R TASK 26-21-00-720-003- 01

R  Check Distribution Piping for Leakage and Obstruction 
R  1. Reason for the Job__________________ 
R  Refer to the MPD TASK: 262100-04 
R  2. Job Set-up Information______________________ 
R  A. Fixtures, Tools, Test and Support Equipment 
R  -------------------------------------------------------------------------------
R  REFERENCE  QTY DESIGNATION 
R  -------------------------------------------------------------------------------

R  No specific  circuit breaker(s) safety clip(s) 
R  No specific  compressed air source (up to 2.07 bars (30 psi)) 
R  No specific  warning notice 
R  No specific  access platform 1.60 m (5 ft. 3 in.) 
R  98D26203002004  1 TEST TOOL - ENGINE FIRE EXTINGUISHING SYSTEM 

R B. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R 26-21-41-400-001 R R 71-13-00-010-040 R 71-13-00-410-040 R 78-30-00-081-041 R R 78-30-00-481-041 R R 78-36-00-010-040 R 78-36-00-410-040 R 26-21-00-991-008 Installation of the Engine Fire-Extinguisher Bottle (6WE1,8WE1,6WE2,8WE2) Opening of the Fan Cowl Doors Closing of the Fan Cowl Doors Make the Thrust Reverser Serviceable after Maintenance Make the Thrust Reverser Unserviceable for Maintenance Opening of the Thrust Reverser Doors Closing of the Thrust Reverser Doors Fig. 504

R 3. Job Set-up
__________

R  Subtask 26-21-00-865-084 
R  A. Open, safety and tag this(these) circuit breaker(s): 
R  -------------------------------------------------------------------------------
R  PANEL DESIGNATION IDENT. LOCATION 
R  -------------------------------------------------------------------------------
R  121VU ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B 2WE1 Q44 
R  121VU ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A 1WE1 Q43 
R  121VU ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B 2WE2 Q42 
R  121VU ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A 1WE2 Q41 
R  Subtask 26-21-00-860-067 
R  B. Safety Precautions 
R  (1) On the center pedestal, on the ENG panel 115VU: 
R  - Put a warning notice in position to tell persons not to start the 
R  engine. 
R  (2) Make sure that the engine 1(2) shutdown occurred not less than 5 
R  minutes before you do this procedure. 
R  (3) On the ENG section of the maintenance panel 50VU: 
R  (a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton 
R  switch is off. 
R  (b) Put a warning notice in position to tell persons not to energize 
R  the FADEC 1(2). 
R  Subtask 26-21-00-010-068 
R  C. Get Access 
R  (1) Open the fan cowl doors: 
R  (Ref. TASK 71-13-00-010-040) 
R  (a) For engine 1, 
R  437AL, 438AR. 
R  (b) For engine 2, 
R  447AL, 448AR.

R Subtask 26-21-00-040-053

R  D. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041). 
R  Subtask 26-21-00-010-069 
R  E. Get Access 
R  (1) Open the left thrust reverser halves: 
R  (Ref. TASK 78-36-00-010-040) 
R  (a) For engine 1, 
R  452AR. 
R  (b) For engine 2, 
R  462AR. 
R  (2) Put the access platform in position. 
R  (3) On the left engine pylon, remove the access doors: 
R  415BL, 415BR. 
R  (4) On the right engine pylon, remove the access doors: 
R  425BL, 425BR. 
R  4. Procedure_________ 
R  (Ref. Fig. 504/TASK 26-21-00-991-008) 
R  Subtask 26-21-00-720-059 
R  A. Functional Test to Do a Check of the Distribution Piping for Leakage and 
R  Obstruction 
R  (1) Obstruction test 
R  (a) On the related pylon: 
R  WARNING : BE VERY CAREFUL WHEN YOU MOVE A FILLED FIRE_______ 
R  EXTINGUISHER BOTTLE. A HEAVY SHOCK COULD CAUSE 
R  PERCUSSION. 
R  NOTE : If the bottles are not installed, go to the step (b).____ 
R  - Remove the four screws and washers which attach the aft 
R  fire-extinguisher bottle (1).

R R  Distribution Line - Test (CFM56-5B) Figure 504/TASK 26-21-00-991-008- 12 (SHEET 1)
　
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