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Thousands of airplanes are grounded due to the travel restrictions amidst the global virus outbreak and it presents a new challenge for the airline operators around the world as they work hard to maintain their grounded planes serviceable when needed.

Roughly, more than 16,000 passenger jets are currently grounded across the world. The number stands for 62% of all active commercial planes. Finding the right space and conditions keeping them airworthy has suddenly become the highest priority for aircraft owners.

Aircraft can’t simply be left to the parking spaces like cars. They need plenty of work and attention while in storage, from the maintenance of hydraulics and flight-control systems for the protection against insects and wildlife such as nesting birds.

Then there’s humidity, which can corrode parts and damage interiors. Even when parked on runways, planes are often loaded with fuel to keep them from rocking in the wind and to ensure tanks stay lubricated.

“Nobody thought this magnitude of preservation would need to be done,”

said Anand Bhaskar, chief executive officer of New Delhi-based Air Works, a plane repair and maintenance company.

“Parking space is a problem. These are logistical nightmares that we’re trying to work around.”

The number of passenger jets in service is the lowest in 26 years. Managing such large-scale storage is a challenge for an industry already in crisis, with airlines worldwide slashing capacity to close to zero or not flying at all. The International Air Transport Association has warned that revenue from flying passengers could drop by more than $300 billion this year and that 25 million jobs are at risk.

Airlines are hunting for space on the ground at airports or in longer-term storage facilities in arid places such as the Australian outback and the Mojave Desert in the United States. At Amsterdam Airport Schiphol, KLM Group has more than 200 aircraft at the gates and on a runway, arranged according to size and type, and ensuring enough space for them to be towed if maintenance is required, according to a post on the company’s website.

“Schiphol is packed,” KLM manager Annemiek Cornielje wrote in an email. “Not with passengers, unfortunately, but with the many aircraft parked on the ramp and even on a runway. Choreographing this sad and unique sight is quite a parking-puzzle,” she said, adding that Schiphol isn’t charging parking fees.

Charges differ from airport to airport. In India, parking alone can cost $1,000 a day for a large aircraft, according to Mark Martin, founder of Dubai-based Martin Consulting. For an airline with a fleet of more than 250 jets, even heavily discounted rates may mean expenses of $12.5 million for a six-month grounding, without taking into account maintenance costs, he said.

In its online magazine, IATA said it asked governments to cut parking fees, which usually account for less than 2% of airport revenue in a normal year. Under current circumstances, those charges could “make-or-break” some airlines, it said.

Abu Dhabi-based Etihad Airways said its engineers are working around the clock maintaining its grounded fleet, a process that includes running engines and powering up aircraft, checking flight controls, and covering sensors and engines to protect the inner workings from sand and dust. About 200 staff per shift clean plane cabins in hangars, from replacing seat covers to shampooing carpets, according to a video on the airline’s official Twitter account.

“I’ve never seen anything like this before in my aviation career,”

said Gary Byrne, Etihad’s head of technical operations.

"The aircraft are very intricate, complex pieces of machinery - it’s not like parking a car.”

Tires also need attention. Qantas said all planes from Boeing 737s to Airbus A380s need to have their wheels rotated - by being towed on the tarmac or jacked into the air to be spun - every one to two weeks, while the hydraulic fluid is put on the landing gear to protect against rust.
Giant silica moisture absorption sachets are also put inside engines to keep them dry, while all external holes on the fuselage are covered to block insects and nesting birds.

Qantas said it has more than 200 aircraft, including Jetstar’s Boeing 787 Dreamliners, parked at airports around Australia. The country’s climate makes it more suited for storage, especially compared with much of Asia, which has high levels of humidity as well as the threat of typhoons. Near Alice Springs in the Northern Territory, Asia Pacific Aircraft Storage Pty is holding aircraft for the likes of Singapore Airlines and Fiji Airways.
The storage firm is expanding capacity to about 70 aircraft and considering raising that to more than 100, according to Managing Director Tom Vincent.

“There is a scramble for proper storage facilities,”

he said.

“We have a large number of deliveries over the next coming weeks and months.”

The Asia-Pacific has been a rapidly growing aviation market, with a slew of budget carriers from Indonesia, Vietnam, Malaysia, India and elsewhere ordering thousands of planes, buoyed by an emerging middle class embracing flying. That expansion came to a screeching halt because of the coronavirus, which has also hit orders for manufacturing giants Boeing and Airbus.

Finnair has parked aircraft at its Helsinki hub and has capacity if needed to use airports in Tampere and Rovaniemi, the capital of Lapland province. Work includes reconnecting aircraft batteries every 14 days, the airline said on its website. One a month, a more extensive check is carried out that involves removing protective covers, starting engines and inspecting air-conditioning and anti-ice systems.

One big challenge with parked planes is brakes, which can fade within 24 hours, according to the Finnair Vice President of Ground Operations Jukka Glader. Each of its jets requires 10 to 12 chocks behind the wheels to keep them in position. With so many aircraft grounded, Finnair ordered 500 wooden “corona chocks” from a local carpentry shop.

British Airways has parked half of its fleet of 12 Airbus A380 superjumbos in Chateauroux, France, for longer storage. Tarmac Aerosave, which has storage sites in France and Spain, is working to handle higher volumes of requests, while ComAv LLC is also experiencing increased demand for its facility at the Southern California Logistics Airport in Victorville, northeast of Los Angeles.

At crowded airports like in New Delhi, which doesn’t have spare parking spots, a runway has been converted into a temporary storage area, like at Schiphol.

“Whether it’s the multiple control surfaces or avionics or hydraulic systems, prolonged storage effectively means an impact to airworthiness,”

said Satyendra Pandey, an independent consultant and former head of strategy at Go Airlines India Ltd.

“Long-term storage is a specialized skill and ideal in dry and hot environments. This aspect will have to be revisited as currently airplanes are parked at airports and runways across the globe.”

Among other carriers, United Airlines expects to park about 400 aircraft, mostly at its hubs like Newark and Chicago, a spokeswoman said, while Delta Air Lines has sent planes to Pinal Airpark near Tucson, Arizona. American Airlines is using a maintenance base in Tulsa, Oklahoma, and facilities elsewhere.
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