Airworthiness Directive · Amendment 39-17687 · Fuselage
The Boeing Company Airplanes
Superseded. A later AD replaced this one: AD 2015-02-26. Comply with the one in force.
This AD applies to the airplanes identified in paragraphs (c)(1) and (c)(2) of this AD, certificated in any category.
(1) The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes, as identified in Boeing Special Attention Service Bulletin 737-53-1260, Revision 1, dated May 23, 2013.
(2) The Boeing Company Model 737-600, -700, -700C, -800, and -900 series airplanes, as identified in Boeing Service Bulletin 737-53-1244, Revision 5, dated July 27, 2011.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-100, -200, -200C, -300, -400, -500, -600, -700, -700C, -800, and -900 series airplanes. This AD was prompted by a report that the seat track attachment of body station 520 flexible joint is structurally deficient in resisting a 9g forward emergency load condition in certain seating configurations. This AD requires replacing the pivot link assembly on certain seats, modifying the existing seat track link assembly fastener on certain seats, or replacing the seat track link assemblies on certain seats. Also, for certain airplanes, this AD requires installing a new seat track link assembly or modifying the seat track link assembly. For certain other airplanes, this AD requires inspecting, changing, or repairing the seat track link assembly. We are issuing this AD to prevent seat detachment in an emergency landing, which could cause injury to occupants of the passenger compartment and affect emergency egress.
Within 60 months after the effective date of this AD, do the actions specified in paragraph (g)(1), (g)(2), (g)(3), or (g)(4) of this AD, as applicable.
(1) For Model 737-600, -700, -700C, -800, and -900 series airplanes: Install new, improved pivot link assemblies, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 737-53-1244, Revision 5, dated July 27, 2011.
(2) For airplanes in Groups 1, 2, 3, and 4, as identified in Boeing Special Attention Service Bulletin 737-53-1260, Revision 1, dated May 23, 2013: Replace the seat track link assembly, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737-53-1260, Revision 1, dated May 23, 2013.
(3) For airplanes in Group 6, as identified in Boeing Special Attention Service Bulletin 737-53-1260, Revision 1, dated May 23, 2013: Inspect, change, or repair the seat track link assembly, as applicable, using a method approved in accordance with the procedures specified in paragraph (k) of this AD.
(4) For airplanes in Group 5, as identified in Boeing Special Attention Service Bulletin 737-53-1260, Revision 1, dated May 23, 2013: Modify the existing seat track link assembly fastener, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737-53-1260, Revision 1, dated May 23, 2013.
In lieu of the replacement specified in paragraph (g)(2) of this AD, doing the optional modification of the seat track link assembly, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737-53-1260, Revision 1, dated May 23, 2013, is acceptable for compliance with the requirements of paragraph (g)(2) of this AD, provided the modification is done within the compliance time specified in the introductory text of paragraph (g) of this AD.
For airplanes in Groups 1, 2, 4, and 5, as identified in Boeing Special Attention Service Bulletin 737-53-1260, Revision 1, dated May 23, 2013: Before or concurrently with the accomplishment of the actions specified in paragraph (g)(2) or (g)(3) of this AD, install a new seat track link assembly or modify the seat track link assembly, as applicable, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 737-53-1120, Revision 1, dated May 13, 1993.
