Airworthiness Directive · Amendment 39-19526 · Wings
The Boeing Company Airplanes
This AD applies to all The Boeing Company Model 727, 727-100, 727-100C, 727-200, 727-200F, and 727C series airplanes, certificated in any category.
We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 727 airplanes. This AD was prompted by a report of cracking in the inboard lower flange and adjacent web near the forward attachment of the outboard flap track at a certain position on a Model 737-300 airplane. The flap tracks of Model 737-300 airplanes are similar to the flap tracks of Model 727 airplanes. This AD requires repetitive detailed inspections and surface high frequency eddy current (HFEC) inspections of each outboard flap track at certain positions for any crack and discrepancy, and applicable on-condition actions. We are issuing this AD to address the unsafe condition on these products.
Except as required by paragraph (h) of this AD: At the applicable times specified in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 727-57A0188 RB, dated May 31, 2018, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 727-57A0188 RB, dated May 31, 2018.
Note 1 to paragraph (g) of this AD: Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 727-57A0188, dated May 31, 2018, which is referred to in Boeing Alert Requirements Bulletin 727-57A0188 RB, dated May 31, 2018.
(1) For purposes of determining compliance with the requirements of this AD: Where Boeing Alert Requirements Bulletin 727-57A0188 RB, dated May 31, 2018, uses the phrase “the original issue date of Requirements Bulletin 727-57A0188 RB,” this AD requires using “the effective date of this AD.”
(2) Where Boeing Alert Requirements Bulletin 727-57A0188 RB, dated May 31, 2018, specifies contacting Boeing for repair instructions, this AD requires repair before further flight using a method approved in accordance with the procedures specified in paragraph (j) of this AD.
As of the effective date of this AD, no person may install, on any airplane, a wing outboard flap track having a part number listed in paragraph 1.B. of Boeing Alert Requirements Bulletin 727-57A0188 RB, dated May 31, 2018, unless the inspections and applicable on-condition actions specified in the Accomplishment Instructions of Boeing Alert Requirements Bulletin 727-57A0188 RB, dated May 31, 2018, are accomplished concurrently with the installation of the part on the airplane.
