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RB 211 Maintenance Scope
B-5
Compressor Rotor HP (Section 1664)
• Inspect the HP compressor rotor path linings and incorporate modifications 1115 and 1189, if
required. Reprotect if necessary.
• Incorporate Mod 1167 - Improved bolt material on combustor.
• Replace the curvic coupling bolts in accordance with RN5003, if required.
• Inspect the HP compressor rotor blades, stators, and repair as necessary.
• Crack test the following components and reprotect if satisfactory:
Stage 1-2 HP Compressor Disc
Stage 3 HP Disc (RN5036)
Stage 4, 5 and 6
Stage 1-6 HP Blades
Stage 1-5 HP Compressor vanes
Combustion Liners (Sections 1092 – 1092/A – 1092/B)
• Consign the Front combustion Liner for condition assessment and overhaul.
Turbine Rotor Discs and Shaft HP (Sections 1071-1071/A)
• Dimensionally inspect the Panel Support and Rotor Disc Location.
• Subject the following components to crack testing.
HP Turbine Disc
HP Turbine Blades
Panel Support
HP Turbine Bearing Inner Race
Conical Shaft
• Visually inspect the remaining components.
• Renew the thermal barrier coating on the rear combustion liner.
Nozzle Case and Nozzle Vanes HP (Section 1081)
• Strip to detail.
• Inspect the HP Seal Segments, repair and renew the Honeycomb seals as necessary.
• Consign the HP NGV’s for repair, as required, and reprotection with Sermaloy ‘J’ coating in
accordance with Mod 1110.