Airworthiness Directive · Amendment 39-13933 · Boeing Model 747-100, -200B, -200F, -200C, -100B, -300, -100B SUD, -400, -400D, -400F, and 747SR Series Airplanes
Boeing Model 747-100, -200B, -200F, -200C, -100B, -300, -100B SUD, -400, -400D, -400F, and 747SR Series Airplanes
Superseded. A later AD replaced this one: AD 2016-01-04. Comply with the one in force.
This AD applies to Boeing Model 747-100, -200B, -200F, -200C, -100B, -300, -100B SUD, -400, -400D, -400F, and 747SR series airplanes; line numbers 1 through 1333 inclusive; certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747 series airplanes. This AD requires a one-time inspection for discrepancies of the frame web and inner chords on the forward edge frame of the number 5 main entry door cutout, and related corrective action. This AD is prompted by a report of cracking of the frame web and inner chords on the forward edge frame of the number 5 main entry door. We are issuing this AD to find and fix discrepancies of the frame web and inner chords, which could result in cracking, subsequent severing of the frame, and consequent rapid depressurization of 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 airplanes on which the repetitive inspections required by AD 2001-16-02 have not been accomplished as of the effective date of this AD: Do a one-time detailed inspection for discrepancies (nicks, scratches, and/or gouges) of the frame web and inner cords (forward and aft) of the forward edge frame of the number 5 main entry door cutout, by doing all the applicable actions specified in the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2494, dated September 18, 2003. Do the inspection at the latest of the times specified in paragraphs (f)(1), (f)(2), and (f)(3) of this AD.
(1) Before the accumulation of 10,000 total flight cycles.
(2) Within 1,500 flight cycles after the effective date of this AD.
(3) Within 24 months after the effective date of this AD.
(g) For airplanes on which the repetitive inspections required by AD 2001-16-02 have been accomplished as of the effective date of this AD: No further action is required by this AD.
Note 1: For the purposes of this AD, a detailed inspection is: “An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at intensity deemed appropriate by the inspector. Inspection aids such as mirror, magnifying lenses, etc., may be used. Surface cleaning and elaborate access procedures may be required.”
If any discrepancy is found during the inspection required by paragraph (f) of this AD: Before further flight, do all the related corrective actions specified in the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2494, dated September 18, 2003. Where the service bulletin specifies contacting the manufacturer for disposition of certain repair conditions, repair before further flight per a method approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA; or per data meeting the type certification basis of the airplane approved by a Boeing Company Designated Engineering Representative who has been authorized by the Manager, Seattle ACO, to make such findings. For a repair method to be approved, the approval must specifically refer to this AD.
