Tail Rotor Driveshaft Hanger

0BHT-212-CR&010. Inspect sleeves (28, figure 65-17) forcorrosion as follows:0+-.(moo->,0a. Corrosion pitting or mechanical surfacedamage in area A, exclusive of spotface area,is acceptable for repair if within followinglimits (figure 65-20).E(DOEE,..r0)Yate.,-r>,c'.r(O..(1) Maximum acceptable depth is 0.030inch (0.762 mm).(2) No more than 40% of area withinany 1.0 square inch (25.4 sq mm), nor 20% oftotal area of any surface or diameter may bepitted.b. Corrosion pitting or mechanicalsurface damage on spotfaced surface atattaching holes is acceptable provided it iswithin the following limits:(1) Maximum acceptable depth is 0.020inch (0.508 mm).(2) No more than 20% of total spotfacedarea at any hole may be pitted.(3) No more than 20% of total areanormally contacted by washer may be pitted.(4) No more than 50% of width of areanormally contacted by washer may be pittedat any point around hole.11. Perform fluorescent penetrantof sleeve (BHT-ALL-SPM).,inspection12. Inspect shim plate (20, figure 65-17) fordamage and wear.13. Inspect plate (2) for damaged seals.14. Inspect oil collector cone (26) andsleeve (28) for damage.15. Inspect coupling retaining bolt (8)visually for damaged threads. Replace boltswhich have malformed threads.o-'16. Inspect nut (15) visually for damagedthreads. Replace nuts which have malformedthreads.65-00-00Page 48Rev.40 065-34. Repair.0)E (OnCMATERIALS REQUIREDRefer to BHT-ALL-SPM for specification andsource.NUMBERC-100C-103C-108C-114C-116C-201C-309C-317C-334C-500C-423C-434C-464cumNOMENCLATUREChemical Film MaterialChromic AcidBrush CadmiumPlating SolutionCorrosion TreatmentChromic AcidPrimerMethyl- Ethyl- Ketone(MEK)Adhesive1.1.1-TrichloroethaneCrocus ClothAbrasive Cloth orPaperTapeIndia Stonec1. Replace parts which exceed allowablewear limits.2. Replace bearings (17 and 22, figure 65-17) exhibiting evidence of brinelling, flaking,spalling, discoloration from overheating,corrosion on rolling elements, cracked orbroken retainers or do not operate smoothly.3. Replace all seals, packings, standardhardware, and all locking devices at time ofreassembly.4. Repair minor scratches, nicks, and pitson noncritical surfaces with abrasive cloth or Ipaper (C-423).5. Repair minor nicks, scratches, and burrson splines and gear (24) using India stone (C-464).