Premier 1
Maintenance Airframe; Maintenance Powerplant
Training / Qualification; Troubleshooting; Workload
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Aircraft
Company service center notified of hydraulic seal failure on Aircraft X.Company mobile service unit began addressing/performing maintenance; determining a filter seal located on the hydraulic power unit had failed.Company mobile service provider/mechanic; after assembling the aircraft hydraulic unit prior to test running on Date company Mechanic notices he had left to aircraft generator in on position overnight causing aircraft main battery to result in insufficient voltage to power aircraft. GPU was then used for unknown attempts for starting right engine. Starting sequence for Aircraft X is 2 attempts then 2 hour for cooling prior a third attempt.On Date; mechanic reports right engine N2 only spoiling up to 24% N2 after inducing fuel.Company ask company Mechanic to perform a boroscope to the right engine.The boroscope that company performed indicated that the #2 turbine was missing fins to the internal component.On Date; company 2 determined that the engine was to be removed and sent to manufacturer for repair.
Technician discovered a missing turbine blade when boroscoping an engine for slow to spool up on start.