TM 10-1670-296-20&P                                                    0006 00 0006 00-20 Table 2.  Preventive Maintenance Checks and Services – continued B – Before D – During A – After INTERVAL ITEM NO. B D A ITEM TO BE CHECKED   OR SERVICED EQUIPMENT NOT READY/ AVAILABLE IF: 36 Y-Connector.  Check Y- connector for secure attachment.  Ensure LED illuminates when lamp test is depressed. Y-connector has been forced off mounting area.  LED does not illuminate when lamp test is depressed. 37 Y-Connector Mounting Box (C-130, C-141, C-17).  Check Y-connector mounting box for missing components, proper operation of extendable arms, ability to mount Y-connector to both positions, and damage. Mounting box cannot secure Y- connector.