0014 00  TM 10-1670-287-23&P  Conduct a Ripcord Pin Test for the MC-4 with a Main Mounted FF-2 as follows:  WARNING  NOTE  Change 2  0014 00-39  The FF-2 must be able to pull the main ripcord pin positively and  completely to ensure adequate travel of the FF-2 power cable. Inadequate travel of the FF-2 power cable may cause the parachute  to not deploy, resulting in serious injury or death of the parachutist. The FF-2 Test (power cable length of travel) will be performed each  time the main parachute is initially placed in service and whenever  the main closing loop has been replaced. It is recommended that a  “shop” FF-2 be utilized to withdraw the ripcord pins thus eliminating  the over use of existing FF-2s.  1.  Test routing and installation of the FF-2 in the parachute harness/container while the  harness/container is being worn in the normal fashion.  2.  Properly attach and secure an FF-2 by aligning rectangular key on end of power cable housing and  insert in corresponding slot in base plate. 