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C172 pilot reported experiencing a power loss during leaning at 5;000 feet on a hot humid day. As the aircraft descends power increases and the reporter is able to land safely. Carb ice is determined to be the likely cause.
| Attributes | |
| ACN | 1360194 |
| Time | |
| Date | 201605 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ORF.TRACON |
| State Reference | VA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Climb |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Reciprocating Engine Assembly |
| Person 1 | |
| Function | Single Pilot Pilot Flying |
| Qualification | Flight Crew Private Flight Crew Multiengine Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 12 Flight Crew Total 1277 Flight Crew Type 1100 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
Departed phf & just finished climb to 5;000 feet over water; went to lean mixture & engine started running rough then lost power. Was a hot hazy day with ground temps above 90F; advised ATC; (note ATC was amazing in helping); while setting up a glide engine got partial power then slowly starting to develop full power. After landing & having a local mechanic check it out. It was determined it was carb ice. In the short time I was on the ground 5 pilots in the area stopped by & said they have experienced similar situations in that exact area. It seems that on hot hazy humid days over that water there is a greater reoccurrence of carb ice & it should be a warning or pilots should be made more aware this is an area of high carb ice.also after analyzing the engine analyzer after getting home; the number 2 cylinder went cold during mixture leaning & was an additional cause of power loss. This is a brand new engine with just over 200 hours. It's a penn yann 180 hp conversion; the plane is meticulously maintained & looked after. 200 hour engine should not be having a sticky valve.
Original NASA ASRS Text
Title: C172 pilot reported experiencing a power loss during leaning at 5;000 feet on a hot humid day. As the aircraft descends power increases and the reporter is able to land safely. Carb ice is determined to be the likely cause.
Narrative: Departed PHF & just finished climb to 5;000 feet over water; went to lean mixture & engine started running rough then lost power. Was a hot hazy day with ground temps above 90F; advised ATC; (note ATC was amazing in helping); while setting up a glide engine got partial power then slowly starting to develop full power. After landing & having a local mechanic check it out. It was determined it was carb ice. In the short time I was on the ground 5 pilots in the area stopped by & said they have experienced similar situations in that exact area. It seems that on hot hazy humid days over that water there is a greater reoccurrence of carb ice & it should be a warning or pilots should be made more aware this is an area of high carb ice.Also after analyzing the engine analyzer after getting home; the number 2 cylinder went cold during mixture leaning & was an additional cause of power loss. This is a brand new engine with just over 200 hours. It's a Penn Yann 180 HP conversion; the plane is meticulously maintained & looked after. 200 hour engine should not be having a sticky valve.
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.