I don't recall Piper Warriors being approved for intentional spins except for the Cherokee series with the slab wing. Even then I don't recall it was approved for intentional spins with flap extended. Unless it's approved differently in the UK? What does the a/c's flight manual specify?
Gerhardt, the Warrior is NOT spin resistant! It has never been tested & certified as such in its development. There are very few a/c that have been certifed as spin resistant. Just like the C152, the Warrior was required to demonstrate spin recovery ability during its certification.