Submitted by György Chityil ... on Fri, 01/19/2018 - 18:28 Hierarchy: NounDescription: {{aviation}} An instructor's signed acknowledgement of time practising specific flying skills.Ngram: endorsementNgram Text: endorsementSource: WiktionaryIssue: 0Wiktionary tag: aviationNgram Count: 1Wikokit WikiText ID: 584546