AD 2013-14-51

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FAA Aviation Safety EMERGENCY AIRWORTHINESS DIRECTIVE www.faa.gov/aircraft/safety/alerts/

DATE: July 12, 2013 AD #: 2013-14-51 This emergency airworthiness directive (AD) supersedure is sent to owners and operators of General Electric Company (GE) GE90-110B1 and GE90-115B turbofan engines. Background This emergency AD supersedure was prompted by a report of one additional failure of a transfer gearbox assembly (TGB) radial gearshaft, outside the suspect population identified in AD 2013-10-52, which resulted in an in-flight shutdown (IFSD). Two earlier failures of the TGB radial gearshaft prompted the issuance of AD 2013-10-52. Inspections have found three additional radial gearshafts with cracks. Investigation has revealed that the failures were caused by TGB radial gearshaft cracking and separation. This condition, if not corrected, could result in additional IFSDs of one or more engines, loss of thrust control, and damage to the airplane. Relevant Service Information We reviewed GE GE90-100 Series Alert Service Bulletin (ASB) No. GE90- 100 S/B 72-A0568, dated July 10, 2013. The ASB provides additional information regarding the affected TGB radial gearshafts. FAA’s Determination We are issuing this AD because we evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design. AD Requirements This AD prohibits operation of an airplane with affected TGB radial gearshafts installed on both engines five days after receipt of this emergency AD. Interim Action We consider this AD to be an interim action. We anticipate that further AD action will follow. Authority for this Rulemaking Title 49 of the United States Code specifies the FAA’s authority to issue rules on aviation safety. Subtitle I, Section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the Agency’s authority. We are issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701, “General requirements.” Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This

2 regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Presentation of the Actual AD We are issuing this AD under 49 U.S.C. Section 44701 according to the authority delegated to me by the Administrator. 2013-14-51 General Electric Company: Directorate Identifier 2013-NE-17-AD (a) Effective Date This Emergency AD is effective upon receipt. (b) Affected ADs This AD supersedes AD 2013-10-52, which was issued as an Emergency AD on May 16, 2013, and as a final rule, request for comment on June 13, 2013 (78 FR 38195, June 26, 2013). (c) Applicability General Electric Company (GE) GE90-110B1 and GE90-115B turbofan engines with a transfer gearbox assembly (TGB) radial gearshaft, part number 1995M24P02, serial number (S/N) listed in Figure 1 to paragraph (c) of this emergency AD, installed.

Figure 1 to Paragraph (c) – TGB Radial Gearshaft S/N’s FIA0KCYG FIA0JETA FIA0H0VJ FIA0HL0C FIA0K63F FIA0J7V2 FIA0K62R FIA0HLY9 FIA0K3A3 FIA0KCYM FIA0K63C FIA0HL0E FIA0JVRE FIA0JJ6E FIA0K89H FIA0HL0F FIA0H0VM FIA0JNJH FIA0KCYK FIA0HL0G FIA0K3A4 FIA0K62W FIA0K3A5 FIA0HLY7 FIA0K62T FIA0K89P FIA0HWKA FIA0HJTE FIA0JJ53 FIA0JJ57 FIA0KCYR FIA0HJTJ FIA0K89W FIA0JJ56 FIA0HWKE FIA0HJTG FIA0KCW8 FIA0KH9Y FIA0J7WH FIA0HJTC FIA0K3A6 FIA0KCYP FIA0JER9 FIA0HJTF FIA0HY8C FIA0JJ55 FIA0JNJJ FIA0HJTH FIA0K3AP FIA0KH9G FIA0JVRR FIA0HJTA FIA0J7WG FIA0KH9H FIA0JNJM FIA0HJR9 FIA0JVRL FIA0KH9K FIA0KH9R FIA0HWJ7 FIA0J7V1 FIA0KH9C FIA0KH9P FIA0HY76 FIA0JVRM FIA0K63H FIA0K89C FIA0HY8F FIA0K3AV FIA0K63M FIA0JVRH FIA0H0VK FIA0J7V8 FIA0K62Y FIA0K89L FIA0J7VR FIA0J7WE FIA0JVP9 FIA0JER6 FIA0JJ58 FIA0K3A2 FIA0K63E FIA0JETH FIA0JJ6C FIA0K3A1 FIA0K3AY FIA0H0VC FIA0JNJF FIA0K3AN FIA0JVRT FIA0K3AL FIA0JNJK FIA0JVRP FIA0HY8E FIA0J7VV FIA0JVRC

