I saw that reg. The owner still would have to file the de-registration upon destruction/not airworthy/sold, etc.
(a) Each Certificate of Aircraft Registration, AC Form 8050-3, issued by the FAA under this subpart is effective, unless registration has ended by reason of having been revoked, canceled, expired, or the ownership is transferred, until the date upon which one of the following events occurs:
(1) Subject to the Convention on the International Recognition of Rights in Aircraft when applicable, the aircraft is registered under the laws of a foreign country.
(2) The aircraft is totally destroyed or scrapped.
No mention of filing for de=registration. Is this requirement specified elsewhere?