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A regional jet right engine lost 12% N1 in 3 minutes while in cruise at FL300. An emergency was declared followed by a diversion to a nearby airport.
| Attributes | |
| ACN | 817981 |
| Time | |
| Date | 200812 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 30000 |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport High Wing 2 Turboprop Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial |
| ASRS Report | 817981 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : n1 indicator other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : diverted to alternate flight crew : landed in emergency condition |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
We were at cruise altitude FL300 when the captain noticed that the right engine was losing N1 power. So he pushed the right thrust lever up to maintain power. After about 2 minutes we have had to push the right thrust lever up about 2 knobs width to maintain equal power. The N1 was also fluctuating about 1-2% up and down. So we decided that we should not continue to ZZZ1 because we thought that we would end up shutting down the right engine. So we asked for lower and direct to ZZZ. ATC responded with 'stand by.' so the captain said 'we would like to declare an emergency and request lower and go direct ZZZ.' so ATC then cleared us to 8000 ft and direct ZZZ. So I started flying and the captain talked to the flight attendant; dispatch; maintenance; and ran the checklists. We then continued to ZZZ and landed without any other problems. The event occurred because the N1 lost 12% in 3 minutes.
Original NASA ASRS Text
Title: A Regional Jet right engine lost 12% N1 in 3 minutes while in cruise at FL300. An emergency was declared followed by a diversion to a nearby airport.
Narrative: We were at cruise altitude FL300 when the Captain noticed that the right engine was losing N1 power. So he pushed the right thrust lever up to maintain power. After about 2 minutes we have had to push the right thrust lever up about 2 knobs width to maintain equal power. The N1 was also fluctuating about 1-2% up and down. So we decided that we should not continue to ZZZ1 because we thought that we would end up shutting down the right engine. So we asked for lower and direct to ZZZ. ATC responded with 'stand by.' So the Captain said 'We would like to declare an emergency and request lower and go direct ZZZ.' So ATC then cleared us to 8000 FT and direct ZZZ. So I started flying and the Captain talked to the Flight Attendant; Dispatch; Maintenance; and ran the checklists. We then continued to ZZZ and landed without any other problems. The event occurred because the N1 lost 12% in 3 minutes.
Data retrieved from NASA's ASRS site as of May 2009 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.