In May 1937, series production of the Potez 630 commenced. Manufacturing work on the aircraft's various sections and components was shared out across various SNCAN facilities; the fuselage and tailplanes were produced in Caudebec-en-Caux, Normandy, the wings were made at Le Havre, Normandy, and final assembly was initially performed at Méaulte; the assembly work was later transferred to Les Mureaux. In February 1938, the first production Potez 630 conducted its maiden flight; on 23 February, the French Air Force accepted their first production 630 aircraft. Early on, production of the Potez 630 was hit by considerable delays, caused by a shortage of engines, propellers, and cannons; the first batch of Potez 630s were armed with four machine guns instead of the two 20 mm Hispano-Suiza cannons. On 2 August 1938, the first Potez 631 was officially accepted.