REPAIR AFT ROTOR SHAFT SUPPORT
Protective gloves (E184.1) shall be
worn for the remainder of the task.
Otherwise, personal injury could
Acid etch the reworked area as follows:
Prepare a solution of 3 parts acetic acid
(E21) in 7 parts water. Wear gloves (E184.1)
Swab the area with solution for 2 minutes.
Use gauze sponges (E184).
Rinse the area with cold water.
Fluorescent inspect the reworked area to check
for cracks (TM 1-1500-335-23). There shall
be no cracks. Alternate inspection method is
the eddy current inspection method. If crack is
suspected in aft rotor shaft support, refer to TM
Apply surface treatment to the reworked area
Clean the area with naphtha (E245) and
clean cloths. Let the area air dry.
Swab on solution of chromic acid (E114) and
calcium sulphate (E91). Swab until metal
becomes dull gold to brown. Use gauze
sponges (E184). Rinse the area with cold
water and let air dry.
Apply epoxy primer (E292 or E293) to the
END OF TASK