This post contains references to products from one or more of our advertisers. We may receive compensation when you click on links to those products. For an explanation of our Advertising Policy, visit this page.

Just over one week after Lion Air Flight 610, a Boeing 737 MAX aircraft, crashed off the coast of Indonesia, Boeing is expected to send a bulletin to operators of the aircraft that incorrect readings from its flight-monitoring system can cause the planes to aggressively dive, a person familiar with the matter told Bloomberg.

The warning that Boeing is reportedly gearing up to send to 737 MAX operators comes after preliminary findings from last week’s crash, said the person quoted by Bloomberg, who asked to remain anonymous as details are still confidential. The warning is expected to alert pilots to follow an existing procedure in case an issue arises. This warning could be released as early as Wednesday morning Jakarta time.

More specifically, the bulletin is expected to say that under certain circumstances, the aircraft will automatically push the nose of the plane downward if its angle-of-attack sensor detects that a stall is possible. The angle of attack is the angle at which air passes over the wings, and a stall is what happens when the flow of air over the wings is not enough to generate sufficient lift to keep an airplane flying. Pushing the nose down increases the airspeed, or the speed of the plane relative to the surrounding air, which produces more lift.

United
United’s 737 MAX 9 cabin.

It’s not yet clear at this point if the findings in the 737 MAX bulletin, expected to be announced by Boeing, explain what caused the Lion Air crash last week, which killed all 189 people on board. However, just before the aircraft — a Boeing 737 MAX 8 (brand new, with registration PK-LQP) — lost contact with air traffic control, the pilots requested to return to Jakarta about 12 miles after takeoff because of an erroneous airspeed indication. That same aircraft had inaccurate airspeed readings for days before its final flight.

Boeing could not be immediately reached for comment.

While many details of the bulletin remain unknown, it represents a major step for Boeing and its operators. In the US, several airlines operate Boeing 737 MAX aircraft of different variants. These include American Airlines, Southwest Airlines and United Airlines. Alaska Airlines also has an order for 32 737 MAX 9s, which have yet to be delivered. Worldwide, the MAX — the latest evolution of the workhorse 737, featuring new engines — is in service with many other carriers, after being introduced in 2017.

Featured image courtesy of Boeing.

The best beginner points and miles card out there.
Chase Sapphire Preferred® Card

With great travel benefits, 2x points on travel & dining and a 50,000 point sign up bonus, the Chase Sapphire Preferred is a great card for those looking to get into the points and miles game. Here are the top 5 reasons it should be in your wallet, or read our definitive review for more details.

Apply Now
More Things to Know
  • Earn 50,000 bonus points after you spend $4,000 on purchases in the first 3 months from account opening. That's $625 toward travel when you redeem through Chase Ultimate Rewards®
  • Chase Sapphire Preferred named "Best Credit Card for Flexible Travel Redemption" - Kiplinger's Personal Finance, June 2018
  • 2X points on travel and dining at restaurants worldwide & 1 point per dollar spent on all other purchases.
  • No foreign transaction fees
  • 1:1 point transfer to leading airline and hotel loyalty programs
  • Get 25% more value when you redeem for airfare, hotels, car rentals and cruises through Chase Ultimate Rewards. For example, 50,000 points are worth $625 toward travel
  • No blackout dates or travel restrictions - as long as there's a seat on the flight, you can book it through Chase Ultimate Rewards
Intro APR on Purchases
N/A
Regular APR
17.99% - 24.99% Variable
Annual Fee
$0 Intro for the First Year, then $95
Balance Transfer Fee
Either $5 or 5% of the amount of each transfer, whichever is greater.
Recommended Credit
Excellent Credit

Editorial Disclaimer: Opinions expressed here are the author’s alone, not those of any bank, credit card issuer, airlines or hotel chain, and have not been reviewed, approved or otherwise endorsed by any of these entities.

Disclaimer: The responses below are not provided or commissioned by the bank advertiser. Responses have not been reviewed, approved or otherwise endorsed by the bank advertiser. It is not the bank advertiser’s responsibility to ensure all posts and/or questions are answered.