And, they simply use a hose to connect the compounds supply of either water or retardant to fill the crafts tank. The supply is either taken from a fire hydrant or a batch mixing plant. After the liquid is replaced, compressed air must also be utilized in the process. As such, compressed air is used for the purpose of dispersing any liquid out. Recertify/refill fire system bottle Recertify/refill fire system bottle. By Rodger Coan-Burningham, January 9, 2018 in Technical Discussions. Share More sharing options... Followers 1. Reply to this topic; Start new topic; Recommended Posts. Rodger Coan-Burningham. Posted January 9, 2018. Dallas, TX - March 8-10. ARSA Repair Symposium. Arlington, VA - March 10. MRO Americas. Dallas, TX - April 26-28. ACPC. San Diego, CA - August 27-30. We would like the opportunity to discuss how we can work together. Contact [email protected] to schedule an appointment. Top marks for craziness: turboprop B-17. 11. Grumman TBF Avenger ‘The Roast Turkey’. Although the bigger aircraft like the B-17s and Catalinas garnered more fame, the portly Grumman Avenger was for a long time the most popular air tanker and formed the backbone of the US firefighting fleet throughout the 1960s and 70s.