Tail Rotor Driveshaft Hanger

BHT-212-CR&O-48. Inspect outer coupling (11) temperature indicatorTEMP-PLATES for deterioration, debonding, ordiscoloration of epoxy coating that preventsinterpretation of indicating dots. If deterioration,debonding, or discoloration of epoxy is found, replaceTEMP-PLATES in accordance with paragraph 65-9A.9. Inspect duplex bearing (19) for roughness andspalling, scoring, pitting, brinelling, flaking, andcorrosion on rolling element or races and for crackedor broken retainers (Figure 65-30). Minor nicks, cuts,or scratches are acceptable provided they are toosmall to be felt with a probe, having an end radius of0.030 inch (0.762 mm), and provided total affectedarea does not exceed 10% of contact area at anypoint. Minor circumferential scoring is acceptable onrollers and races provided it cannot be felt with aprobe, having an end radius of 0.030 inch (0.762 mm),and provided affected area does not exceed 10% ofcontact area at any point.10. Inspect coupling retaining bolt (8, Figure 65-28)visually for damaged threads. Replace bolts withmalformed threads.11. Inspect sleeve (20) for corrosion damage tothreads. No structural damage to threads isacceptable.12. Inspect following parts by magnetic particle(Code M) or fluorescent penetrant (Code F)(BHT-ALL-SPM), as applicable. Demagnetize partsafter magnetic particle inspection.FIGURE,INDEX NO.13. Apply corrosion preventive treatment, if parts arenot processed immediately after inspection (paragraph65-39).65-50. RepairNOMENCLATURECODE65-28, 2 Plate F65-28, 6 Retainer F65-28, 8 Bolt M65-28, 10 Inner Coupling M65-28, 11 Outer Coupling M65-28, 15 Nut F65-28, 17 Spacer M65-28, 20 Sleeve M65-28, 21 Pinion MRefer to BHT-ALL-SPM for specifications.NUMBERMATERIALS REQUIREDNOMENCLATUREC-108 Cadmium PlatingSolutionC-434 TapeC-464 India StoneC-500 Crocus ClothECCN 9E99165-00-0012 MAR 2010 Rev. 8 Page 74A/74B