Airworthiness Directive · Amendment 39-14166 · Boeing Model 777-200 and -300 Series Airplanes
Boeing Model 777-200 and -300 Series Airplanes
This AD applies to Boeing Model 777-200 and -300 series airplanes, certificated in any category; as identified in Boeing Alert Service Bulletin 777-27A0060, dated September 18, 2003.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 777-200 and -300 series airplanes. This AD requires inspecting for the installation of the tie plate for the wire bundles routed from lower section 41 into the center control stand in the flight deck; inspecting for any wire chafing or damage and repair if necessary; and installing a tie plate if necessary. This AD is prompted by a report of missing tie plates for the wire bundles. We are issuing this AD to prevent wire chafing, which could result in the loss of flight control, communication, navigation, and engine fire control systems. Loss of these systems could consequently result in a significant reduction of safety margins, an increase in flight crew workload, and in the case where loss of engine fire control is combined with an engine fire, could result in an uncontrollable fire.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 18 months after the effective date of this AD, inspect for installation of the tie plate for the wire bundles routed from lower section 41 into the center control stand in the flight deck, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 777-27A0060, dated September 18, 2003.
(1) If the tie plate is found to be installed, no further action is required by this AD.
(2) If the tie plate is missing, before further flight, do a detailed inspection of the wire bundles for any chafing or damage and repair if necessary, and install a tie plate in accordance with the Accomplishment Instructions of the service bulletin.
Note 1: For the purposes 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.
Aircraft
