B777 Undifferentiated or Other Model
Maintenance Airframe; Maintenance Powerplant
Maintenance Inspector 1; Maintenance Technician 24
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Aircraft; Procedure
This report is for a PW4000-4077 fan exit guide vane assembly. The fan cowl section was removed due to fan exit guide vane inner ring damage. The ring had a hole with multiple cracks emanating from it. Upon removal of the assembly and the disassembly of the vanes; it was discovered that the damage was caused by a broken guide vane attach pin/bolt. It was also revealed that all of the guide vane attach pin/bolts were severely worn.
Inspector reported damage to the Engine Fan Exit Guide Vane Assembly that was beyond repair; resulting in the assembly being scrapped.