Definition
The primary business location designated by an FAA-certificated operator, such as an air carrier, repair station, or flight school, as the central place from which its operations are managed and conducted. It is the address of record on the operator's certificate and is where the FAA expects to find the operator's required records, manuals, and accountable management personnel.
Plain English
The main business address an operator gives the FAA as its headquarters. It's the official 'home' location where the company is run from and where its records and key people are based.
Context Anchor
Seen in FAA certification paperwork, company records, and inspections for aviation businesses such as charter operators, flight schools, and repair stations.
Derivation
From 'principal' (Latin princeps, meaning 'first' or 'chief'), 'base' (a foundation or main location), and 'operations' (the activities of the business). Together: the chief location from which operations are run.
Why Pilots Care
It determines where maintenance records, crew records, and regulatory oversight are centered, directly affecting compliance and operational control.
Intuition Check
Do not read “principal” as a person, such as a school principal. Here it means “main” or “primary,” as in the chief place where the operation is based.
Example Sentence 1
The charter company listed Teterboro as its principal base of operations on its Part 135 certificate.
Example Sentence 2
All aircraft maintenance logs must be kept at the principal base of operations for FAA inspection.