Under which circumstances Appellate court will not have same powers as that of trial court?

[Educator]

The appeal is considered to be an extension of the suit because under Section 107 of the Code of Civil Procedure, the appellate court has the same powers as are conferred by the Code on courts of original jurisdiction in respect of suits instituted therein. Such a power can be exercised by the appellate court "as nearly as may be" exercised by the trial court under the Code. If the powers