TM 55-1520-240-23-4
5-6
INSPECT ROTARY-WING HEADS
(Continued)
5-6
h.
Damage to edge of pitch arm (16) where
washer contacts arm when pitch link bolt is
installed shall not exceed 0.060 inch in depth.
i.
Damage to arm faces (17) around bolt hole
shall not exceed 0.040 inch in depth.
j.
Damage to remaining areas (18) of pitch arm
(16) shall not exceed 0.050 inch in depth.
j.1.
Damage to fillet areas (18.1) where pitch arm
blends into housing shall not exceed 0.010
inch in depth.
k.
Damage to six lugs (19), pockets (20), and
center housing areas (21) shall not exceed
0.005 inch in depth.
NOTE
There may be two different five-digit
codes marked on the part. The
five digit code 81996 is not the
manufacturers CAGE code. If found,
the number 81996 identifies the part
as having been manufactured IAW
government technical data package
(TDP). Use the five-digit IAW steps
k3, k5 and k6 to determine the
manufacturers CAGE code.
k.1.
Locate the inboard tie-bar pin assemblies,
three (3) per rotor head, TM 55-1520-240-23P.
k.2.
Remove the pin for inspection. Refer to Task
5-23.1.
k.3.
Identify the five-digit manufacturers CAGE
code or manufacturers name on the end of
the pin. If the inboard tie-bar pin is marked
with one of the following CAGE codes, the
pin is serviceable:
(A)
CAGE code 63259 (Boniface Tool and
Die)
(B)
CAGE code 56811 (Olympic Tool and
Machine)
(C)
CAGE code 77272 (Boeing)
NOTE
If the pin contains only one CAGE
code (81205) along with the part
number, the pin is considered
serviceable. If the pin contains two
CAGE codes (81205 and 81966)
along with the part number, the part
is considered unserviceable. The pin
with the two CAGEs could reflect an
army procurement which has been
improperly identified.
(D)
CAGE code 81205 (Boeing Seattle)
k.4.
If the pin is serviceable, re-install IAW Task
5-23.2.
k.5.
If pin is unserviceable, or if CAGE code or
manufacturers name cannot be identified,
replace with serviceable part from the supply
system as defined above.
k.6.
Locate the outboard tie-bar pin assemblies,
three per rotor head, TM 55-1520-240-23P.
k.7.
Remove the pin for inspection. Refer to Task
5-23.1. Repeat steps k2 thru k5.
l.
Damage to tanks (22) shall not exceed 0.020
inch in depth by 2.5 inches in length.
5-34
