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A SR22 pilot flying at night and fatigued heard a momentary strange engine sound. Uncertain what it might indicate or lead to; an emergency was declared followed by a landing at a nearby airport. The aircraft's sounds returned to normal prior to landing.
| Attributes | |
| ACN | 843950 |
| Time | |
| Date | 200907 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | SR22 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Engine |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Commercial Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 2000 Flight Crew Total 4800 Flight Crew Type 725 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
While on vectors to ZZZ early this morning the cirrus SR22 engine 'shuddered.' being night; late and having been 'abused' by the weather I immediately declared an emergency. I wanted; in case things got serious; the ability to have priority handling. The event lasted no more than 2 full seconds. I had immediately reduced power - concerned it was a prop - or turbo issue. I inspected the systems. All engine parameters were 'in the green' and steady. At that point I was wondering if we had 'hit' a bird or something - but the even was not a hit - rather a shudder with loss of power. After assessing the engine was 'okay' I returned to cruise power and notified tower that everything was 'okay.' I told them I was unsure what had happened but everything on the plane was behaving normally. I made a close visual approach and landed without incident. We taxied to parking- I inspected the outside of the aircraft - checked the oil - and verified nothing was abnormal. We met with the 'fire rescue staff' who followed us from landing. I completed an incident report - and thanked them for being there. We added fuel 'to tabs' and continued without further incident.I believe it was the correct action - to declare the emergency. One is always'shy' to make more of a deal - yet had the aircraft had a problem - it was one less step I needed to worry about.
Original NASA ASRS Text
Title: A SR22 pilot flying at night and fatigued heard a momentary strange engine sound. Uncertain what it might indicate or lead to; an emergency was declared followed by a landing at a nearby airport. The aircraft's sounds returned to normal prior to landing.
Narrative: While on vectors to ZZZ early this morning the Cirrus SR22 engine 'shuddered.' Being night; late and having been 'abused' by the weather I immediately declared an emergency. I wanted; in case things got serious; the ability to have priority handling. The event lasted no more than 2 full seconds. I had immediately reduced power - concerned it was a prop - or turbo issue. I inspected the systems. All engine parameters were 'in the green' and steady. At that point I was wondering if we had 'hit' a bird or something - but the even was NOT a hit - rather a shudder with loss of power. After assessing the engine was 'okay' I returned to cruise power and notified Tower that everything was 'okay.' I told them I was unsure what had happened but everything on the plane was behaving normally. I made a close visual approach and landed without incident. We taxied to parking- I inspected the outside of the aircraft - checked the oil - and verified nothing was abnormal. We met with the 'fire rescue staff' who followed us from landing. I completed an incident report - and thanked them for being there. We added fuel 'to tabs' and continued without further incident.I believe it was the correct action - to declare the emergency. One is always'shy' to make more of a deal - yet had the aircraft had a problem - it was one less step I needed to worry about.
Data retrieved from NASA's ASRS site as of April 2012 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.