Airworthiness Directive · Amendment 39-17342 · Electrical power system wiring
Hawker Beechcraft Corporation (Type Certificate Previously Held by Raytheon Aircraft Company; Beech Aircraft Corporation) Airplanes
This AD applies to the airplanes identified in paragraphs (c)(1) and (c)(2) of this AD, certificated in any category.
(1) Hawker Beechcraft Corporation (Type Certificate previously held by Raytheon Aircraft Company; Beech Aircraft Corporation) Model 400A airplanes having serial numbers RK-45 and RK-49 through RK-353 inclusive.
(2) Hawker Beechcraft Corporation (Type Certificate previously held by Raytheon Aircraft Company; Beech Aircraft Corporation) Model 400A airplanes (marketed as Hawker 400XP airplanes) having serial numbers RK-354 through RK-594 inclusive.
We are adopting a new airworthiness directive (AD) for certain Hawker Beechcraft Corporation (Type Certificate previously held by Raytheon Aircraft Company; Beech Aircraft Corporation) Model 400A airplanes. This AD was prompted by a report that the wiring for the 5- volt direct current (DC) system is undersized and does not have adequate circuit protection for the smaller gauge wire. This AD requires installing an in-line fuse in the 5-volt DC system for each of the five instrument lighting control power supplies. We are issuing this AD to prevent failure of the wiring, which could result in smoke in the cockpit, loss of cockpit lighting, and potential damage to surrounding wiring for other cockpit equipment such as the stick shaker function or angle-of-attack indicators.
Within 400 flight hours or 12 months after the effective date of this AD, whichever occurs first, install an in-line fuse assembly in the 5-volt DC output circuit on each of the five instrument lighting power supplies, in accordance with the Accomplishment Instructions of Hawker Beechcraft Mandatory Service Bulletin SB 33-4002, dated October 2010. A note in the Accomplishment Instructions of Hawker Beechcraft Mandatory Service Bulletin SB 33-4002, dated October 2010, instructs operators to contact Hawker Beechcraft if any difficulty is encountered in accomplishing that service bulletin. However, any deviation from the instructions provided in Hawker Beechcraft Mandatory Service Bulletin SB 33-4002, dated October 2010, must be approved as an alternative method of compliance (AMOC) under the 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.
Aircraft
