(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).
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B. 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 74-21-30-040-055
C. Make sure that the thrust reverser is unserviceable (Ref. TASK 78-30-00-481-041).
Subtask 74-21-30-865-056
D. 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
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4. Procedure
_________
(Ref. Fig. 401/TASK 74-21-30-991-300)
Subtask 74-21-30-420-055
A. Installation of a Plastic Drift
CAUTION : ALIGN THE COMBUSTION CHAMBER FERRULE WITH THE COMBUSTION CASE
_______ BOSS AND THE IGNITER BUSHING BEFORE YOU INSTALL THE SPARK IGNITER. IF NOT, DAMAGE TO THE SPARK IGNITER CAN OCCUR.
(1) Remove the protective covers from the igniter bushing and put a plastic drift, 0.375 in. (9.52 mm) maximum diameter, through the igniter bushing, the boss of the combustion case and the combustion chamber ferrule to align them.
Subtask 74-21-30-350-051
B. Loosen the ferrule and align it with the igniter bushing and the combustion case boss.
(1) If the ferrule is not easy to move, apply liquid wrench (Material No. CP2162).
Subtask 74-21-30-420-053
C. Installation of the spark igniter R R PRE CFMI SB 72-0164 R
(1) If the igniter bushing was removed, install as follows: (Ref. Fig. 402/TASK 74-21-30-991-301)
NOTE : The depth of the spark igniter is controlled by the igniter
____ bushing and igniter plug gasket(s). Each gasket is 0.015 in.
(0.38 mm) in thickness.
(a) Install the igniter plug gaskets that were removed between the igniter bushing and the combustion case boss.
(b) Temporarily install the igniter bushing in the combustion case boss and tighten with your hand.
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R Removal/Installation of the Igniter Bushing - PRE SB 72-0164 Figure 402/TASK 74-21-30-991-301
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(c) Measure the dimension from the top aft side of the igniter bushing to the inner surface of the combustion chamber outer liner. The dimension must be approximately 2.550 in. (64.8 mm).
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