Sky DutyThe short definition
A flight department is the group of people and processes a company or individual uses to run its own aircraft — most often a corporate or private operation flying under Part 91. It is the aviation function inside a larger organization: the pilots who fly the aircraft, the people who schedule and dispatch the trips, the maintenance that keeps the fleet airworthy, and the records and budgets that hold it all together. A flight department can be one owner-pilot with a single aircraft or a professional team operating several, but the job is the same shape: get the right aircraft, with a current crew and a legal, airworthy airplane, to the right place at the right time.
The phrase describes the operation, not a specific certificate. Most corporate flight departments fly under Part 91 — a company operating its own aircraft for its own business, not for hire. Where the flying crosses into carrying people or property for compensation, the rules change; see Part 91 vs Part 135 for that line.
The roles inside a flight department
A larger flight department separates a handful of distinct roles; a small one may see a single person wear several hats. The common roles are:
Owner or aviation manager. The person or entity the aircraft exists to serve, and whoever holds budget and accountability for the operation — an owner-operator in a small shop, or an aviation department head in a larger one.
Director of aviation or chief pilot. The person responsible for how the flying is run — standards, crew, currency, and the safe conduct of trips. In a one- or two-pilot department this is often the same person who flies the trips.
Dispatcher or scheduler. The person who builds the schedule, assigns crew and aircraft to trips, watches for conflicts, and keeps everyone looking at the same plan.
Pilots (PIC and SIC). The crew who fly the aircraft — a pilot in command, and a second in command where the operation or aircraft calls for one.
Mechanic or maintenance. The person or shop that keeps the fleet airworthy — tracking inspections, resolving squawks, and keeping maintenance records current, whether in-house or contracted.
Sky Duty is built around this same role model. It ships built-in roles — owner, admin, dispatcher, PIC, SIC, and mechanic — with a custom permission matrix, so each person sees the slice of the operation that fits their job, from the owner down to the line pilot or a maintenance vendor.
Part 91, Part 91K, and charter management
Flight departments run in a few different regulatory contexts, and it helps to know which one an operation sits in.
Part 91. The most common context for a corporate or private flight department: a company or individual operates its own aircraft for its own purposes, not for compensation or hire. This is the general operating and flight rules baseline.
Part 91 Subpart K (91K). The rules for fractional ownership programs, where several owners share aircraft and a management company provides management services. It is still Part 91 flying, but Subpart K adds its own program requirements on top of the baseline.
Charter management. Some owners hand day-to-day operation to a management company, which may place the aircraft on its Part 135 certificate so it can be chartered when the owner is not using it. That mixes private (Part 91) and commercial (Part 135) flying on the same airframe, which is why the operating rules for a given leg depend on how that leg is being flown.
These are overviews, not determinations. Which rules apply to a specific operation or flight is a question for the FAA and your Flight Standards office, and the details matter.
What running a flight department involves
Day to day, running a flight department comes down to a handful of jobs that repeat on every trip:
Scheduling. Deciding which aircraft flies which trip, assigning crew, and catching conflicts before they cost a trip — the coordination job at the center of the operation.
Maintenance. Keeping the fleet airworthy — tracking inspections against the calendar and hours, resolving squawks, and knowing what is due, overdue, or grounded before it goes on the schedule.
Records. Logging flight time, keeping the logbook and currency current, and holding the maintenance and trip history a department needs for its own planning, insurance, and reviews.
Cost. Capturing what each trip cost — fuel, FBO fees, and the rest — so the department can see and account for the true cost of the flying.
Many small departments run those four jobs across a whiteboard, a shared calendar, a maintenance spreadsheet, and a folder of receipts — tools that drift out of agreement the moment a trip changes.
Where Sky Duty fits
Sky Duty is flight department software built for exactly this operation: it puts scheduling, the logbook, maintenance, expenses, and crew roles in one offline-first iPhone and iPad app, so a small department runs from one place instead of four disconnected tools. It supports Part 91 and Part 135 operation types and the roles a real department uses. If you fly your own aircraft, the Part 91 operators overview shows how it is set up; when you are ready to compare tools, the buyer's guide to choosing flight department software walks through what to look for.
One boundary worth stating: Sky Duty is the ground operation, not an EFB, and its weather is for situational awareness, not an official briefing. It runs the department around the flying — it does not fly the aircraft or replace the app you fly with.
