TM-9-1240-401-34-P
TELESCOPE MOUNT M146: M118A2 AND M118A3; TELESCOPE MOUNT M145: M145A1; PANORAMIC TELESCOPE: M117 AND M117A2; FIRE CONTROL QUADRANT: M15; PERISCOPE: M42
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
JULY 1993
TM-9-1240-401-34-P - Page 313 of 590
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.
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