Rolls-Royce 250-C18 Series Operation and Maintenance Manual – C18, C18A, C18B, C18C Turboshaft Engines

Description

Rolls-Royce 250-C18 Series Operation and Maintenance Manual

This Rolls-Royce 250-C18 Series Operation and Maintenance Manual is the comprehensive field and shop reference for the 250-C18, 250-C18A, 250-C18B, and 250-C18C turboshaft engines. Published under Rolls-Royce publication reference 5W2, this Sixth Edition (Revision 7, dated 1 March 2003) provides FAA-approved operating procedures, maintenance practices, troubleshooting guidance, and technical specifications for these reliable powerplants used in helicopter and rotorcraft installations.

File Details

• Manual Type: Operation and Maintenance Manual
• Brand: Rolls-Royce
• Models Covered: 250-C18, 250-C18A, 250-C18B, 250-C18C
• Publication Reference: 5W2
• Edition: Sixth Edition
• Revision: Revision 7
• Edition Date: 1 December 1995
• Revision Date: 1 March 2003
• Language: English
• Page Count: 380 pages
• File Format: PDF
• Approval: FAA Approved

Chapters Covered

• Introduction — General information, engine description overview, conditions for performing outlined tasks, and Authorized Maintenance Center network guidance
• Section I — Engine Description — Compressor assembly, combustion section, turbine, power and accessories gearbox, fuel system (configurations A, B, C, and D), system control, gas producer fuel control, power turbine fuel governor, fuel pump and filter assembly, fuel nozzle, lubrication system, ignition system, temperature measurement system, anti-icing system, compressor bleed air system, water-alcohol system, engine specifications and ratings, fuel specification, oil specification, approved oils, and engine trend check analysis
• Section II — Engine Operation — Engine operating precautions, engine operating limits, engine speed limits, power turbine speed restrictions, temperature limits, torque limits, oil pressure and temperature limits, pressure altitude and ambient temperature, engine operating procedures (start and ground idle, normal start procedure, cold weather start procedure, power range, augmented takeoff, practice autorotation descent and landing, air restart, anti-icing air, stopping, alternate shutdown, postflight inspection, emergency procedures), cold weather fuels, mixing alternate cold weather fuels, cold weather oils, time between overhauls, modular TBO, on-condition parts, life limited parts, log book entries, and trend check procedure
• Section III — Engine Maintenance — General maintenance, special service tools, general maintenance practices, consumable materials, acceptable marking pens and pencils, lockwire and cotter pins, torques, universal fittings, locknut installation, airframe/engine interface connections, rigid tube installation, flared tubes, flanged tubes, cleaning, compressor cleaning and preservation, bleed valve cleaning, compressor salt water contamination removal, cleaning water-alcohol residue, corrosion treatment and surface finish repair, galvanic corrosion protection, engine preservation and depreservation, oil system preservation, fuel system preservation, fuel system depreservation, compressor preservation, lubricants, troubleshooting, inspections (preflight, postflight, scheduled, special), vibration inspection, hard landing limits, sudden engine stoppage inspection, compressor inlet air blockage, engine submerged while in operation, hot start inspection, snow ingestion inspection, erosion or corrosion inspection, on-condition inspection, lightning strike inspection, systems maintenance, fuel system maintenance, fuel control maintenance, fuel pump and filter assembly maintenance, lubrication system maintenance, ignition system maintenance, temperature measurement system, anti-icing air system, bleed air system, compressor maintenance, turbine assembly maintenance, combustion section maintenance, power and accessories gearbox maintenance, engine check run, vibration test procedure, and engine preparation for storage and shipment

Across its 380 pages, this 250-C18 operation and maintenance manual delivers the full scope of information needed to operate, service, troubleshoot, and maintain these engines. Section I breaks down every major component and system with cross-sectional illustrations and schematics, including detailed fuel control system diagrams for each configuration. Section II establishes the operating envelope with precise limits for speed, temperature, torque, and oil pressure, alongside step-by-step procedures for normal and cold weather starts, power management, and emergency handling. Section III forms the largest portion, offering a deep troubleshooting table with dozens of symptoms and remedies, detailed inspection schedules, and maintenance procedures for every major assembly from the compressor and turbine to the fuel control, governor, and gearbox.

Engine Coverage

This manual covers four engine variants in the 250-C18 series. The 250-C18 and 250-C18B are designed for horizontal installation, while the 250-C18A and 250-C18C are configured for installation at a 47-degree nose-up attitude. Aircraft equipped with water-alcohol augmentation can use this system only with the 250-C18B and 250-C18C models. The manual also notes specific power turbine speed restrictions applicable to certain gearbox serial numbers (CAG 20183, 20185, 20193 through 20265, 20508, 21001 through 21395, 21600 through 21706, and 21800 through 21803), with instructions to lift these restrictions only after the gearbox has been reworked per Rolls-Royce Commercial Engine Bulletin 250 CEB-90.

What This Manual Enables You to Do

With this Rolls-Royce 250-C18 series maintenance manual at hand, you can perform scheduled inspections at 100, 200, 300, and higher hourly intervals; adjust the gas producer fuel control for idle speed, maximum speed, and start derichment; replace the fuel nozzle, fuel pump, fuel control, and power turbine governor; clean and preserve the compressor; troubleshoot issues ranging from light-off failures and acceleration problems to oil pressure fluctuations and excessive vibration; check the fuel system for leaks using the vacuum check procedure; verify the fuel control max speed stop setting; and prepare an engine for storage or shipment. The troubleshooting section alone — Table 6 — covers over 60 distinct trouble items with probable causes and remedies, making this an invaluable diagnostic resource.

Why It Matters

Turbine engines demand precise maintenance. Incorrect torque values, misadjusted controls, or overlooked wear limits can lead to power loss, component failure, or worse. This manual provides the manufacturer’s official recommendations, FAA-approved limits, and detailed procedures that help ensure every task is done correctly. The inclusion of special service tool references, torque tables, wear limits, and step-by-step instructions makes it a practical guide for both routine servicing and complex repairs.

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