(d) If the dimension is not approximately 2.550 in. (64.8 mm), remove the igniter bushing and add or remove gaskets as required to get this dimension.
(e) TORQUE the igniter bushing to between 540 and 600 lbf.in (6.10 and 6.78 m.daN).
(f) Make sure the dimension from the top aft side of the igniter bushing to the inner surface of the combustion chamber outer liner is between 2.534 in. and 2.550 in. (64.36 mm and 64.8 mm).
(g) If the dimension is out of limits, remove the igniter bushing and do steps (b) thru (f) again.
(h) Safety the igniter bushing with lockwire 0.032 in. (0.8 mm) dia (Material No. CP8001) or lockwire 0.032 in. (0.8 mm) dia (Material No. CP8002) to the adjacent mounting bolt of the fuel nozzle.
R R END OF PRE CFM SB 72-0164 R R POST CFMI SB 72-0164 R
R (2) If the igniter bushing was removed, install as follows: R (Ref. Fig. 403/TASK 74-21-30-991-303)
R NOTE : The depth of the spark igniter is controlled by the igniter
____ R bushing and igniter plug gasket(s). Each gasket is 0.015 in. R (0,38mm) in thickness.
R (a) Install two igniter plug gaskets between the igniter bushing and R the combustion case boss.
R (b) Apply graphite grease (Material No. CP2101) to the threads of the R bolts.
R (c) Install the igniter bushing on the combustion case with three R bolts. Torque the bolts to between 1.24 and 1.36 m.daN (109.73 R and 120.35 lbf.in).
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R (d) Measure dimension Z from the combustion chamber outer liner inner
R surface to the top of the igniter bushing. Measure at the
R locations just aft of the igniter hole with a depth (hook) gage.
R Record this value.
R (e) Dimension Z must be 2.534-2.550 in. (64,36-64,77mm). If dimension
R Z is not in limits, adjust the number of igniter plug gaskets
R (one minimum to eight maximum) to get dimension Z.
R (f) If you remove the igniter bushing to adjust the igniter plug
R gaskets, torque the bolts to between 1.24 and 1.36 m.daN (109.73
R and 120.35 lbf.in). Make sure dimension Z is still in limits.
R (g) Safety wire the bolts together. Use lockwire 0.032 in. (0.8 mm)
R dia (Material No. CP8001) or lockwire 0.032 in. (0.8 mm) dia
(Material No. CP8002).
R
R END OF CFMI SB 72-0164
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R (3) Install the spark igniter.
R (a) Apply a small amount of graphite grease (Material No. CP2101) to R the spark igniter threads that connect with the igniter bushing R in the combustion case boss.
R (b) Install the spark igniter into the igniter bushing by hand until R it touches the bottom. TORQUE the spark igniter to between 260 and 290 lbf.in (2.93 and 3.27 m.daN).
R (c) Remove the protective covers from the ignition lead.
(d) 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.
(e) 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.
1 Install the new blue symmetrical silicone seal (10) on the
_
ignition lead.
END OF PRE SB 74-002
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(f) 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
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