What was found
(CAN) DURING FIRST 100 HR INSPECTION, SPOTTED GAP, VISIBLE BOLT SHANK, BETWEEN AIRFRAME MOUNTED SPHERICAL BEARING AND F239-2, RT AFT LANDING GEAR STRUT ASSY. FURTHER INSPECTION REQUIRED REMOVING STRUT FAIRING, AND BONDED RAIN CAP TO GAIN ACCESS TO THE NUT. FOUND NAS1291-7 NUT CRACKED STRAIGHT THROUGH. THIS EVENT IS SOMEWHAT ADDRESSED BY RHC R66 SL-01, HOWEVER THAT LETTER DOES NOT MENTION NAS1291 SERIES NUTS. ADDITIONALLY, THE NUT IS NOT VISIBLE DURING ROUTINE INSPECTIONS, AS IT IS COVERED BY THE BONDED RAIN CAP. CHECKING THE HEAD OF THE BOLT CAN GIVE AN ERRONEOUS INDICATION OF TORQUE DUE TO THE WEIGHT OF THE ACFT.