Definition

No technical objection (NTO) is the generic term for advice provided by a Type Certificate (TC) holder who concurs with an operator's request for alleviation or variation from airworthiness or operational constraints contained in the aircraft's maintenance or operational data.

Description

No technical objections (NTO) are normally used in the context of the approval process of flight conditions for the likes of flight extensions and ferry flights.

An NTO is generally issued by the type certificate (TC) holder to support the ferry of an aircraft to a base where a certain defect can be rectified or to permit the extension of the due date for a scheduled task or activity. NTOs are not considered as "acceptable technical data" by airworthiness authorities who will not issue changes, repairs, flight permits, waivers, etc., based on NTO letters.