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RB 211 Maintenance Scope
B-12
Combustion Outer Case (Section 1090-1090/A)
• Detail strip, clean and inspect.
• Re-protect the outer casing with Sermetal “W” coating
Combustion Liner (Sections 1092-1092A-1092B)
• Detail Strip, Clean and Inspect.
• Embody the following:
− OIA 040 – Debris in front combustion liner
− OIA 043 – Revised HP Turbine honeycomb seal clearances
• Consign the Front Combustion Liner for condition assessment then overhaul process.
Combustion Outer Case Fittings (Section 1093)
• Detail Strip, Clean and Inspect.
Compressor Casing and Vanes HP (Section 1662)
• Detail Strip, Clean and Inspect.
• Visually inspect all casings, cones and inner shrouds. Replace ‘Metco’ and ‘Feltmetal’
linings and repaint. Inspect integrity of all rivets, trap nuts, alignment pins and borescope
plug locations plates.
• Inspect all Stators and route for overhaul process.
• Rebuild as per standard procedure and machine casing assembly to the appropriate machine
instruction drawing.
• Embody the following:
− OIA 032 – Stage 5 stator vane feet frottage
− OIA 035 – Stage 5 stator vane failure
Compressor Rotor HP (Section 1664)
• Detail Strip, Clean and Inspect.
• Remove all blades, visually inspect and overhaul process.
• Strip HP compressor rotor to overhaul process Stage 1 and 2 Disc assembly, Stage 3 Disc
and rear Compressor Shaft.
• Inspect locking plates Stages 1 through 4.
• Incorporate MOD 1167 – Improved bolt material on combustor.
• Embody the following:
− RN 5003 – Replacement of HP compressor curvic coupling joint bolts.