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ENG-145 Ver 1.0 4 -04
ClearCommand 9 000 Ser-Thr Sol-Cl Qualitative Failure Analysis & Design Verification Tes t P rocedure
Document #
ENG-145
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.
130.120 Propulsion control.
ClearCommand 9000 Series
Servo Throttle – Solenoid Clutch
Qualitative Failure Analysis & Design
Verification Test Procedure
Version: 1.0
AUTHOR
CHECKED
Tim Jones
Jim D Smith
(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.
(1) One of the means may be the ability to readily disconnect the remote
engine control linkage to permit local operation.
(b) A multiple engine vessel with independent remote propulsion control for each
engine need not have a second means of controlling each engine.
(c) 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.
(d) 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.
(e) All microprocessor or computer based systems must meet the requirements of
part 62 in subchapter F of this chapter.
(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.
(a) 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.
(a) The propulsion-control system operable from the pilothouse may constitute the
remote stopping-system required by Sec. 129.540 of this subchapter.
(b) Each propulsion-control system, including one operable from the pilothouse,
must be designed so that no one complete or partial failure of an easily replace-
APPROVED
DATE
Robert
4-19-04
Anderson
Appendix B-11
ZF Mathers , LLC.
12125 Harbour Reach Drive, Suite B
Mukilteo WA 98275
U.S.A.
Tel: 425-583-1900
Fax: 425-493-1569
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