5.3 The filing date changes 

If the applicant files missing parts of the description or missing drawings in accordance with the procedure specified in A‑II, 5.1 or A-II, 5.2, then the filing date changes to the date on which the missing parts are received at the EPO. The applicant is informed of the new filing date. This is subject to the exception explained in A‑II, 5.4.

A "drawing" means a single numbered figure. Only whole figures are accepted according to Rule 56, even where only a part of the original figure was missing.