X_ positioned in front of airplane with trailer 25 feet from second of above trailers and trucks faced in opposite directions, 3.1.3.3 Empty pig is marked with identification symbols and placed in tray on "cave! 3.2 Operations, 3.2.1 Threa personnel directly engaged in removal operations are designated by number and duties as follows: 3.2.1.1 Number one (1) primarily cuts the wire or unlocks stress latches to free filter holder, 3.2.1.2 Number two (2) primarilypulls holder from filter unit and carries it to cave, 3.2.1.3 Number three (3) primarily rolls paper and inserts it into pig. 20202 Freeing Filter Holders, With vehicles positioned near aircraftas described above and with proper tools in hand, numbers one and two take initial . positios side by side between trailer and aircraft at least 25 feet from filter unit. Womber . one advances to unit,:cuts wire or opens latches and returns to tool trailer after making sure holder will not fall out of own accord. He places cutting or opening tool in rack, takes up long-handled tongs and returns to initial position by number two. 3.2.3 Removing Filter Holder, Number two advances to unit, inserts hook on removal pole into ring on holder and pulls gently to withdraw holder, Caution: Number two must be ready to prevent holder from striking ground as it leaves filter unit, Number one stands by at initial position to assist in recovery of holder if for some reason it should fall to ground from pulling pole or to recover paper if it should fall from holder, (Note: None of these events are likely because of the basic design of holder 223 AFWLERC SWEH-2~003))