TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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6-3 TM 9-1240-401-34&P 6-5. CATEGORIES OF INSPECTION Categories of inspection define responsibilities: a. An initial inspection (ref. para 6-6) is performed immediately on receipt of the M42 periscope for maintenance. This inspection will determine the amount and type of work to be performed. b. A final inspection (ref. para 6-12) is performed after repairs have been completed to ensure the item meets serv- iceability standards. 6-6. INITIAL INSPECTION Item No. Item To Be Inspected Procedures 1 M42 PERISCOPE Inspect M42 periscope (1) for completeness and secureness of parts; must be complete and secure. 2 IDENTIFICATION PLATE Check that identification plate (2) is legible and clearly defined. 3 MOUNTING SURFACE Check that mounting surface (3) is free of burrs and corrosion. 4 WINDOWS Inspect windows (4) for dirt, fungus, or condensation, which may obstruct view; must be clean and free of moisture. Check that win- dows and mirrors are free of fractures, scratches, and breaks. Section Ill. Troubleshooting I 6-7. GENERAL I a. The symptom index can be used as a quick guide to troubleshooting. Common malfunctions are listed in alpha- betical order with page number reference to the troubleshooting table, where a test or inspection and corrective action are provided. b. The general support troubleshooting table (ref. para 6-9) lists the common malfunctions which maybe found dur- ing maintenance of the M42 periscope. Perform the tests/inspections and corrective actions in the order listed. c. There is no direct support maintenance on the M42 periscope.