3 FIA0JJ6F FIA0HY8N FIA0J7VP FIA0J7V4 FIA0JJ6J FIA0J7V0 FIA0J7V9 FIA0JETF FIA0JVRV FIA0J7V3 FIA0HWJ8 FIA0HEG4 FIA0H0VL FIA0J7V5 FIA0H0VA FIA0HWJ9 FIA0K89T FIA0HY8H FIA0KCYL FIA0HWJ5 FIA0K89Y FIA0HEG2 FIA0HY79 FIA0HWJ6 FIA0JETL FIA0K62V FIA0KH9J FIA0J7VW FIA0JER8 FIA0HEGY FIA0HY8G FIA0J7VY FIA0J7WC FIA0HWKC FIA0HY8M FIA0J7VT FIA0JETE FIA0K3A0 FIA0HY8A FIA0J7WF FIA0K3AT FIA0JVRJ FIA0H0VG FIA0J7V6 FIA0JJ59 FIA0K8AA FIA0K3AR FIA0K89G FIA0K3AW FIA0KCYT FIA0JETC FIA0K89K FIA0JVRN FIA0KH9T FIA0KH9W FIA0K89R FIA0JNH8 FIA0HEG1 FIA0JNJC FIA0KCYJ FIA0JETN FIA0HEG3 FIA0K63L FIA0KCYM FIA0JJ6G FIA0HY78 FIA0J7WJ FIA0KCYN FIA0JJ6A FIA0HY75 FIA0JER7 FIA0KCYP FIA0JVRG FIA0HY8K FIA0HEG0 FIA0KCYR FIA0JVRF FIA0HY8L FIA0HLY6 FIA0KH9E FIA0K63K FIA0HY8J FIA0HLY0 FIA0KH9F FIA0J7WK FIA0H0VH FIA0HLY1 FIA0H0T9 FIA0JER5 FIA0H0VF FIA0HLY4 FIA0HLY3 FIA0JETM

(d) Unsafe Condition This emergency AD supersedure was prompted by a report of one additional failure of a TGB radial gearshaft, outside the suspect population identified in AD 2013-10-52, which resulted in an in- flight shutdown (IFSD). Two earlier failures of the TGB radial gearshaft prompted the issuance of AD 2013-10-52. This condition, if not corrected, could result in additional IFSDs of one or more engines, loss of thrust control, and damage to the airplane. (e) Compliance (1) Comply with this AD within the compliance times specified, unless already done. (2) No later than five days after receipt of this emergency AD, do not operate the airplane if more than one installed engine has a TGB radial gearshaft S/N listed in Figure 1 to paragraph (c) of this emergency AD. (f) Alternative Methods of Compliance (AMOCs) The Manager, Engine Certification Office, FAA, may approve AMOCs for this AD. Use the procedures found in 14 CFR 39.19 to make your request.

4 (g) Related Information (1) For further information about this AD, contact: Carlos Fernandes, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; phone: 781-238-7189; fax: 781-238-7199; email: carlos.fernandes@faa.gov. (2) GE Alert Service Bulletin No. GE90-100 S/B 72-A0568, dated July 10, 2013 pertains to the subject of this AD. (3) For the service information referenced in this AD, contact: General Electric Company, GE-Aviation, Room 285, 1 Neumann Way, Cincinnati, Ohio 45215; email: geae.aoc@ge.com; phone: 513-552-3272. (4) You may view this service information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability of this material at the FAA, call 781-238-7125.

Issued in Burlington, Massachusetts, on July 12, 2013.

Frank P. Paskiewicz, Acting Director, Aircraft Certification Service