Type 139-158 (FU Amplifier AS)
Raytheon Anschütz Type 139-158 (FU Amplifier AS) — Advanced follow-up amplifier for CAN-bus steering systems.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Verify dual CAN-bus connections are properly terminated, monitored, and functioning in redundant configuration per IEC 61162-460
Test wire break alarm function (Type 148-620 device) - confirm 24V monitoring triggers immediately upon disconnection and halts follow-up steering without rudder movement
Measure actual rudder angle using Type 136-065 indicator against command signal; verify ±1° accuracy and <50ms response time per IMO SOLAS requirements
For Type 139-155/159 proportional amplifiers: verify torque motor current, solenoid valve modulation, and time to full rudder deflection (<30 seconds); test at Bridge/Local/Emergency modes
ComPilot 20: Verify all pre-wired connections per installation drawings, test earth continuity, confirm 24VDC supply voltage regulation ±10%, and validate emergency steering bypass circuit function
Type-general inspection and maintenance points for this equipment category — not model-specific.
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