Section 2 Machinery survey requirements during construction

2.1.1 The requirements of SSC Rules Pt 9, Ch 2 Surveys During Construction, Installation and Sea Trials, are applicable together with the additional requirements of this Section.

2.1.2 New ACVs intended for Classification are to be built under LR Survey. Any items found not to be in accordance with the Rules or the appraised plans, or any material, workmanship or arrangements found so to be, are to be rectified or concession sought from LR.

2.2.1 The propeller and lift fan equipment is to be subject to an initial survey, and periodic surveys. This shall be addressed in accordance with approved maintenance manuals and schedules, and the equipment shown is to be to the attending Surveyor’s satisfaction.

2.2.2 LR is to be provided with copies of relevant certificates and evidence of continuing to maintain certification under EASA Part 21 and Part 145 approvals as applicable to the organisation. LR will conduct an initial visit and periodic visits in accordance with a certification schedule agreed with LR in order to verify compliance.

2.3.1 Each installation is to be surveyed and tested by the Surveyor in accordance with the approved plans.

2.4.1 Where the secondary means of steering is by means of a skirt shift system, the system is to be surveyed at the construction yard and demonstrated during trials.

2.5.1 Trials schedules are to be drawn up and submitted to LR for consideration.

2.5.2 The Performance Trial is to include sufficient continuous operation at main engine MCR to demonstrate satisfactory performance of the ACV.

2.5.3 Sea trials are to include the operation of any anchoring equipment including deployment and recovery.

2.5.4 The results of the trials are to be reported to LR.

2.6.1 Trials are to be conducted on all prototype ACV to show or determine:

1. That the assumptions made as regard to the weights and centres of gravity of the ACV as a whole and its major components (hull, machinery, loads, etc.) are reasonably correct.

2. That the stability and control of the ACV can be effectively maintained in all accepted conditions of weather and loading.

3. That the accepted conditions of operation are within the safe limits of all operating parameters.

4. That there is no undue vibration in the hull structure or machinery.

5. That, on completion of all other tests and trials, all controls and systems relating to the operation, safety and reliability of the ACV are functioning satisfactorily.

2.6.2 In particular, the trials schedules for prototype vehicles are to include the following:

1. An endurance trial of agreed length at main engine MCR.

2. Emergency crash stop procedure.

3. Slow and fast turning to port and starboard.

4. Taxiing and manoeuvring waterborne (and on land if amphibious).

5. Where applicable, moving on and off a typical landing site under representative conditions (amphibious craft).

6. Simulated engine failure, single or multi-engine designs.

7. Anchoring arrangements are to be verified (required if the classification notation ‘1’ is required).

8. With battery starting, a minimum of six consecutive engine starts under operational conditions, with due precautions against overheating of starting equipment.

9. Bilge and/or dewatering pumping and vehicle trimming systems under operating conditions.

10. Simulated use of protective, fire-fighting, life-saving and other safety equipment.

11. Examination of gearing after trials, so far as is practicable.

2.7.1 Trials are to be conducted on all vehicles made subsequent to, but to the same plans and details as, a previously classed prototype ACV. In general, routine production ACV need not be subjected to such extensive trials as those required for prototype vehicles, but shall in any case demonstrate:

1. That all controls and systems relating to the operation, safety and reliability of the ACV are functioning satisfactorily.

2. That any modifications from the prototype, or alterations in the operation and maintenance instructions given in the Operator’s Handbooks, are practicable and reasonable.

2.8.1 Trials are to be made on ACV which have been significantly modified, overhauled or repaired to ensure to the Surveyors’ satisfaction that the vehicle has been returned in a satisfactory condition for its intended service.