OM COCKPIT MICROPHONE. PERFORMED RINGOUT OF MICROPHONE WIRING TO CVR CO NTROL PANEL AND CONTROL PANEL TO CVR WITH SATISFACTORY RESULTS. REFERENCED GIV WDM 23-52-00 AND 23-72-00 FOR WORK PERFORMED. Item/Squawk: 50022552 Ref. Doc. Apvd: Discrepancy: STANDBY FUEL INDICATOR POWER SWITCH WILL NOT LATCH.