Tail Rotor Driveshaft Hanger

BHT-212-CR&05. Inspect oil level sight glass (21) forcracks, crazing, scratches, or discoloration.Inspect indicator (22) for stained or peeledpaint.6. Inspect chip detector (17) for obviousdamage.7. Inspect gearbox case for corrosion andfor elongated mounting bolt holes (figure 65-7).8. Perform fluorescent penetrant inspectionof gearbox case (BHT-ALL-SPM).9. Inspect shim plate (10, figure 65-6) fordamage and wear.(Do0.0--l-6NOTEIf inspection reveals cracks ordistortion, gearbox case shall beconsidered unserviceable andnonrepairable.10. Inspect chip detector (17) for obviousdamage.NOTEr«00Overtemperature indicator dots ontemperature indicator "TEMP-PLATES" are of a white or light graycolor and turn black when exposedto an overtemperature condition.Chemical contamination can alsocause the indicating dots to turnblack.Imo11. Inspect outer couplings (13 and 28)temperature indicator "TEMP-PLATES" orevidence of overtemperature indication. Ifovertemperature indication is noted, performcoupling overtemperature inspection asfollows:L(0(LOa. Inspect outer coupling cadmium platingfor being discolored (circumferential tan orlight brown band) or blistered. If cadmiumplate discoloration or blistering is found,replace outer coupling and inner coupling.-(p0_a-DO4-+O.-Q'-ac-00i'-'"'U,_3(Qb. Inspect gear teeth of outer couplingand inner coupling for being discolored(brown or blue) in the normally bright contactpatterns. If discoloration is found, replaceouter coupling and inner coupling.C. Inspect outer coupling and innercoupling under 5x to 10x magnification forteeth exhibiting signs of metal smearing ortearing in the contact patterns. If smearing ortearing is found, replace outer coupling andinner coupling.d. Inspect grease from couplings forbeing very viscous (thick) and having a strongpungent odor. If grease is found to be viscous(thick) and having a strong pungent odor,replace outer coupling and inner coupling.NOTEIf "TEMP-PLATES" are to bereplaced, replace "TEMP-PLATES"after completing entire inspectionand procedures and couplings havebeen determined serviceable andprior to assembly.12. Inspect outer couplings (13 and 28)temperature indicator "TEMP-PLATES" fordeterioration, debonding or discoloration ofepoxy coating that prevents interpretation ofindicating dots. If deterioration, debonding, ordiscoloration of epoxy is found, replace"TEMP-PLATES" in accordance withparagraph 65-9A.poi65-00-00Rev.4 Page 18A/1813