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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.
| Attributes | |
| ACN | 1243628 |
| Time | |
| Date | 201502 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Gulfstream G100/G150 (IAI 1125 Astra) |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Descent |
| Route In Use | Visual Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Turbine Engine |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor |
| Experience | Flight Crew Last 90 Days 56 Flight Crew Total 6420 Flight Crew Type 480 |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 25 Flight Crew Total 19157 Flight Crew Type 95 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
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.
Original NASA ASRS Text
Title: 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.
Narrative: 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.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.