TM 1-1520-238-23
Change 1
5-256.9
5.57A.
TAIL ROTOR HUB ASSEMBLY REMOVAL/INSTALLATION (AVIM) – continued
i. Find center of fork:
(1) Divide dimension C by 2 and record on line 8.
(2) Subtract dimension 1D from quotient recorded on line 8 and record difference on line 9.
(3) Subtract dimension 2D from quotient recorded on line 8 and record difference on line 10.
(4) Subtract figure recorded on line 4 from figure recorded on line 9 and record difference on line 11.
(5) Subtract figure recorded on line 5 from figure recorded on line10 and record difference on line 12.
NOTE
Allow 0.010 to 0.012 INCH clearance on each side of hub and upper fork assemblies.
Allow 0.002 to 0.003 INCH clearance on each side of hub and lower fork assemblies.
(6) Subtract proper precompression clearance (line 13 A or B) from figure recorded on line 11 to determine
hub side #1 spacer stack thickness and record difference on line 14.
(7) Subtract proper precompression clearance (line 13 A or B) from figure recorded on line 12 to determine
hub side #2 spacer stack thickness and record difference on line 15.
j. Inspect (QA).
GO TO NEXT PAGE
