, Britain
A regional airline at Manchester in 2001 made most of its money on the same few departures. The early flight out on a Tuesday morning, full of people who would come back on the Wednesday evening, at a fare nobody paying for themselves would ever have paid.
In the second week of September those bookings stopped, and then the cancellations started coming in for flights three and four weeks out.
The four aircraft were on operating leases. The rental fell due on the first of every month, in dollars, whether the aircraft flew or sat on the apron with the covers on.
The airspace closed, and then the traffic did not come back
The immediate event was straightforward and very short. On 11 September 2001 airspace over the United States was closed to civil aviation. Aircraft already crossing the Atlantic were turned back or put down in Canada. Transatlantic flying stopped for days, and traffic resumed only gradually over the following week under new restrictions.
A regional carrier flying domestic and short-haul European routes was not directly grounded for all of that time, and it hardly mattered, because the second effect was the one that lasted. People stopped booking. Corporate travel departments suspended non-essential trips within days, and by the time they lifted the suspension they had discovered a set of savings they were not in a hurry to give back.
The recovery took about two years. That is the figure to hold onto, because it is the difference between a shock a business can wait out and a shock that has to be traded through. Six weeks of bad trading is a cash problem. Two years of lower yields with the same fleet is a different business.
The insurance was withdrawn at a week's notice
The part of that autumn that surprised even people in the industry was the insurance.
Aviation policies carry war and allied perils cover, and that cover can be cancelled at seven days' notice. In the week after the attacks the notices went out. Third party war risk cover, the piece that matters because airports and lessors require it as a condition of operating at all, was withdrawn and then offered again at a far lower limit and a far higher price, with a surcharge applied per passenger carried.
No airline can fly without it. Governments across Europe, Britain included, issued temporary indemnities so that carriers could keep operating, and then renewed those indemnities repeatedly while the market settled. The surcharges, once they were on the ticket, mostly stayed.
For a small operator the lesson is uncomfortable and general: some of your costs are not negotiated with a supplier who wants your business. They are set by a market that can reprice at a week's notice, and there is no alternative provider to ring.
Security stopped being something you bought and became something you were
The second permanent cost was security. Screening was tightened, flight deck doors were reinforced, checked baggage screening was extended, staff numbers per departure went up and the time between arriving at the airport and boarding got longer.
Almost all of that lands on the airline as a fixed cost per departure, or as a charge from the airport, which amounts to the same thing. A cost per departure is brutal for a regional carrier, because a regional carrier makes its money by flying a small aircraft often. The cost that a long-haul operator spreads over three hundred seats once a day, a regional operator carries on seventy seats four times a day.
Longer airport processing did something subtler as well. A short domestic flight competes with the train and the car on total journey time. Add an hour to the airport end of it and some of those passengers do not come back to aviation at all, whatever the fare.
The leases are the whole argument
An operating lease is a fixed monthly rental for a fixed term. It usually carries maintenance reserves paid by the flying hour or cycle, and it always carries return conditions: the state the aircraft must be handed back in, which is expensive and which you pay for whether the aircraft has been earning or not.
Handing an aircraft back early is not a decision the airline can simply take. There is a termination sum, and the lessor's willingness to negotiate depends on what else it can do with the aircraft. In late 2001 the answer was nothing, because every operator in the northern hemisphere was trying to park capacity at once and aircraft values fell accordingly. A lessor with a queue of returns has no reason to be generous.
So the fleet is close to fixed in the short run, and the fixed costs that go with it are close to fixed too. Crews have to stay current, which means a minimum number of take-offs and landings inside a rolling period, so a grounded fleet still generates flying and still generates training. Slots at busy airports are held on a use-it-or-lose-it basis, and the rule was relaxed for a period after September 2001 precisely so that airlines were not forced to fly empty aircraft to keep them.
What is left to manage is the network and the cash. You can thin frequencies and keep the route, or drop the route and keep the aircraft busy elsewhere, or shrink to the routes that still fill and accept that you now have aircraft you are paying for and not using.
The regulator is watching the bank balance, not just the maintenance
An airline in Britain holds an operating licence, and the Civil Aviation Authority is entitled to satisfy itself that the holder remains financially fit to meet its obligations for a period ahead. That is not a formality in a downturn. It means the balance sheet is a licensing matter, and an airline that is visibly running out of money can face the loss of the permission it trades on before its creditors ever get to it.
It also interacts badly with the thing an airline is: a business that takes cash from passengers months before it carries them. Forward bookings are somebody else's money. An airline funding today's losses with next summer's ticket sales is doing something that works right up until the bookings slow, and in the autumn of 2001 they slowed everywhere at once.
Where this shows up in the game
The Week the Sky Closed is a historical start. You take a regional airline in Manchester in September 2001, with four aircraft on lease and six million pounds of borrowing somebody else agreed to, and you have eighteen months. It is one of the hard ones, and it is scored on survival: still trading at the end. The epilogue reports the load factor and the number of aircraft still on the certificate, which is how the trade would judge it rather than how a balance sheet would.
Demand falls by a step in month one and recovers slowly across the run, so there is no month in which things are suddenly fine again. Insurance and security costs rise permanently in month two. Aircraft lease payments are fixed and continue whether the aircraft fly or not, and handing one back early costs a termination sum. The authority's financial fitness test runs each quarter, which turns your cash balance into a licensing question as well as a trading one. The page for The Week the Sky Closed lists the rules and the failure conditions.
The seed is fixed at 600012, so every attempt meets the same autumn, the same bookings and the same lessors, and the runs can be compared. Ironman rules apply: one save, and what happens happens.