TM 55-1520-240-23-4
5-21.3
INSPECT ROTOR HUB SURFACE
(Continued)
5-21.3
NOTE
Procedure is same for forward and
aft heads.
1.
Position head (1) so that splines (2) on underside
are accessible.
2.
Remove lacquer finish from a 1 inch wide strip
(3) around splines (2). Use acetone (E20) and
clean cloths (E120).
3.
Remove primer coat to bare metal from strip
(3). Use abrasive pads (E2) and acetone (E20).
Wear gloves (E186).
4.
Rinse finish removal area with a clean cloth
(E120) soaked in water. Dry area with a clean
dry cloth.
5.
Perform fluorescent-penetrant inspection of
strip (3) around splines (2). (Refer to TM
1-1500-335-23.) There shall be no cracks. If a
crack is suspected, refer to TM 1-1520-253-23.
6.
If no cracks are found, remove inspection
coating. (Refer to TM 1-1500-335-23.)
7.
Refinish strip (3) as follows:
a.
Apply one coat of wash primer (E302). Wear
gloves (E186). Let air dry for 1 hour. Do not
let dry more than 4 hours.
b.
Apply one coat of fast drying primer (E294).
Wear gloves (E186). Let air dry for 1 hour.
Do not let dry more than 2 hours.
Lacquer (E213) is extremely
flammable. It can be toxic. Keep away
from heat, sparks, or open flame. In
case of contact, immediately flush
skin or eyes with water for at least
15 minutes. Get medical attention
for eyes.
c.
Apply two coats of black lacquer (E215).
Wear gloves (E186). Let air dry 1 hour
between coats.
FOLLOW-ON MAINTENANCE:
None
END OF TASK
5-110
