Inspection Procedures. - TB-1-1520-237-20-2460003

TB 1--1520--237-20--246

ALL

Pushrod Assy, Adj, Yaw

70400-02264-061

1680-01-159-4623

60A/L

Rod Assy, Adj, Lat

70400-02264-062

3040-01-116-4719

60A/L

Rod Assy, Adj,

70400-02264-064

3040-01-085-4284

60K

Connect Link, Rig, Lat

70400-22264-045

1680-01-159-4631

60K

Pushrod Assy, Adj, Lat

70400-22264-047

3040-01-158-6090

Parts to be Inspected. -

NOMENCLATURE

PART NUMBER

NSN

Nut, Plain Hexagon

70400-02267-102

5310-01-100-2063

Inspection Procedures.

a. Open/remove main rotor pylon sliding cover.

CAUTION

Careful removal of corrosion preventive compound (CPC) from the jamnut may be required to

properly conduct this visual inspection. Use non-metallic scraper for removal of CPC and extreme

care not to inflict scratches on the jamnut during this process.

NOTE

There is no requirement to remove the control rod(s) to conduct this inspection. Use of an inspec-

tion mirror for the underside surface of each jamnut is recommended.

b. Using a non-metallic scraper, remove CPC and visually inspect each (collective, longitudinal, lateral

and yaw) control rod jamnut (P/N 70400-02267-102) fore and aft of the boost servo assemblies as listed in

paragraph 6. for visible cracks. The jamnut locations are provided in TM 1-1520-237-23P-4 (figure 49), or

TM 1-1520-250-23P-2 (fig 439).

(1) If no cracks are found on any of the control rod jamnuts, proceed to para 9.a..

(2) If any cracks are found or suspected, proceed to para 9.b..

(3) If inspection criteria is not met, proceed to paragraph 9.b..

c. Recurring Inspection - A recurring inspection of the control rod jamnuts will be required at each 30

hour/42 day PMS-1 IAW paragraph 12.e. of this TB. The removal of the CPC from the jamnuts is not required

to complete the recurring inspections.

Correction Procedures.

a. If no cracks are found -

(1) Re-apply CPC as required.

(2) Re-install/close main rotor pylon sliding cover.

(3) Clear the red horizontal dash / / - / / entry required IAW para 1.a..

b. If a cracked jamnut is found or suspected -

NOTE

Prior to removal of the control rod assembly, contact the Technical POC in para 16.a.. If the

control rod is not required for further analysis, it may be re-installed in the aircraft.

(1) Remove and replace the affected control rod assembly IAW TM 1-1520-237-23-6 (para-

graphs 11-4-77 and 78, 11-4-80 and 81, 11-4-84 and 85), or TM 1-1520-250-23-5 (paragraphs 11.25.9 and

10, 11.25.12 and 13, 11.25.16 and 17).