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RB 211 Maintenance Scope
B-13
− RN 5009 – Renew HP compressor bolts in Jethete material at every service strip.
− RN 5020 - Reduced cyclic life of specific HP compressor rotor Stages 1 to 2 discs
Assembly
− RN 5033 – Fatigue failures of compressor, turbine rotor blades and stator vanes
− RN 5036 – Inspection of HP Compressor Stage 3 disc for corrosion and cracking
(48,000 hours)
• Crack test all rotating components.
• Rebuild and balance the rotor assembly.
• Rebuild the 04 module assembly as per standard procedure.
05 Module:
Turbine Rotor Discs and Shaft IP (Sections 1072 and 1072/A)
• Detail Strip, Clean and Inspect.
• Subject the Turbine Assembly to swash and concentricity checks and comply with RN 5021.
• Embody the following:
− RN 5016 – engine component life limitation data
− RN 5017 – Engine component records and component life marking
− RN 5021 – Interlock blades, acceptance standard
− RN 5025 – Inspection of IP shaft splines (crack test)
− RN 5037 – IP Turbine Blade inspection criteria
− MOD 1186 – IP Turbine disc rim, increasing cooling
− OIAGEN 010 – IP Turbine blade fitment
− OIAGEN 019 – Taper Bolt discoloration
• Strip, crack test and inspect the following components and O/H process:
• IP Turbine Disc
− IP Turbine Inner Bearing Race
− IP Turbine Shaft (RN 5025/20)
− Metering Plate
• IP Turbine Blades re-protect with Sermaloy “J” (MOD 1187).
• In conjunction with the OEM and customer, review the IP turbine creep life.
• Rebuild and balance as per standard procedure.
Nozzle Case and Nozzle Casings (Sections 1080 – 1080A)