TM 55-2835-209-23
3-5 REPLACE IGNITER PLUG FERRULE (AVIM) (CONT)
REMOVAL
NOTE
The retainers (1) securing the
ferrule (2) to the combustion
chamber are not angled the
same.
Retainer shall be se-
lected to match the contour of
the combustor case dome.
Only one retainer requires re-
moval.
1.
Grind away retainer (1) weld and re-
move retainer.
NOTE
Remaining ferrule may require
expanding floating clearance
between ferrul
to make ferrul
er.
2.
Remove ferrule
INSTALLATION
e and retainer
e removal easi-
(2).
1.
Using abrasive paper (D26), lightly
sand combustion chamber to prepare
for welding.
2.
Thoroughly clean the area, using
1,1,1-trichloroethane (D41).
3.
Install ferrule (2) in combustion
chamber.
4. Align new retainer (1) 180 degrees
opposite remaining retainer.
5.
Fusion arc weld retainer (1) to com-
bustion chamber.
6.
File weld to blend with combustion
chamber.
7. Adjust floating clearance between
two retainers (1) and ferrule (2) to
0.001 to 0.025 inch.
3-14
Change 1
8.
Visually inspect to insure retainer
(1) is secure and ferrule (2) is
free to float.
9.
Penetrant test for cracks in welded
area.
Apply post-emulsifiable pene-
trant solution, component of pene-
trant inspection kit (D27) to area
with cotton applicator (D1O). Leave
on for 5 minutes.
Keep wet.
10. Wipe off excess penetrant with
1,1,1-trichloroethane (D41) and ma-
chinery towel (D20). Inspect for
proper fusion.
