C150 student pilot reported that upon reaching cruise altitude the engine lost power and began to de...

Attributes
ACN	1410886
Time
Date	201612
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Flight Plan	None
Component
Aircraft Component	Carburetor
Person 1
Function	Trainee
Qualification	Flight Crew Student
Experience	Flight Crew Last 90 Days 0 Flight Crew Total 74 Flight Crew Type 74
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

Ceiling unlimited. Winds 4 kts out of the south. Visibility unlimited. Prior days were substantially below freezing with high moisture. At the time of the flight it was 42 degrees fahrenheit. We were heading out towards the training area northwest of ZZZ. The instructor contacted approach to request clearance to enter class B airspace. We were granted clearance with the request that we ascend to 3000 MSL. When reaching 3000 MSL; we lost engine efficiency and began to descend. After losing 500 feet of altitude; the instructor [advised ATC]. Reaching roughly 2000 AGL; we regained engine efficiency. We then successfully made our way back to ZZZ with routine check-ins from approach. The recovery at ZZZ was uneventful.

Original NASA ASRS Text

Title: C150 student pilot reported that upon reaching cruise altitude the engine lost power and began to descend. After a loss of 1000 feet; power was restored and the aircraft returned for landing.

Narrative: Ceiling unlimited. Winds 4 kts out of the south. Visibility unlimited. Prior days were substantially below freezing with high moisture. At the time of the flight it was 42 degrees Fahrenheit. We were heading out towards the training area northwest of ZZZ. The instructor contacted Approach to request clearance to enter class B airspace. We were granted clearance with the request that we ascend to 3000 MSL. When reaching 3000 MSL; we lost engine efficiency and began to descend. After losing 500 feet of altitude; the instructor [advised ATC]. Reaching roughly 2000 AGL; we regained engine efficiency. We then successfully made our way back to ZZZ with routine check-ins from Approach. The recovery at ZZZ was uneventful.

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.