(2)
 On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a warning notice is in position to tell persons not to energize the FADEC 1(2).

 (3)
 On the AIR COND panel 30VU, make sure that the ENG 1(2) BLEED and APU BLEED pushbutton switches are released. Make sure that the warning notice is in position to tell persons not to operate the pneumatic system.

 (4)
 In the cockpit, on the HP ground connector, make sure that the warning notice is in position to tell persons not to pressurize the pneumatic system.

 Subtask 26-21-49-865-054

 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B 2WE1 Q44 121VU ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A 1WE1 Q43 121VU ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B 2WE2 Q42 121VU ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A 1WE2 Q41
 Subtask 26-21-49-010-055
 C. Get Access
 (1)
 Make sure that the left fan cowl is removed (Ref. TASK 71-13-11-000-040):

 -
FOR 1000EM1
 437AL,

 -
FOR 1000EM2
 447AL.

 (2)
 Make sure that the left thrust reverser half is removed (Ref. TASK 78-32-11-000-040):

 -
FOR 1000EM1
 451AL,

 -
FOR 1000EM2
 461AL.

 (3)
 Make sure that the access platform is in position.

 (4)
 Make sure that the following access doors are removed:

 -
FOR 1000EM1
 413AL, 415AL, 415BL,

 -
FOR 1000EM2
 423AL, 425AL, 425BL.

 (5)
 Make sure that the apron assembly is removed (Ref. TASK 54-57-22-000-001).

 1EFF : ALL 1 26-21-49Page 410 1 1 May 01/05R 1 1 1CES 1

 Subtask 26-21-49-040-051

 D. Make sure that the thrust reverser is unserviceable (Ref. TASK 78-30-00-481-041).
 4. Procedure
_________
 (Ref. Fig. 401/TASK 26-21-49-991-003, 402/TASK 26-21-49-991-004)
 Subtask 26-21-49-420-052
 A. Installation of the Fire-Extinguishing Pipes
 (1)
 Clean the component interface and/or the adjacent area.

 (2)
 Do an inspection of the component interface and/or the adjacent area.

 (3)
 Remove the blanking plugs from the disconnected line ends.

 (4)
 Install the fire-extinguishing pipe (view B):

 (a)
 Put a new O-ring (13) in position on the pipe (15).

 (b)
 Install the pipe (9).

R (c) Hold the nut (8) and TORQUE the nut (7) to between 800 and 900 R lbf.in (9.04 and 10.17 m.daN) on the pipe (9).
 (d)
 Install the washers (12), the bolts (11), the nuts (14) and tighten.

 (e)
 Install the two washers (36) and bolts (35) and tighten.

 (f)
 Install the clamp (32) on the clamp block (31) with the bolts

 (30) and tighten.
 (5) Install the left lower bulkhead assy (view E):
 (a)
 Put the bulkhead (29) in position.

 (b)
 Install the bolts (23), (24) and (25), the washers (27), the nuts

 (28) and tighten.

 (c)
 Apply a layer of SEALANTS (Material No. 09-002) with a brush, around the pipes (37) and (9), and against the bulkhead (29).

 Subtask 26-21-49-720-051

 B. Test
 (1) Do a check of the engine fire-extinguishing distribution piping for leakage and obstruction (Ref. TASK 26-21-00-720-003).
 Subtask 26-21-49-420-053
 C. Installation of the Fire-Extinguishing Pipe
 (1) Install the fire-extinguishing pipe (views C and D):
 (a)
 Put the news O-rings (2) in position on the pipe (4).

 (b)
 Install the pipe (4).

 (c)
 Tighten by hand the knurled nut (3) until it stops.

 (d)
 Put the rubber pad (19) in position.

 (e)
 Install the washers (18), the spacers (17), the bolts (16) and tighten.

 (f)
 Safety the knurled nuts (3) with corrosion resistant steel lockwire 0.8 mm (0.032 in.).

 5. Close-up
________ Subtask 26-21-49-420-054
 A. Put the aircraft back to its initial configuration.
　
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