The following test requirements are based on CCS standards:

1 Inspection content

(1) Inspections of Z propulsion arrangement are to include document examination and in-process inspections and functional tests.

(2) In-process inspections are to mainly include material tests, non-destructive tests of main parts, inspections of manufacturing and assembly qualities of parts, etc.

(3) The main parts such as power shaft, vertical shaft, propeller shaft, gear shaft, gear, coupling and important bolt are to be subjected to mechanical property tests of materials.

(4) The Z propulsion arrangement is classified according to the model and the maximum power.

The first product is to be type-tested according to Article 8 of this Guideline. The

subsequent products may be tested according to the unit/batch inspection items.

2 The reports or records required to be submitted by the manufacturing works are to at least include:

(1) Quality assurance certificate and/or re-test report of physicochemical properties of materials of main product parts processed at the manufacturing works;

(2) Certificate of conformity and relevant certificates of main purchased or outsourced parts;

(3) Inspection, measurement and test conditions of manufacturing works, a list of test and inspection equipment and copies of valid verification certificates;

(4) Test report of manufacturing works, which is to include the model, specifications and serial number of product or sample, test place and date, test environment, test items and data, problems discovered during test and inspection and corresponding solutions, and test results.

3 In general, unit/batch inspection items are to include:

(1) Visual inspection;

(2) Overall idling test;

(3) Pitch control test (where applicable);

(4) Hydraulic test of pressure element;

(5) Functional test of alarm/safety;

(6) Tightness test;

(7) Gear engagement inspection;

(8) Safety valve/spill valve setting test;

(9) Turning test;

(10) Up-and-down/outward-swaying test (where applicable);

(11) Calibration test of zero rudder angle.

4 For the Z propulsion arrangement type-modified after type test, CCS may reduce relevant test items or test time during the inspection provided that its maximum transmission power or maximum torque is not more than that of the prototype and its construction is similar to or main components are carried over from the prototype. The overall idling test may be reduced to 2 h.

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