Airworthiness Directive · Amendment 39-17842 · Powerplant
The Boeing Company Airplanes
(1) This AD applies to The Boeing Company Model 757-200, -200PF, -200CB, and -300 series airplanes, certificated in any category, equipped with Rolls-Royce RB211-535E4, -535E4-B, and -535E4-C engines; or with Rolls-Royce RB211-535E4, -535E4-B, and -535E4-C engines that have air intake cowls that were modified by Bombardier Aerospace Supplemental Type Certificate (STC) ST02102NY (http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/256325188c3b1f2f8625705f004dd977/$FILE/ST02102NY.pdf), commonly known as 535E4X cowls.
(2) Installation of supplemental type certificate (STC) ST01518SE (http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/48e13cdfbbc32cf4862576a4005d308b/$FILE/ST01518SE.pdf) does not affect the ability to accomplish the actions required by this AD. Therefore, for airplanes on which STC ST01518SE is installed, a “change in product” alternative method of compliance (AMOC) approval request is not necessary to comply with the requirements of 14 CFR 39.17.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 757-200, -200PF, -200CB, and -300 series airplanes. This AD was prompted by reports of cracking of the forward bulkhead web, web stiffeners, attachment angles, and thermal anti-ice (TAI) spray ring assemblies of the engine air intake cowl. This AD requires replacing the forward bulkhead assembly, TAI spray ring assembly, and attachment fittings of the air intake cowl. We are issuing this AD to prevent the failure of air intake cowl components due to cracking, which could result in the air intake cowl separating from the engine and striking critical airplane control surfaces that could result in a loss of airplane control; severe engine damage and loss of thrust; or large parts striking a person or property on the ground.
For airplanes on which the air intake cowls were replaced before the effective date of this AD using a kit or parts identified in paragraph (g)(1), (g)(2), or (g)(3) of this AD: Within 144 months since replacement of the air intake cowl, or according to the applicable time specified in paragraphs (h)(1) through (h)(l2) of this AD, whichever is later, replace the air intake cowl with a cowl which has had the forward bulkhead assembly, TAI spray ring assembly, and associated attachment fittings of the air intake cowl replaced using a kit or new parts, in accordance with the Accomplishment Instructions of Bombardier Alert Non-Modification Service Bulletin RB211-E4-A1003, Revision 3, dated February 4, 2014 (for engines with air intake cowls modified by Bombardier Aerospace STC ST02102NY (http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/256325188c3b1f2f8625705f004dd977/$FILE/ST02102NY.pdf, commonly known as a 535E4X cowls); or Rolls-Royce Alert Non-Modification Service Bulletin RB.211-71-AG698, excluding Appendix 1 and including Appendices 2, 3, and 4, Revision 2, dated June 20, 2013 (for engines having Dyna-Rohr or Bombardier standard air intake cowls). Repeat the replacement thereafter at intervals not to exceed 144 months.
(1) RB211-E4A1003KIT, or all the parts listed in Appendix 3 of Bombardier Alert Non-Modification Service Bulletin RB211-E4-A1003, Revision 3, dated February 4, 2014 (for engines with air intake cowls modified by Bombardier Aerospace STC ST02102NY (http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/256325188c3b1f2f8625705f004dd977/$FILE/ST02102NY.pdf, commonly known as a 535E4X cowls).
(2) RB211-71-AG698-E4KIT, or all the parts listed in Appendix 3 of Rolls-Royce Alert Non-Modification Service Bulletin RB.211-71-AG698, Revision 2, dated June 20, 2013 (for engines with Dyna-Rohr standard air intake cowls).
(3) RB211-71-AG698-E4BKIT, or all the parts listed in Appendix 4 of Rolls-Royce Alert Non-Modification Service Bulletin RB.211-71-AG698, Revision 2, dated June 20, 2013 (for engines with Bombardier standard air intake cowls).
For airplanes other than those identified in paragraph (g) of this AD: At the applicable time specified in paragraphs (h)(1) through (h)(12) of this AD, replace the air intake cowl with a cowl which has had the forward bulkhead assembly, TAI spray ring assembly, and associated attachment fittings of the air intake cowl replaced using a kit or new parts, in accordance with the Accomplishment Instructions of Bombardier Alert Non-Modification Service Bulletin RB211-E4-A1003, Revision 3, dated February 4, 2014 (for engines with air intake cowls modified by Bombardier Aerospace STC ST02102NY (http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/256325188c3b1f2f8625705f004dd977/$FILE/ST02102NY.pdf, commonly known as a 535E4X cowls); or Rolls-Royce Alert Non-Modification Service Bulletin RB.211-71-AG698, excluding Appendix 1 and including Appendices 2, 3, and 4, Revision 2, dated June 20, 2013 (for engines with Dyna-Rohr or Bombardier standard air intake cowls). Repeat the replacement thereafter at intervals not to exceed 144 months.
(1) For airplanes with air intake cowls having serial numbers 4001 through 4121 inclusive: Replace within 12 months after the effective date of this AD.
(2) For airplanes with air intake cowls having serial numbers 4122 through 4241 inclusive: Replace within 24 months after the effective date of this AD.
(3) For airplanes with air intake cowls having serial numbers 4242 through 4361 inclusive: Replace within 36 months after the effective date of this AD.
(4) For airplanes with air intake cowls having serial numbers 4362 through 4481 inclusive: Replace within 48 months after the effective date of this AD.
(5) For airplanes with air intake cowls having serial numbers 4482 through 4484 inclusive: Replace within 60 months after the effective date of this AD.
(6) For airplanes with air intake cowls having serial numbers 9001 through 9117 inclusive: Replace within 60 months after the effective date of this AD.
(7) For airplanes with air intake cowls having serial numbers 9118 through 9237 inclusive: Replace within 72 months after the effective date of this AD.
(8) For airplanes with air intake cowls having serial numbers 9238 through 9357 inclusive: Replace within 84 months after the effective date of this AD.
(9) For airplanes with air intake cowls having serial numbers 9358 through 9477 inclusive: Replace within 96 months after the effective date of this AD.
(10) For airplanes with air intake cowls having serial numbers 9478 through 9597 inclusive: Replace within 108 months after the effective date of this AD.
(11) For airplanes with air intake cowls having serial numbers 9598 through 9717 inclusive: Replace within 120 months after the effective date of this AD.
(12) For airplanes with air intake cowls having serial numbers 9718 through 9786 inclusive: Replace within 132 months after the effective date of 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
