Airworthiness Directive · Amendment 39-13128 · Boeing Model 737-200, -200C, -300, -400, and -500 Series Airplanes
Boeing Model 737-200, -200C, -300, -400, and -500 Series Airplanes
Superseded. A later AD replaced this one: AD 2013-09-01. Comply with the one in force.
Model 737-200, -200C, -300, -400, and -500 series airplanes, having line numbers 292 through 2552 inclusive, and on which the modification specified in Boeing Service Bulletin (SB) 737-53A1177, Revision 6, dated May 31, 2001, has not been accomplished; certificated in any category.
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Boeing Model 737-200, -200C, -300, -400, and - 500 series airplanes. This action requires a one-time mid-frequency eddy current (MFEC), a low-frequency eddy current (LFEC), and a detailed inspection for damage or cracking of stringer S-4L and S-4R lap joints and stringer clips between body station (BS) 540 and BS 727, and follow-on inspections and repair if necessary. This action is necessary to find and fix cracking of the fuselage lap joints, which could result in sudden decompression of the airplane.
