You Do Need power plug adapter while traveling from Trinidad & Tobago to American Samoa.

Here is Why You Need An Adapter

The outlet and plug type used in American Samoa are A, B, F and I and in Trinidad & Tobago are A and B. This is how they look like.

Trinidad & Tobago

In Trinidad & Tobago, outlets of type A and B are in use.

Type A

Type B

American Samoa

In American Samoa, outlets of type A, B, F and I are in use.

Type A

Type B

Type F

Type I