Photo: Stephen Brashear via Getty Images

In the wake of a Lion Air crash that left 189 people dead off the coast of Indonesia last week, Boeing has issued a bulletin to airlines warning that erroneous readings by a key sensor could cause 737 MAX airplanes to suddenly nosedive, reports Bloomberg.

Why it matters: Per Axios science editor Andrew Freedman, the Lion Air crash is the first to involve the 737 MAX, which is a more powerful and efficient version of the popular 737. The aircraft is used on trans-Atlantic routes, and more than 4,700 are on order worldwide, Boeing says on its website. The Federal Aviation Administration plans to issue a directive requiring pilots to follow Boeing's safety bulletin, per Reuters.

The details: The preliminary findings of the Lion Air investigation have focused on erroneous input from one of the plane's angle of attack indicators. Such indicators feed instruments and pilots information about whether the nose is pointed up or down, and by how much. Erroneous readings could cause the plane's computers to detect an impending stall, or loss of lift, and force the nose down, overriding the pilot's inputs.

Boeing has sent 737-MAX operators instructions on how to control the plane in the event this should occur.

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In photos: Thousands evacuated as Southern California fire grows

A plane makes a retardant drop on a ridge at the Apple Fire north of Banning in Riverside County, which "doubled in size" Saturday, per KTLA. Robert Gauthier / Los Angeles Times via Getty Images

A massive wildfire that prompted mandatory evacuations in Southern California over the weekend burned 26,450 acres and was 5% contained by Monday afternoon, the California Department of Forestry and Fire Protection said.

The big picture: As California remains an epicenter of the coronavirus pandemic in the U.S., some 15 separate fires are raging across the state. About 7,800 people were under evacuation orders from the Apple Fire, about 75 miles east of Los Angeles, as hundreds of firefighters battled the blaze. CalFire said Monday that a malfunction involving a "diesel-fueled vehicle emitting burning carbon from the exhaust system" started the Apple Fire.

Updated 1 hour ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 7 p.m. ET: 18,178,736 — Total deaths: 691,111 — Total recoveries — 10,835,789Map.
  2. U.S.: Total confirmed cases as of 7 p.m. ET: 4,698,335 — Total deaths: 155,331 — Total recoveries: 1,468,689 — Total tests: 57,543,852Map.
  3. Politics: White House will require staff to undergo randomized coronavirus testing — Pelosi says Birx "enabled" Trump on misinformation.
  4. Sports: 13 members of St. Louis Cardinals test positive, prompting MLB to cancel Tigers series — Former FDA chief says MLB outbreaks should be warning sign for schools.
  5. 1 🎥 thing: "Tenet" may be the first major film to get a global pandemic release.

Twitter faces FTC fine of up to $250 million over alleged privacy violations

Photo: Rafael Henrique/SOPA Images/LightRocket

The Federal Trade Commission has accused Twitter of using phone numbers and emails from its users to make targeted ads between 2013 and 2019, Twitter said in an SEC filing published Monday.

Why it matters: Twitter estimates that the FTC's draft complaint, which was sent a few days after its Q2 earnings report, could cost the company between $150 million and $250 million. The complaint is unrelated to the recent Twitter hack involving a bitcoin scam.