Pilots had reported pressurisation warnings on three earlier flights by the plane involved in a mid-air blowout, investigators have said.
Alaska Airlines was forced to perform an emergency landing on Friday after a door plug was torn offof the Boeing 737 MAX 9 plane flying 171 passengers from Portland in Oregon, to Ontario in California.
The incident happened after the auto-pressurisation fail light lit up on the same aircraft on 7 December last year and 3 and 4 January this year.
After those warnings, the airline chose to ban the aircraft from making long flights over water to Hawaii, in case it needed to turn back to an airport, the National Transportation Safety Board (NTSB) said.
But it is unclear if there is any connection between those incidents and the accident, NTSB chair Jennifer Homendy said.
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1:22
‘We are very, very fortunate’
She also described a harrowing picture of the incident, with the 27kg part blown off the side of the aircraft, causing rapid depressurisation inside the plane, which had not reached cruising altitude.
The force of the decompression led to the cockpit door being blown open while the flight crew could not communicate with the pilots.
“They heard a bang,” Ms Homendy said of the flight crew, adding a quick-reference laminated checklist was sucked out of the hole, while the first officer lost her headset.
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“Communication was a serious issue… it was described as chaos.”
The door plug – which filled the space where the hole was made – has now been recovered by a school teacher only named as Bob from Cedar Hills in Portland.
Door plugs are components that can fill plane doorways that are unused by airlines.
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There were also four unaccompanied minors on the flight, Ms Homendy said, with “heroic” flight attendants ensuring they had their oxygen masks on.
Missing voice recorder data
To compound communication issues, the cockpit voice recorder (CVR) had no data as it was not retrieved within two hours, when recording restarts and previous data is erased.
“It’s a very chaotic event, the circuit breaker for the CVR was not pulled, the maintenance team went out to get it, but it was right at about the two-hour mark,” Ms Homendy said.
“If that communication is not recorded, that is unfortunately a loss for us… that information is key not just for our investigation but for improving aviation safety.”
Image: A gaping hole could be seen in the side of the aircraft. Pic: Kyle Rinker
In response to the mid-air incident, the US Federal Aviation Administration (FAA) grounded 171 Boeing 737 MAX 9 planes to run inspections, which has caused cancellations to pile up for passengers. Other 737 MAX 9s have been grounded elsewhere.
Alaska Airlines said it cancelled 170 flights on Sunday and a further 60 on Monday, with more expected this week and other airlines also affected.
Reports were ‘fully evaluated’
Responding to the reports on the warning lights, Alaska Airlines said aircraft pressurisation system write-ups are typical in commercial aviation operations with large planes.
“In every case, the write up was fully evaluated and resolved per approved maintenance procedures and in full compliance with all applicable FAA regulations,” the airline said.
Ms Homendy had previously said it was “very lucky” the accident wasn’t far worse.
She revealed no one was sat in the seats immediately next to the affected part of the fuselage – and because the plane had not reached cruising altitude, passengers and crew were not moving around the cabin.
No one was injured, and the plane landed safely back in Portland.
Boeing stock dropped more than 8% in premarket trading on Monday following the groundings.
The ripping up of the trade rule book caused by President Trump’s tariffs will slow economic growth in some countries, but not cause a global recession, the International Monetary Fund (IMF) has said.
There will be “notable” markdowns to growth forecasts, according to the financial organisation’s managing director Kristalina Georgieva in her curtain raiser speech at the IMF’s spring meeting in Washington.
Some nations will also see higher inflation as a result of the taxes Mr Trump has placed on imports to the US. At the same time, the European Central Bank said it anticipated less inflation from tariffs.
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1:42
Trump’s tariffs: What you need to know
Earlier this month, a flat rate of 10% was placed on all imports, while additional levies from certain countries were paused for 90 days. Car parts, steel and aluminium are, however, still subject to a 25% tax when they arrive in the US.
This has meant the “reboot of the global trading system”, Ms Georgieva said. “Trade policy uncertainty is literally off the charts.”
The confusion over why nations were slapped with their specific tariffs, the stop-start nature of the taxes, and the rapid escalation of the tit-for-tat levies between the US and China sparked uncertainty and financial market turbulence.
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“The longer uncertainty persists, the larger the cost,” Ms Georgieva cautioned.
“Unusual” activity in currency and government debt markets – as investors sold off dollars and US government debt – “should be taken as a warning”, she added.
