DUBLIN, Jan 29 (Reuters) - The head of the world's largest aircraft lessor AerCap dismissed calls by some analysts for leadership changes at Boeing as unhelpful and said the planemaker is under no illusion about what needs to be done.

But AerCap Chief Executive Aengus Kelly told Reuters in an interview on Monday that everything that leaves Boeing factories "has to be spot on" and cautioned another incident would make the 737 MAX a "hard sell". (Reporting by Tim Hepher, writing by Padraic Halpin; editing by David Evans)