Abstract: The method of locating in situ a damaged vane in a front stage of stator vanes of a jet engine, the engine also containing a stage of rotor blades and a rear stage of stator vanes, the rotor blade stage located between the front and rear stator vane stages, the engine including a housing about said stages, the method employing a radiation passing cable having a probe end, said method including:(a) inserting the probe end of the cable through the housing and between vanes in said rear stage,(b) extending said probe end of the cable beyond said rear stage and toward blades of said rotor blade stage,(c) attaching the probe end of the cable to one of the rotor blades,(d) rotating said rotor to carry said probe end of the cable relatively past successive vanes in said front stage while maintaining said probe end directed toward the locus of said vanes in said rear stage so that said front stage vanes are successively brought into the field of view of said probe end, and(e) remotely viewing said successive vanes of