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Boeing's 737 Max bills include US$2,000 a month to park each grounded jet

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Grounded Southwest Airlines Boeing 737 MAX 8 aircraft are shown parked at Victorville Airport in Victorville, California, U.S., March 26, 2019. While regulators contemplate whether Boeing Co's 737 Max can safely return to the skies, workers in a California airplane-storage yard keep a careful vigil against earthier concerns.

[CHICAGO] While regulators contemplate whether Boeing Co's 737 Max can safely return to the skies, workers in a California airplane-storage yard keep a careful vigil against earthier concerns.

Crews have sealed 34 Southwest Airlines Co jets against the Mojave Desert's sun, wind and sand, as well as insects and birds that can creep into wheel wells and engine air inlets. Southwest declined to discuss the expense, but one industry veteran said such sojourns run about US$2,000 a month for each plane - a small but critical cost amid Boeing's many looming financial penalties.

The attention lavished now on the planes will help determine how fast the Max get back in the air once a worldwide grounding is lifted. Designed to ferry throngs of travelers, the young jets' only daily visitors these days are technicians who draw fuel samples to scout for bacterial contamination. Once a week, Southwest mechanics spool up the big turbofans, boot up flight computers, and extend and retract flight-control surfaces such as wing flaps.

"Planes are meant to be flying and being used,'' said Tim Zemanovic, who used to own an Arizona storage park and estimated monthly storage costs, which include labour and materials. "You've got to keep them that way even when they're in storage.''

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The constant care extends to almost 500 grounded Max planes around the world, a total that includes about 100 factory-fresh jets that can't be delivered to customers because of the flying ban, which began in March after the second deadly crash in five months. Managing aircraft upkeep on such a scale is unprecedented, as Boeing grapples with a crisis that has already lopped US$41.5 billion off its market value.

The maintenance costs are just the start of Boeing's financial exposure. The Chicago-based planemaker also faces an estimated US$1.4 billion bill for airlines' canceled flights and lost operating profit if the Max fleet is still grounded by the end of September, said Bloomberg Intelligence analyst George Ferguson.

Boeing's inventory could balloon by nearly US$12 billion by the end of September if regulators don't act and 737 production continues at the current pace, Mr Ferguson said.

"They can't keep building and parking planes indefinitely," he said. "We don't think it will get to that, but it's going to take a lot of cash to park those in the desert."

As Boeing finalises paperwork to certify a redesign of flight-control software linked to the two disasters, executives are laying detailed plans for the Max's eventual return to commercial flight. The team huddles daily and includes officials from the 737 programme, corporate headquarters and the commercial and global-services divisions.

The Max grounding has long since passed the 60-day mark when aircraft are typically placed in long-term storage. Bringing them back to life will now involve a rigorous review that can last weeks as compared to days for planes that are parked for less than two months.

As the global fleet starts to come back online, Boeing plans to set up a round-the-clock operations centre to support customers. Teams of mechanics, technicians and field-service representatives will fan out to assist airlines as their jets make the "transition from storage and preservation activities to operational flight," said Doug Alder, a Boeing spokesman.

Southwest, the largest Max operator, is already planning for the plane's return even though it's not clear if that is weeks or months away. "It will be a staggered-type return to service," said Gary Bjarke, director of contract services for the Dallas-based carrier.

Until then, Mr Bjarke leads the team overseeing the upkeep of Southwest's Max fleet parked on a desert plain in Victorville, California, east of Los Angeles. Southwest ferried all its Max planes to the storage yard in the days after US regulators halted commercial flights.

Crews spent about 80 man-hours preparing each jet for storage, and he estimates it will take about 120 hours of work to get each single-aisle plane back into flying condition. In all, he said, the maintenance checks could take about 30 days before the last of the airline's parked 737s rejoin daily operations.

The tempo of care is largely set by detailed checklists provided by Boeing. Instructions for "prolonged parking" run more than 100 pages in a manual for a previous generation of 737s. There are separate procedures to prepare planes depending on whether they will be parked a week, a month, two months and a year. Basic service tasks are spelled out in similar increments.

Even a simple requirement to wash an airplane is complicated by its sheer size. If a maintenance provider doesn't have a concrete pad wash area with a drain for waste water, there's another option: wipe the plane down by hand.

"Basically, use cleaning wipes," said Zemanovic, the former owner of the Arizona storage park.

The manual occasionally spells out risks in colorful detail, like the bacteria or fungi that can turn jet kerosene into the consistency of "mayonnaise," clogging the fuel system if water hasn't been thoroughly drained. There are separate lists that step-by-step make the plane serviceable once its desert stay comes to an end.

"They just don't park them and walk away and come back six months later," said Zemanovic, who now serves as president of Fillmore Aviation, a Minneapolis-based company that specializes in end-of-life aircraft care. "Someone's looking at them every day."

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