Airworthiness Directive · Amendment 39-18855 · Engine oil cooler
General Electric Company Turbofan Engines
This AD applies to General Electric Company (GE) GE90-76B, GE90-85B, GE90-90B, GE90-94B, GE90-110B1, and GE90-115B turbofan engines with a fuel/oil lube/servo cooler (“main fuel oil heat exchanger”), part number (P/N) 1838M88P11 (VIN UA541461-12) or 1838M88P13 (VIN UA541461-14), with a serial number (S/N) listed in paragraph 1.A of GE Service Bulletin (SB) GE90-100 S/B 79-0034, Revision 03, dated August 05, 2016; or GE SB GE90 S/B 79-0058, Revision 02, dated August 05, 2016.
We are adopting a new airworthiness directive (AD) for certain General Electric Company (GE) GE90 turbofan engines. This AD was prompted by a report of an engine and airplane fire. This AD requires replacing affected fuel/oil lube/servo coolers ("main fuel oil heat exchangers") with a part eligible for installation. We are issuing this AD to correct the unsafe condition on these products.
Within 12 months after the effective date of this AD, replace the main fuel oil heat exchanger with a part eligible for installation.
For the purposes of this AD, a part eligible for installation is a main fuel oil heat exchanger:
(1) That has been repaired in accordance with the Accomplishment Instructions, paragraphs 3.C.(2) through 3.C.(7), of GE SB GE90-100 S/B 79-0034, Revision 03, dated August 5, 2016; or GE SB GE90 S/B 79-0058, Revision 02, dated August 05, 2016; or
(2) with an S/N not listed in paragraph 1.A. of GE SB GE90-100 S/B 79-0034, Revision 03, dated August 05, 2016; or SB GE90 S/B 79-0058, Revision 02, dated August 05, 2016.
