REMOVAL

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.