According to Part-FCL, in order to revalidate a single engine piston (SEP) class rating there are two options:

• Pass a proficiency check within the last 3 months of its validity, or
• Complete 12 hours of flight within the last 12 months of its validity, including 6 hours as PIC, as well as 12 take-offs and 12 landings AND a refresher training with an instructor of at least 1 hour.

FCL.740.A Revalidation of class and type ratings — aeroplanes

(b) Revalidation of single-pilot single-engine class ratings.

(1) Single-engine piston aeroplane class ratings and TMG ratings. For revalidation of single pilot single-engine piston aeroplane class ratings or TMG class ratings the applicant shall:

(i) within the 3 months preceding the expiry date of the rating, pass a proficiency check in the relevant class in accordance with Appendix 9 to this Part with an examiner; or

(ii) within the 12 months preceding the expiry date of the rating, complete 12 hours of flight time in the relevant class, including:

— 6 hours as PIC,
— 12 take-offs and 12 landings, and
— refresher training of at least 1 hour of total flight time with a flight instructor (FI) or a class rating instructor (CRI). Applicants shall be exempted from this refresher training if they have passed a class or type rating proficiency check, skill test or assessment of competence in any other class or type of aeroplane.