Many repair jobs are designated by the ship or approved by the repair activity as ship-to-shop jobs. In this type of job, the ships force does a large part of the repair work For example, the repair or renewal of a damaged pump shaft might well be written up as a ship-to-shop job. The ships force will disassemble the pump and remove the shaft. Then the shaft and any necessary blueprints or technical manuals are delivered to the designated shop of the repair activity. After the shaft has been repaired, or a new one has been made, it is picked up and brought back to the ship by the ships force. The pump is reassembled, inspected, and tested by the ships force to make sure it is operating satisfactorily.

An important thing to remember is that the repair facility is responsible for ensuring that its personnel repair or manufacture this this to the manufacturers specifications, perform all tests required by quality assurance (QA), and fill out properly all the required forms. You, however, are responsible for witnessing any test required by QA, monitoring the status of the job at all times, and reassembling and test operating the pump properly. The end results will produce a reliable, operating piece of equipment.

EQUIPMENT TESTS

As an EN2, you will assist in scheduling and performing various tests on your equipment. The purpose of those tests is to determine how your equipment is performing and if there are any equipment malfunctions. The tests are performed at various times, such as (1) before the ship goes to the shipyard for overhaul, (2) after post deployment, (3) during a tender availability, or (4) as required by PMS. The tests are performed by the ships force, IMA personnel, shipyard personnel, or an inspection team (such as a Board of Inspection and Survey [INSURV]). Detailed types of inspections are described in COMNAVSURFLANT Maintenance Manual, COMNAVSURFLANT INST. 9000.lC or COMNAVSURFPAC Ship and Craft Maintenance Manual, Volumes 1 and 2, Planned Maintenance, COMNAVSURPAC INST. 4700.lB. Two types of inspections and tests that can be used to spot impending trouble in an internal combustion engine are called trend and spectrographic analyses. We will now discuss and explain their importance and use in detecting problems in internal combustion engines.