When should "Partial Power" procedures be initiated?

"Partial Power" procedures should be initiated when engine performance drops but some thrust remains. This situation indicates that the aircraft's engine is experiencing a malfunction that prevents it from delivering full power, but it is still operational to some extent. Initiating the "Partial Power" procedures allows the pilot to take appropriate actions to manage the aircraft's performance and ensure safety while addressing the engine issue.

This situation necessitates immediate attention because operating with diminished power can significantly affect the aircraft's performance, climb capability, and overall handling characteristics, making it critical to follow the correct emergency procedures.

The other scenarios mentioned do not typically warrant the "Partial Power" procedures. Regulatory check-ins, taxi operations, and fuel management considerations do not directly relate to engine performance issues that would require such emergency actions.