Gulfstream G100/G150 (IAI 1125 Astra)
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Flight Instructor
Flight Crew Last 90 Days 56; Flight Crew Total 6420; Flight Crew Type 480
Aircraft Equipment Problem Critical
Flight Crew Overcame Equipment Problem
Aircraft
Upon initiating our descent from FL400 to land; we felt a vibration originating from the aft portion of the aircraft. We also noted a rise in interstage turbine temperature and a higher than normal vibration indication of the #2 engine on the vibration meter. Thrust was reduced on the affected engine and temperatures returned to a normal range. At no time was power lost from the affected engine. We were cleared for a visual approach and landed without incident. Upon shutdown; we conducted a visual inspection of the #2 (right) engine and discovered an N2 Low Pressure Turbine blade had departed the engine through the exhaust pipe. We immediately notified our Director of Maintenance.
[Report narrative contained no additional information].
G100 flight crew reported feeling a vibration and noting a rise in interstage turbine temperature in #2 engine during descent. Reducing thrust brought temperature back to normal; and flight landed safely. After parking; flight crew noted that there was significant damage to the engine.