Under ICAO-regler , om Tyskland "validerar" din italienska licens då ja, du kan flyga det tyska flygplanet i andra länder:
Use of flight crew licences on foreign-registered aircraft
Any pilot who wishes to fly on an aircraft registered in a State other than the one that has issued the licence, needs to obtain an authorization from the State of Registry. This authorization is generally given by the State of Registry through a validation or a conversion of the foreign licence. In general, the validation process is used for short-term authorization while the conversion process is used for longer-term authorization.
Vad "validering" betyder här är upp till det land där flygplanet är registrerat. ICAO själv definierar inte vad de ska göra:
When a State validates a foreign licence, it recognizes it as valid for use on aircraft on its own registry. The Convention on International Civil Aviation and its Annex 1 do not contain specific requirements for the validation of licences beyond establishing the principle and the fact that the validity of a validation, cannot be extended beyond the validity of the supporting licence.
I USA specifikt tillämpas dessa ICAO-regler i 14 CFR 61.3 (betona min):
(b) Required pilot certificate for operating a foreign-registered aircraft within the United States. No person may serve as a required pilot flight crewmember of a civil aircraft of foreign registry within the United States, unless—
(1) That person's pilot certificate or document issued under §61.29(e) is in that person's physical possession or readily accessible in the aircraft when exercising the privileges of that pilot certificate; and
(2) Has been issued in accordance with this part, or has been issued or validated by the country in which the aircraft is registered.
Praktiskt taget skulle jag säga att om du har något officiellt papper från tyska myndigheter som bekräftar att Du är auktoriserad att driva tyska flygplan - eller åtminstone detta tyska flygplan - då är du bra att gå. Papperet kan till och med vara onödigt när det gäller Tyskland, men om du planerar att flyga internationellt tror jag att de fler bitar av officiellt papper du har desto bättre.