TM 10-1670-296-20&P                                                    0006 00 0006 00-21 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: 38 Y-Connector Mounting Box (C-5).  Check Y-connector mounting box for missing components, ability to mount Y- connector, and damage. Mounting box cannot secure Y- connector or tie-down bracket. 39 Control Box.  Check for missing components and damage affecting serviceability. Box is not complete or obvious damage is found affecting functionality.