No. And with respect to going on mil leave during training, that's bad juju. Claim a hardship exemption with your unit if that was the case.

(f) Adding a multiengine class rating or airplane type rating to an airline transport pilot certificate with a single engine class rating. A person applying to add a multiengine class rating or airplane type rating to an airline transport pilot certificate with an airplane category single engine class rating must—

(1) Meet the eligibility requirements of §61.153;

(2) After July 31, 2014, pass a required knowledge test on the aeronautical knowledge areas of §61.155(c), as applicable to multiengine airplanes;

(3) Comply with the requirements in §61.157(b), if applicable;

(4) Meet the applicable aeronautical experience requirements of §61.159; and

(5) Pass a practical test on the areas of operation of §61.157(e)(2).