Series Airplanes; and Raytheon (Mitsubishi) Model MU-300 Airplanes
Hawker Beechcraft Corporation Model MU-300-10 Airplanes and Model 400 and 400A Series Airplanes; and Raytheon (Mitsubishi) Model MU-300 Airplanes
This AD applies to the airplanes specified in Table 1 of this AD, certificated in any category.
| Manufacturer | Model | Serial Nos. |
|---|---|---|
| Hawker Beechcraft Corporation | Model 400 series airplanes | RJ-1 through RJ-65 inclusive. |
| Hawker Beechcraft Corporation | Model 400A series airplanes | RK-1 through RK-93 inclusive. |
| Hawker Beechcraft Corporation | Model MU-300-10 airplanes | A1001SA through A1011SA inclusive. |
| Raytheon (Mitsubishi) | Model MU-300 airplanes | A003SA through A091SA inclusive. |
The FAA is superseding an existing airworthiness directive (AD), which applies to certain BEECH Model 400, 400A, and MU-300-10 airplanes. That AD currently requires installation of an improved adjustment mechanism on the flightcrew seats and replacement of the existing aluminum seat reinforcement assemblies with steel assemblies. This new AD would add airplanes to the applicability of the existing AD. This AD results from reports of incomplete latching of the existing adjustment mechanism and cracked reinforcement assemblies, which could result in sudden shifting of a flightcrew seat. We are issuing this AD to prevent sudden shifting of a flightcrew seat, which could impair the flightcrew's ability to control the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
For Hawker Beechcraft Model MU-300-10 airplanes and Model 400 and 400A series airplanes: Within 200 hours time-in-service after March 13, 1996 (the effective date of AD 96-03-07), install an improved adjustment mechanism on the flightcrew seat, and replace the existing aluminum seat reinforcement assemblies with steel assemblies, in accordance with Beechcraft Service Bulletin No. 2536, Revision 1, dated April 1995; or Raytheon Mandatory Service Bulletin SB 25-2536, Revision 2, dated March 2002.
For Raytheon (Mitsubishi) Model MU-300 airplanes: Within 200 flight hours or 12 months after the effective date of this AD, whichever occurs first, install an improved adjustment mechanism on the flightcrew seats, and replace the existing aluminum seat reinforcement assemblies with steel assemblies, in accordance with Raytheon Mandatory Service Bulletin SB 25-2536, Revision 2, dated March 2002.
(h) A note in the Accomplishment Instructions of Raytheon Mandatory Service Bulletin SB 25-2536, Revision 2, dated March 2002, instructs operators to contact Raytheon if any difficulty is encountered while accomplishing the actions specified in that service bulletin. However, any deviation from the instructions provided in Raytheon Mandatory Service Bulletin SB 25-2536, Revision 2, dated March 2002, must be approved as an alternative method of compliance (AMOC) under provisions of paragraph (i) of this AD.
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.
