ClearCommand 9000 Series Throttle - Solenoid Clutch QFA & DVTP
Qualitative Failure Analysis
The following qualitative failure analysis is provided to show compliance with:
• Subchapter K Small Passenger Vessels, 46 CFR 121.620
• Subchapter L Offshore Supply Vessels, 46 CFR 130.120
• Subchapter T Small Passenger Vessels, 46 CFR 184.620
121.620 Propulsion engine control systems.
a A vessel must have two independent means of controlling each propulsion engine. Control
must be provided for the engine speed, direction of shaft rotation, and engine shutdown.
b One of the means may be the ability to readily disconnect the remote engine control linkage to
permit local operation.
c A multiple engine vessel with independent remote propulsion control for each engine need
not have a second means of controlling each engine.
d In addition to the requirements of paragraph (a) of this section, a vessel must have a reliable
means for shutting down a propulsion engine, at the main pilot house control station, which is
independent of the engine's speed control.
e A propulsion engine control system, including pilothouse control, must be designed so that a
loss of power to the control system does not result in an increase in shaft speed or propeller
pitch.
f All microprocessor or computer based systems must meet the requirements of part 62 in
subchapter F of this chapter.
130.120 Propulsion control.
a Each vessel must have--
1. A propulsion-control system operable from the pilothouse; and
2. A means at each propulsion engine of readily disabling the propulsion-control system to
permit local operation.
b Each propulsion-control system operable from the pilothouse must enable--
1. Control of the speed of each propulsion engine;
2. Control of the direction of propeller-shaft rotation;
3. Control of propeller pitch, if a controllable-pitch propeller is fitted; and
4. Shutdown of each propulsion engine.
c The propulsion-control system operable from the pilothouse may constitute the remote
stopping-system required by Sec. 129.540 of this subchapter.
Revision List
Rev Date Description
- 4/19/04
Initial Release authored by Tim Jones, approved by Robert Anderson, verified by Jimmy D
Smith.
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