“Everyone suffers if financial conditions worsen.”
These challenges are being borne out from a “weaker starting position” as public debt levels are much higher in recent years due to spending during the COVID-19 pandemic and higher interest rates, which increased the cost of borrowing.
The trade tensions are “to a large extent” a result of “an erosion of trust”, Ms Georgieva said.
This erosion, coupled with jobs moving overseas, and concerns over national security and domestic production, has left us in a world where “industry gets more attention than the service sector” and “where national interests tower over global concerns,” she added.
But the high profits are not expected to increase, according to Sainsbury’s, which warned of heightened competition as a supermarket price war heats up.
Sainsbury’s said it had spent £1bn lowering prices, leading to a “record-breaking year in grocery”, its highest market share gain in more than a decade, as more people chose Sainsbury’s for their main shop.
It’s the second most popular supermarket with market share of ahead of Asda but below Tesco, according to latest industry figures from market research company Kantar.
In the same year, the supermarket announced plans to cut more than 3,000 jobs and the closure of its remaining 61 in-store cafes as well as hot food, patisserie, and pizza counters, to save money in a “challenging cost environment”.
This financial year, profits are forecast to be around £1bn again, in line with the £1.036bn in retail underlying operating profit announced today for the year ended in March.
The grocer has been a vocal critic of the government’s increase in employer national insurance contributions and said in January it would incur an additional £140m as a result of the hike.
Higher national insurance bills are not captured by the annual results published on Thursday, as they only took effect in April, outside of the 2024 to 2025 financial year.
Supermarkets gearing up for a price war and not bulking profits further could be good news for prices of shelves, according to online investment planner AJ Bell’s investment director Russ Mould.
“The main winners in a price war would ultimately be shoppers”, he said.
“Like Tesco, Sainsbury’s wants to equip itself to protect its competitive position, hence its guidance for flat profit in the coming year as it looks to offer customers value for money.”
There has been, however, a warning from Sainsbury’s that higher national insurance contributions will bring costs up for consumers.
News shops are planned in “key target locations”, Sainsbury’s results said, which, along with further openings, “provides a unique opportunity to drive further market share gains”.
US stock markets suffered more significant losses on Wednesday, with stocks in leading AI chipmakers slumping after firms said new restrictions on exports to China would cost them billions.
Nvidia fell 6.87% – and was at one point down 10% – after revealing it would now need a US government licence to sell its H20 chip.
Rival chipmaker AMD slumped 7.35% after it predicted a $800m (£604m) charge due to its MI308 also needing a licence.
Dutch firm ASML, which makes hardware essential to chip manufacturing, fell more than 5% after it missed order expectations and said US tariffs created uncertainty.
The losses filtered into the tech-dominated Nasdaq index, which recovered slightly to end 3% down, while the larger S&P 500 fell 2.2%.
Image: Pic: AP
Such losses would have been among the worst in years were it not for the turmoil over recent weeks.
It comes as China remains the focus of Donald Trump’s tariff regime, with both countries imposing tit-for-tat charges of over 100% on imports.
The US commerce department said in a statement it was “committed to acting on the president’s directive to safeguard our national and economic security”.
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Could Trump make a trade deal with UK?
Nvidia’s bespoke China chip is already deliberately less powerful than products sold elsewhere after intervention from the previous Biden administration.
However, the Trump government is worried the H20 and others could still be used to build a supercomputer in China, threatening national security and US dominance in AI.
Nvidia said the move would cost it around $5.5bn (£4.1bn) and the licensing requirement would be in place for the “indefinite future”.
Nvidia’s recently announced a $500bn (£378bn) investment to build infrastructure in America – something Mr Trump heralded as a victory in his mission to boost US manufacturing.
However, it appears to have been too little to stave off the new restrictions.
Pressure has also come from the Democrats, with senator Elizabeth Warren writing to the commerce secretary and urging him to limit chip sales to China.
Meanwhile, the head of US central bank also warned on Wednesday that US tariffs could slow the economy and raise inflation more than expected.
Jerome Powell said the bank would need more time to decide on lowering interest rates.
“The level of the tariff increases announced so far is significantly larger than anticipated,” he said.
“The same is likely to be true of the economic effects, which will include higher inflation and slower growth.”
Predictions of a recession in the US have risen significantly since the president revealed details of the import taxes a few weeks ago.
However, he subsequently paused the higher rates for 90 days to allow for negotiations.