Airworthiness Directive · Amendment 39-14000 · Dornier Model 328-300 Series Airplanes
Dornier Model 328-300 Series Airplanes
This AD applies to Dornier Model 328-300 series airplanes; certificated in any category; equipped with a Dunlop brake unit having part number AHA2227-3 or -4.
The FAA is adopting a new airworthiness directive (AD) for certain Dornier Model 328-300 series airplanes. This AD requires performing repetitive inspections for discrepancies of the heat pack rotor assembly and rotor drive clips of the brake unit of the main landing gear (MLG), and replacing the assembly if any discrepancy is found. This AD is prompted by reports of cracking and breakage of the heat pack rotor assemblies. We are issuing this AD to find and fix discrepancies of the heat pack rotor assembly of the brake unit of the MLG and consequent loss of braking capability, which could result in the airplane overrunning the runway during take-off or landing.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
At the next brake installation or within 24 months after the effective date of this AD, which is first: Accomplish a detailed inspection for discrepancies of the heat pack rotor assembly and rotor drive clips of the brake unit of the MLG by doing all the actions specified in the Accomplishment Instructions of Dornier Service Bulletin SB-328J-32-169, dated November 20, 2002. If any discrepancy is found, before further flight, replace the heat pack rotor assembly with a new assembly in accordance with the service bulletin. Repeat the inspection thereafter in intervals not to exceed the next brake installation or 24 months, whichever is first.
Note 1: Dorner Service Bulletin SB-328J-32-169 refers to Dunlap Aviation Service Bulletin AHA2227-32-1292, Revision 1, dated July 19, 2002, as an additional source of service information.
Note 2: For the purpose of this AD, a detailed inspection is: “An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate procedures may be required.”
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.
