R  Subtask 28-16-42-860-054 
R  B. Aircraft Maintenance Configuration 
R  (1) Make sure that the applicable fuel tank is defueled (Ref. TASK 28-25-
R  00-650-001) . 
R  (2) Make sure that the remaining fuel has been drained from the 
R  applicable fuel tank (Ref. TASK 28-25-00-650-003). 
R  (3) Make sure the access platform is below the applicable zone 540(640). 
R  (4) Make sure that the applicable access panel is removed 540AB(640AB) 
R  (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-27-11-000-001). 
R  (5) Make sure that the applicable sure door 540BZ(640BZ) is open and the 
R  HOOK-COVER (RIB2-SURGE DOORS) (98D57004014000) is installed. 
R  4. Procedure_________ 
R  (Ref. Fig. 402/TASK 28-16-42-991-002) 
R  Subtask 28-16-42-420-053 
R  A. Preparation for Installation 
R  WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL_______ 
R  MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. 
R  OBEY THE MANUFACTURERS INSTRUCTIONS. 
R  PUT ON PROTECTIVE CLOTHING. 
R  DO NOT GET THEM IN YOUR MOUTH. 
R  DO NOT SMOKE. 
R  DO NOT BREATHE THE GAS. 
R  THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. 
R  GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED. 
R  (1) Clean the component interfaces and the adjacent area with a 
R  MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS 
R  (Material No. 11-004). 
R  (2) Make sure that the parts retained from the removed component are 
R  clean and in the correct condition. 
R  (3) Do an inspection of the component interface and/or the adjacent area. 
R  (4) Lubricate the new O-ring (1) with FUELS (Material No. 01-001) or 
R  COMMON GREASE (Material No. 04-012).

R  Subtask 28-16-42-420-051 
R  B. Installation of the Check Valve 222QM(223QM), 224QM(225QM) 
R  (1) Install the new O-ring (1) on the check-valve (2). 
R  (2) Remove the blanking plugs from the disconnected line ends. 
R  (3) Install the check-valve (2). 
R  (4) Connect the pipe (3) to the check-valve (2). 
R  Subtask 28-16-42-410-051 
R  C. Close Access 
R  (1) Make sure that the work area is clean and clear of tool(s) and other 
R  items. 
R  (2) Remove the HOOK-COVER (RIB2-SURGE DOORS) and carefully close the 
R  applicable RIB 2 surge door: 
R  - FOR 222QM, 223QM 
R  close 540BZ 
R  - FOR 224QM, 225QM 
R  close 640BZ. 
R  (3) Install the applicable wing access panel (Ref. TASK 28-10-00-910-
R  002), (Ref. TASK 57-27-11-400-001): 
R  - FOR 222QM, 223QM 
R  install 540AB. 
R  - FOR 224QM, 225QM 
R  install 640AB. 
R  Subtask 28-16-42-865-054 
R  D. Remove the safety clip(s) and the tag(s) and close this(these) circuit 
R  breaker(s): 
R  1QA, 2QA, 7QA, 8QA, 11QA, 12QA. 
R  Subtask 28-16-42-710-051 
R  E. Operational test 
R  (1) Do the operational test of the check valves 222QM(223QM) and 
R  224QM(225QM) (Ref. TASK 28-21-00-710-002).

R  5. Close-up________ 
R  Subtask 28-16-42-650-053 
R  A. Fuel Configuration 
R  (1) Refuel, defuel or transfer fuel as necessary (Ref. TASK 12-11-28-650-
R  003), (Ref. TASK 28-25-00-650-001) or (Ref. TASK 28-25-00-869-001). 
R  Subtask 28-16-42-942-052 
R  B. Removal of Equipment 
R  (1) Remove the safety barriers. 
R  (2) Remove the warning notice(s). 
R  (3) Remove the access platform(s). 
R  (4) Remove the ground support and maintenance equipment, the special and 
R  standard tools and all other items.

_________________________________________________________ REMOVAL/INSTALLATION
____________________
 TASK 28-16-43-000-001
 Removal of the Pressure Holding Valve 218QM(219QM)
 WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______ START A TASK ON OR NEAR:
 -
THE FLIGHT CONTROLS

 -
THE FLIGHT CONTROL SURFACES