REPAIR AFT TRANSMISSION OUTSIDE SURFACE
Smooth blended area with crocus cloth (E122).
Do not leave any sharp edges.
Acid etch reworked area as follows:
Prepare a solution of 3 parts acetic acid
(E21) in 7 parts water. Wear gloves (E186)
Swab area with solution for 2 minutes. Use
gauze sponges (E184).
Rinse area with cold water.
Fluorescent inspect reworked area to check for
cracks (TM 1-1500-335-23). There shall be no
cracks. If crack is suspected in aft transmission
outside surface, refer to TM 1-1520-253-23.
Apply surface treatment to reworked area as
Clean area with naphtha (E245) and clean
cloths. Wear gloves (E186). Let area air dry.
If area is on cover (1), swab solution of
alodine powder (E65) in water on area. Swab
for 2 to 5 minutes. Use gauze sponges
(E184). Rinse area with cold water and let air
dry. Wear gloves (E186).
If area is on housing (2), swab on solution of
chromic acid (E114) and calcium sulphate
(E91). Swab until metal becomes dull gold to
brown. Use gauze sponges (E184). Rinse
area with cold water and let air dry. Wear
Apply epoxy primer (E293) to reworked area. Let
air dry for 2 hours. Wear gloves (E186).
Apply epoxy topcoat (E166). Wear gloves
END OF TASK