Airworthiness Directive · Amendment 39-17671 · Trailing edge flaps
The Boeing Company Airplanes
This AD applies to all The Boeing Company Model 757-200, -200PF, -200CB, and -300 series airplanes, certificated in any category.
We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 757 airplanes. This AD was prompted by a report of a broken forward support fitting at the inboard track of the inboard flap. This AD requires repetitive inspections of the forward support fitting assemblies of the inboard track of the left and right inboard flaps for cracking, and corrective actions if necessary. We are issuing this AD to detect and correct cracking of the forward support fitting assembly, which could result in loss of inboard flap control and subsequent loss of airplane control.
Except as provided by paragraph (h) of this AD, at the applicable time specified in paragraph 1.E., “Compliance,” of Boeing Special Attention Service Bulletin 757-57-0071, dated September 12, 2012: Do a high frequency eddy current (HFEC) inspection for cracking in the forward support fitting assemblies of the inboard track of the left and right inboard flaps, and do all applicable corrective actions, in accordance with paragraph 3.B.2. of the Accomplishment Instructions of Boeing Special Attention Service Bulletin 757-57-0071, dated September 12, 2012. Do all applicable corrective actions before further flight. Thereafter, repeat the inspections at intervals not to exceed 6,000 flight cycles, except as required by paragraphs (g)(1) and (g)(2) of this AD.
(1) For Group 1 airplanes, as identified in Boeing Special Attention Service Bulletin 757-57-0071, dated September 12, 2012, on which any forward support fitting assembly is replaced: Do the next inspection before 15,000 flight cycles have accumulated on that assembly.
(2) For Group 2 airplanes, as identified in Boeing Special Attention Service Bulletin 757-57-0071, dated September 12, 2012, on which any forward support fitting assembly is replaced: Do the next inspection before 18,000 flight cycles have accumulated on that assembly.
(1) Where Boeing Special Attention Service Bulletin 757-57-0071, dated September 12, 2012, specifies compliance times “after the original issue date of this service bulletin,” this AD requires compliance within the specified compliance times “after the effective date of this AD.”
(2) Paragraphs 3.B.1. and 3.B.3. of the Accomplishment Instructions of Boeing Special Attention Service Bulletin 757-57-0071, dated September 12, 2012, are not required by this AD.
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
