TB 1--1520--237--20--232
Nut
MS21244-12
14
.63
.82
Nut
MS21244-14
1
.11
.11
5310-00-108-2539
Total Cost per Aircraft (UH-60A) = 9.66
Total Cost per Aircraft (UH-60L) = 0.88
d. TB/MWOs to be applied prior to or concurrently with this inspection. N/A.
e. Publications which require change as a result of this inspection. A copy of this TB will be inserted
in the appropriate TM as authority to implement the change until the printed change is received.
(1) TM 1-1520-237-23-6:
(a) The following paragraphs will be changed as indicated below;
Para 11-4-91.1.3, Install Forward Control Rod
Para 11-4-92.1.3, Install AFT Control Rod
Para 11-4-93.1.3, Install Lateral Control Rod
Para 11-4-94.1.3, Install Long Control Rod
Para 11-4-95.1.3, Install Swashplate Links
Para 11-4-100.1.3, Install Walking Beam
Para 11-4-101.1.3, Install Forward Bellcrank
(b) Add the following procedural prior to step b. in each task identified IAW paragraph
12.e.(1) (a) above.
CAUTION
If resistance or binding of the retaining ball mechanism is observed when pin is actuated, do not apply
corrosive preventive compound to free the mechanism. The inner core of the bolt is corroded and must
be rejected.
"Prior to installing the special self-retaining bolt, depress the retaining pin and fill the bolt with corrosion
preventive compound (CPC) , Item 114, Appendix D. Apply CPC through one ball hole (while working
the retaining pin) until excess is seen at the opposite ball hole. Rotate the bolt 180 degrees and repeat
procedure at the second hole. Spray CPC into the cotter pin hole. While working retaining pin, apply
CPC at the pin hole in the bolt head and into the hole at the threaded end of the bolt. Lightly wipe excess
CPC from the threads and the retaining ball area. Apply CPC Item 109, Appendix D, to the exterior retain-
ing ball area and threads."
(c)
(2) TM 1-1520-250-23-5:
(a) The following paragraphs will be changed as indicated below;
Para 11.25.23, Install Forward Control Rod
Para 11.25.24, Install AFT Control Rod
Para 11.25.25, Install Lateral Control Rod
Para 11.25.26, Install Long Control Rod
Para 11.25.27, Install Swashplate Links
Para 11.26.4, Install Walking Beam
Para 11.26.5, Install Forward Bellcrank
(b) Add the following procedural step prior to step b. in each task identified IAW paragraph
12.e.(2) (a) above.
CAUTION
If resistance or binding of the retaining ball mechanism is observed when pin is actuated, do not apply
corrosive preventive compound to free the mechanism. The inner core of the bolt may be corroded and
must be rejected.
8