The discussion becomes one of "Certificate Amendment", a process called "Continuing Airworthiness" (lomapaseo). It is arguably sufficient, but recent events have brought its weaknesses to the fore. We are treated to Press (RR) that certifies that the engine had no unmitigable problems in test, and was worhty of commercial service. That will out as a downright lie, not anything covered under "we'll fix that later". The Locomotive is stuck full throttle, and the bridge is out.