MODIFICATIONS TO TOWED JUMPER PROCEDURES10-66. If the above towed jumper procedures must be modified, JMs are responsible for the safety and deployment of all jumpers as long as they are onboard the aircraft. No additional JMs or safeties are required to remain onboard the aircraft unless specified in the jumping unit’s Airborne standard operating procedures.10-67. If all jumpers have exited, those actions described as JM responsibilities are accomplished by the loadmaster(s). The aircrew is responsible for all equipment left onboard the aircraft by the jump unit until it can be retrieved or turned over to the unit concerned.C- A GLOBEMASTER III (PWAC)10-68. The universal static line five-foot extension is required when jumping the C-17A. (Refer to TM 10- 1670-272-23&P for more information.) Time warnings include the following:TWO-HOUR, 20-MINUTE TIME WARNING. This is used only on in-flight rigging missions.TWENTY-MINUTE TIME WARNING. At the 20-minute time warning, all in-flight rigging is complete. All jumpers are alert with helmets fastened. Door bundles are positioned in front of the paratroop doors, inspected, and hooked up to the outboard anchor line cable. Special items of equipment are attached to their respective jumpers and inspected.Note. The 20-minute time warning may be increased to 30 minutes aboard the C-17A if the JMs need more time to accomplish their duties.TEN-MINUTE TIME WARNING. The aircrew turns on the jump caution lights, and then notifies the JM that the inspections are complete. The JMs hook up to their respective inboard anchor line cable and position themselves in front of the wind deflector control panel before beginning to issue jump commands. If both doors are used on one pass, then both JMs issue the commands at the same time.Note. The 10-minute time warning may be increased to 15 minutes aboard the C-17A if the JMs need more time to accomplish their duties.