TM 9-2320-209-34-1 CHAPTER 19 REAR WINCH (M764) SYSTEM TROUBLESHOOTING 19-1. EQUIPMENT ITEMS COVERED. This chapter gives equipment troubleshooting procedures for the M764 rear winch system, for which there are authorized corrective maintenance tasks at the direct support and general support maintenance level. 19-2. EQUIPMENT ITEMS NOT COVERED. All equipment items for which corrective maintenance is authorized at the direct support and general support maintenance level are covered in this chapter. 19-1