Correction Procedures. - TB-1-1520-237-20-2320004

TB 1--1520--237--20--232

Remove cotter pin and nut from the bolt to be inspected.

k. Inspect the nut to determine the presence of silver plating. The nut (except P/N MS9364-17) should

be cadmium plated, (gold in color).

WARNING

If a silver colored nut (other than P/N MS9364-17) is installed, the bolt may be subjected

to galvanic coupling (corrosion) internally and must be replaced and a category 1 QDR

submitted IAW para 10.d.(1).

Moisten a clean cloth with cleaning compound solvent . Thoroughly clean the exposed portion of

the bolt, the washers and nut.

m. Inspect the exposed portion of the bolt, washers, and nuts for cracks and visible corrosion, and

check the retaining pin mechanism for binding.

NOTE

Rotate the bolt 360 degrees to view all surfaces. Cracking may occur longitudinally along the

bolt in the threaded area, and laterally across the bolt in the area of the retaining balls.

WARNING

During the inspection, if resistance or binding of the bolt plunger mechanism is ob-

served, do not apply CPC to free the mechanism. The inner core of the bolt may be

corroded and must be rejected.

n. If the visual inspection of any bolt is obstructed or otherwise hindered by location, remove the pivot

bolt to inspect.

o. If there is either cracking or corrosion in the areas of the retaining balls, threaded portion of the bolt,

or the retaining pin hole in the bolt head, or the there is resistance or binding of the plunger mechanism, pro-

ceed to paragraph 9.a..

p. If the nut or washers show signs of corrosion, proceed to paragraph 9.b..

WARNING

Absolutely no cracking or corrosion is allowed on the bolt, nut, or washers.

q. If the bolt, nut, and washers show no signs of corrosion, cracks, or binding, proceed to Paragraph

9.c..

Correction Procedures.

a. If binding, cracks or corrosion was found during the inspection, replace the bolt and reinstall IAW

b. If the nut or washer are corroded, replace both the nut and washer and reinstall IAW paragraph 9.c..

Prior to reinstalling all bolts and attaching hardware, perform the following for each of the 15 pivot

bolts.

(1) Apply corrosion preventive compound (CPC) , Item 114, Appendix D, TM 1-1520-237-23-9

or item 128, Appendix D, TM 1-1520-250-23-6 to each nut and bolt as follows.