AD 2007-03-02 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Tay 611-8, Tay 620-15, Tay 650-15, and Tay 651-54 Series Turbofan Engines

This AD applies to Rolls-Royce Deutschland Ltd & Co KG (RRD) Tay 611-8 and Tay 620-15 turbofan engines with low pressure (LP) compressor module part number (P/N) MO1100AA or P/N MO1100AB installed, and Tay 650-15 and Tay 651-54 turbofan engines with LP compressor module P/N MO1300AA or P/N MO1300AB installed. These engines are installed on, but not limited to, Fokker F.28 Mark 0070 and 0100 airplanes, Boeing 727 airplanes modified in accordance with Supplemental Type Certificate No. SA8472SW, and Gulfstream G-IV airplanes. The following P/N LP compressor fan blades are installed in these modules:   Tay 611-8 LP compressor fan blade P/Ns Tay 620-15 LP compressor fan blade P/Ns Tay 650-15 LP compressor fan blade P/Ns Tay 651-54 LP compressor fan blade P/Ns JR30649 JR30649 JR31911 JR31911. JR31702 JR31702 JR31912 JR31912. JR31983 JR31983 JR35120 JR35120.   JR33863 JR35121 JR35121.   JR33864 JR33865   JR33866

You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. Ultrasonic Inspection (UI) of LP Compressor Fan Blades for Certain Tay 650-15 Engines That Have Not Yet Had UI of the LP Compressor Fan Blades (f) For Tay 650-15 engines, serial numbers 17201, 17202, 17226, 17253, 17341, 17356, 17428, 17450, 17457, 17458, 17497, 17530, 17622, 17643, 17655, 17678, 17709, 17751, 17755, 17805, and 17806 that have not yet had UI of the LP compressor fan blades: (1) Within 30 days after the effective date of this AD, perform UI of the LP compressor fan blades for cracks. (2) Use Part 1 of RRD Service Bulletin (SB) No. TAY-72-1591, dated May 8, 2003, to do the inspection. UI of LP Compressor Fan Blades Being Installed in a Different Engine; Tay 650-15 and Tay 651-54 Engines (g) For Tay 650-15 and Tay 651-54 engines, whenever LP compressor fan blades are removed and are being installed in a different engine: (1) Perform UI of the LP compressor fan blades for cracks. (2) Use Part 1 of RRD SB No. TAY-72-1442, Revision 3, dated November 26, 2003, to do the inspection. UI of LP Compressor Fan Blades for All Tay Engines (h) Perform UI of the LP compressor fan blades for cracks, using Part 2 of RRD SB No. TAY-72-1442, Revision 3, dated November 26, 2003, at the following: (1) For Tay 650-15 and Tay 651-54 engines: (i) Initial UI at next shop visit for any reason but no later than 6 months after the effective date of this AD, whichever occurs first. (ii) Repetitive UIs at every engine shop visit for any reason but before reaching every 10,000 flight hours-since-last fan blade UI, whichever occurs first. (2) For Tay 611-8 and Tay 620-15 engines: (i) Initial UI at next shop visit for engine mid-life inspection or overhaul, but no later than 12 months after the effective date of this AD, whichever occurs first. (ii) For Tay 611-8 engines, repetitive UIs before reaching every 8,000 flight hours but no later than every 10 years since-last-fan-blade UI, whichever occurs first. (iii) For Tay 620-15 engines, repetitive UIs before reaching every 10,000 flight hours but no later than every 10 years since-last-fan-blade UI, whichever occurs first. LP Compressor Fan Blades That Are Cracked (i) If any LP compressor fan blade is cracked, then remove the complete LP compressor fan blade set and the LP compressor fan disc from service. Alternative Methods of

This AD results from a report that a set of LP compressor fan blades failed before reaching the LP compressor fan blade full published life limit. We are issuing this AD to prevent LP compressor fan blades from failing due to blade root cracks, leading to uncontained engine failure and damage to the airplane.