Maintenance
 78-30-00-481-041 Make the Thrust Reverser Unserviceable for

 Maintenance
 78-36-00-010-040 Opening of the Thrust Reverser Doors
 78-36-00-410-040 Closing of the Thrust Reverser Doors

 3. Job Set-up
__________
 Subtask 74-21-10-860-051
 A. Aircraft Maintenance Configuration
 (1) On the center pedestal, on the ENG panel 115VU, make sure that a warning notice is in position to tell persons not to start the engine.

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

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 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU ENGINE/1 AND 2/IGN/SYS A 1JH A03
 FOR 1000EM1 121VU ENGINE/IGN/ENG1/SYS B 3JH1 P41 121VU ENGINE/IGN/ENG1/SYS A BAT 2JH1 P39
 FOR 1000EM2 121VU ENGINE/IGN/ENG2/SYS B 3JH2 P42 121VU ENGINE/IGN/ENG2/SYS A BAT 2JH2 P40
 Subtask 74-21-10-010-059
 C. Get Access
 (1) Make sure that the fan cowl doors are open: (Ref. TASK 71-13-00-010-040) FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR

 (2) Make sure that the thrust reverser doors are open: (Ref. TASK 78-36-00-010-040) FOR 1000EM1 451AL, 452AR FOR 1000EM2 461AL, 462AR

 Subtask 74-21-10-040-055
 D. Make sure that the thrust reverser is unserviceable (Ref. TASK 78-30-00-481-041).
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 4. Procedure
_________
 Subtask 74-21-10-420-054
 A. Installation of the Right Ignition Lead:
 CAUTION : BE CAREFUL WITH THE LEAD TO PREVENT DAMAGE TO THE CONDUIT AND
_______
 INTERNAL WIRES.

 (1) Remove protective caps.

 (2) Apply vaseline (Material No. CP5070) to new 0-rings (20).

R (3) Install the new O-ring (20) and O-ring (20) on the ignition lead fitting.
 (4) Carefully push the ignition exciter end of the ignition lead forward through the holes in the bundle junction box cover until the flange fitting of the ignition lead is seated against the bundle junction box cover.

 (5) Install the retaining plate so the angled edge points aft above the ignition lead at the aft end of the tube bundle junction box. Hand-tighten the bolt.

 (6) TORQUE the bolt to between 100 and 110 lbf.in (1.13 and 1.24 m.daN).

 (7) Engage the ignition lead into the clips on the junction box, the 6 o'clock strut, the TGB, and the fan frame.

 (8) Connect the forward end of the ignition lead to the upper ignition exciter.

 (9) TORQUE the ignition lead connector to between 140 and 160 lbf.in

 (1.58 and 1.80 m.daN).
 (10) Install the strut fairings on both side of the tube bundle (6 o'clock position).

 PRE SB 74-002

 (11) Install the caged spring assembly to the ignition lead. Make sure that the large shoulder end of the caged spring assembly is at the contact end of the ignition lead.

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R (12) Install the new white chamfered silicone seal (10) to the ignition lead. The small diameter collar of the white chamfered silicone seal must be put into the large collar of the caged spring assembly. POST SB 74-002
 (13) Install the new blue symmetrical silicone seal (10) on the ignition lead. END OF SB 74-002

 (14) Install the ignition lead.

 CAUTION : DO NOT APPLY GREASE OR ANY LUBRICANT TO THE THREADS OF THE
_______ CONNECTOR ON THE IGNITION LEAD. GREASE AND LUBRICANTS WILL CAUSE DAMAGE TO THE IGNITION LEAD AND THE SPARK IGNITER.
 CAUTION : MAKE SURE THAT YOUR HANDS AND TOOLS ARE CLEAN. DO NOT TOUCH
_______ THE IGNITION LEAD OR THE SPARK IGNITER WITH DIRTY OR GREASY HANDS AND TOOLS, DIRT AND GREASE WILL CAUSE DAMAGE TO THE IGNITION LEAD AND THE SPARK IGNITER.
 (a) Install the ignition lead into the spark igniter, and TORQUE the coupling nut of the ignition lead to between 260 and 290 lbf.in
　
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