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R  (3) Stop the gas charging equipment when the DETECTOR ACT8800 - GRAS 
R  shows that CO2 (carbon-dioxide) flows out of the outlet hose (2). 
R  (4) Keep all doors closed for 12 hours.
 Subtask 12-21-12-010-061 
R  B. Opening of all Pressure Sealed Doors 
R  WARNING : STOP THE OPENING PROCEDURE IF THE RED WARNING LIGHT FLASHES._______ 
R  RESIDUAL PRESSURE COULD CAUSE THE DOOR TO OPEN WITH A SUDDEN 
R  FORCE AND INJURE PERSONS AND/OR DAMAGE THE AIRCRAFT. 
R
 WARNING : DO NOT BREATHE THE GAS ._______
 CARBON DIOXIDE IS POISONOUS AND CAN KILL YOU. 
R 
R  (1) Make sure that there is sufficient airflow around the aircraft. 
R  (2) Open the forward and aft cargo-compartment doors (Ref. TASK 52-30-00-
R  860-001). 
R  (3) Open all avionics compartment access-doors (Ref. TASK 52-41-00-010-
R  002). 
R  (4) If a bulk cargo-compartment door is installed, open it (Ref. TASK 52-
R  30-00-860-006). 
R  (5) Open all passenger/crew doors (Ref. TASK 52-10-00-010-001).

 

R  Subtask 12-21-12-080-050 
R  C. Removal of the Equipment 
R  (Ref. Fig. 301/TASK 12-21-12-991-008, 302/TASK 12-21-12-991-002) 
R  (1) Disconnect the gas charging equipment from the air-outflow valve 
R  adapter (1). 
R  (2) Remove the outlet tube (2) and the adapters (1). 
R  (3) Remove the masking tape (Mat. No. 08-074) from the outlet of the: 
R  - Waste-water drain masts (Ref. AMM 30-71-00) 
R  and 
R  - All fuselage drain valves (Ref. TASK 53-00-00-991-001).
 Subtask 12-21-12-861-062 
R  D. Energize the ground service network
 (Ref. TASK 24-41-00-861-002)
 Subtask 12-21-12-618-050 
R  E. Removal of the Remaining CO2 (Carbon-Dioxide) 
R  WARNING : DO NOT BREATHE THE GAS ._______ 
R  CARBON DIOXIDE IS POISONOUS AND CAN KILL YOU. 
R  WARNING : USE THE CORRECT BREATHING EQUIPMENT. THE GAS IS POISONOUS._______ 
R  (1) Do the ground air pre-conditioning for a minimum of 30 min to remove 
R  the remaining CO2 from all areas (Ref. TASK 12-33-21-618-001). 
R  (2) Do a check of the CO2 concentration. 
R  (a) Use a DETECTOR ACT8800 - GRAS and examine the aircraft for 
R  remaining CO2. 
R  (b) Make sure that there is less than 5% Vol. CO2 concentration 0.2 m 
R  (0.65 ft.) above the cabin floor level.

 

 5. Close-up________ 
R
 Subtask 12-21-12-410-055 
R  A. Close Access 
R  (1) Remove the ground support and maintenance equipment, the special and 
R  standard tools and all other items. 
R  (2) Remove the warning notice(s). 
R  (3) Install the filler-panels of the center service channel in the 
R  forward cabin utility area (Ref. TASK 25-25-11-400-001). 
R  (4) Close the cockpit sliding window 8DG2 (Ref. TASK 56-12-11-410-001). 
R  (5) Close all pressure sealed doors. 
R  (a) Wait 1 hour before you close all the doors. 
R  (b) Close the forward and aft cargo compartment doors (Ref. TASK 52-
R  30-00-860-002). 
R  (c) Close the avionics compartment access-doors (Ref. TASK 52-41-00-
R  410-002). 
R  (d) If a bulk cargo-compartment door is installed, close it 
R  (Ref. TASK 52-30-00-860-008). 
R  (e) Close the passenger/crew door(s) (Ref. TASK 52-10-00-410-001). 
R  (6) If you did the task in a hangar with under floor areas: 
R  WARNING : DO NOT BREATHE THE GAS ._______ 
R  CARBON DIOXIDE IS POISONOUS AND CAN KILL YOU. 
R  WARNING : USE THE CORRECT BREATHING EQUIPMENT. THE GAS IS POISONOUS._______ 
R  (a) Carefully open the sealed areas of the hangar and do a check for 
R  remaining CO2 concentration with a DETECTOR ACT8800 - GRAS. 
R  (b) Make sure that there is less than 5% Vol. CO2 concentration 0.2 m 
R  (0.65 ft.) above the floor of the under-floor areas of the 
R  hangar.

 

 Subtask 12-21-12-862-062
R B. De-energize the ground service network (Ref. TASK 24-41-00-862-002)

 TASK 12-21-12-100-001
 Cleaning of the Cockpit Display-Units

 1.
 Reason for the Job

　
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