NoD/Triplebravo,
Please forgive/correct me if I am wrong but I thought that the certification basis for all types takes no account of the contribution of reverse thrust in the calculation of landing roll distance required.
You are correct. We've mentioned that around pages 48,49 (many of us) that by CFR 14 Part 25, part 121 NO TR IS ACCOUNTED FOR CERTIFIED LANDING.
NoD,
NO, for wet there is no account of TRs in any certification documentation. OEM recommendations, QRHs etc withstanding.
Only Part 25/121 are official.
Cheers