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C170 pilot experiences rough running and low power output from his engine during descent. When smoke appears from the cowl the engine is shut down and a gliding approach and landing at destination ensues.
| Attributes | |
| ACN | 845962 |
| Time | |
| Date | 200907 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Cessna 170 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Flight Plan | VFR |
| Component | |
| Aircraft Component | Engine |
| Person 1 | |
| Function | Single Pilot Pilot Flying |
| Qualification | Flight Crew Flight Instructor Flight Crew Commercial |
| Experience | Flight Crew Last 90 Days 250 Flight Crew Total 1750 Flight Crew Type 70 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor |
Narrative:
Prior to departure oil in the C-145 engine showed just below 4 qt. Experienced normal cruise at 6500' MSL on a clear VFR day. Approx 8-10 nm north of planned fuel stop; applied carb heat and began descent. During descent; engine failed to produce expected power. Throttle and mixture adjustments could only produce about 2200 RPM at 120 mph IAS in a descent. I adjusted glide profile to make the airport and kept the power as high as it would go. After a few minutes; engine power continued to decrease and engine started running rough. I saw a small amount of gray smoke coming from the cowling and elected to shut the motor down. After doing so; the engine stopped smoking and I landed without any further problems. After opening the cowling; I observed some damage to the shroud above the engine and a lot of oil had leaked onto the cowling below the motor. I expect oil starvation was the cause. The motor has about 1600 of 1800 hours; but the last overhaul was over 2 decades ago.
Original NASA ASRS Text
Title: C170 pilot experiences rough running and low power output from his engine during descent. When smoke appears from the cowl the engine is shut down and a gliding approach and landing at destination ensues.
Narrative: Prior to departure oil in the C-145 engine showed just below 4 qt. Experienced normal cruise at 6500' MSL on a clear VFR day. Approx 8-10 nm North of planned fuel stop; applied carb heat and began descent. During descent; engine failed to produce expected power. Throttle and mixture adjustments could only produce about 2200 RPM at 120 mph IAS in a descent. I adjusted glide profile to make the airport and kept the power as high as it would go. After a few minutes; engine power continued to decrease and engine started running rough. I saw a small amount of gray smoke coming from the cowling and elected to shut the motor down. After doing so; the engine stopped smoking and I landed without any further problems. After opening the cowling; I observed some damage to the shroud above the engine and a lot of oil had leaked onto the cowling below the motor. I expect oil starvation was the cause. The motor has about 1600 of 1800 hours; but the last overhaul was over 2 decades ago.
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.