Definition
Written and signed statements made by a certificated flight or ground instructor in a student's logbook or training record, certifying that the student has received specific instruction or met specific requirements set out in the Federal Aviation Regulations. Endorsements are required before a student may take certain actions, such as conducting a solo flight, taking a knowledge test, or applying for a practical test.
Plain English
A short, signed note from your instructor in your logbook that says, 'I've taught this student the required things, and I'm certifying they're ready for the next step.' Without the right endorsement, you legally can't solo, take the written test, or sit for the checkride.
Context Anchor
You see instructor endorsements in logbooks, student pilot records, and FAA training requirements when an instructor signs off a student for solo flight, tests, or specific training tasks.
Derivation
Endorse' comes from the Latin 'in dorso,' meaning 'on the back' -- originally referring to writing a signature or note on the back of a document. In aviation, the instructor literally writes and signs a statement in the student's logbook, putting their name and certificate behind the student's readiness.
Why Pilots Care
Endorsements are legally required before a student may perform certain flights; flying without the proper endorsement violates regulations and can ground the student or instructor.
Intuition Check
An instructor endorsement is not just a compliment or casual approval. In FAA use, it is a specific written sign-off from an authorized instructor for a stated training requirement, test, or flight privilege.
Example Sentence 1
Before her first solo, the instructor reviewed her preflight knowledge, then wrote and signed the solo endorsement in her logbook.
Example Sentence 2
Additional instructor endorsements were needed before the student could begin night cross-country training.