Airworthiness Directive · Amendment 39-17595 · Equipment/furnishings
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-300, 747-400, 747-400D, and 747SP series airplanes; certificated in any category; as identified in Boeing Special Attention Service Bulletin 747-25-3428, Revision 4, dated February 25, 2013; except for Groups 3-4, Configuration 2, and Group 9, Configuration 2, airplanes.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-300, 747-400, 747-400D, and 747SP series airplanes. This AD was prompted by reports of worn or incorrectly assembled latches on main deck escape slides installed on airplane doors. This AD requires determining if the latches are correctly assembled; and doing corrective actions if necessary. This AD also requires, for certain airplanes, modifications to the escape slide/rafts and escape slides. We are issuing this AD to prevent a latch hook moving from closed to open in an escape slide/raft or escape slide, which could result in the escape slide/raft or escape slide not deploying correctly in an emergency, or releasing/inflating into the passenger cabin and causing injury to passengers and crew.
Within 48 months after the effective date of this AD: Determine if the latches in the main deck escape slide/rafts and the escape slides installed on the airplane doors are correctly assembled, and do all applicable corrective actions, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 747-25-3428, Revision 4, dated February 25, 2013. Do all applicable corrective actions before further flight. Options provided in Boeing Special Attention Service Bulletin 747-25-3428, Revision 4, dated February 25, 2013, for determining the correct assembly of the latches are acceptable for the corresponding requirement of this paragraph.
Note 1 to paragraph (g) of this AD: Boeing Special Attention Service Bulletin 747-25-3428, Revision 4, dated February 25, 2013, refers to Goodrich Service Bulletin 25-367, Revision 1, dated May 1, 2012, as an additional source of guidance for unpacking the escape slide/raft assemblies.
For Groups 1, 5, 10, and 13 airplanes, as identified in Boeing Special Attention Service Bulletin 747-25-3428, Revision 4, dated February 25, 2013: Prior to or concurrently with accomplishing the actions required by paragraph (g) of this AD, replace the packboard cap nuts with flush-type inserts, reinforce the lower packboard support bracket attachments, install hooks, modify the lower liner of the main entry door and packboard, and remove the “Press to Test” circuit panel and associated circuitry, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 747-25-2425, Revision 1, dated September 7, 1979.
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
