Breaking News
0
Ad-Free Version. Upgrade your Investing.com experience. Save up to 40% More details

Exclusive: Boeing faces new hurdle in 737 MAX electrical grounding issue - sources

Stock MarketsMay 05, 2021 12:35AM ET
Saved. See Saved Items.
This article has already been saved in your Saved Items
 
2/2 © Reuters. FILE PHOTO: The Boeing logo is pictured at the Latin American Business Aviation Conference & Exhibition fair (LABACE) at Congonhas Airport in Sao Paulo, Brazil August 14, 2018. REUTERS/Paulo Whitaker/File Photo 2/2

By Eric M. Johnson, David Shepardson and Tracy Rucinski

SEATTLE/WASHINGTON/CHICAGO (Reuters) - U.S. air safety officials have asked Boeing (NYSE:BA) Co to supply fresh analysis and documentation showing numerous 737 MAX subsystems would not be affected by electrical grounding issues first flagged in three areas of the jet in April, two people familiar with the matter told Reuters.

The extra analysis injects new uncertainty over the timing of when Boeing's best-selling jetliner would be cleared to fly by the U.S. Federal Aviation Administration (FAA).

The electrical problems have suspended nearly a quarter of its 737 MAX fleet.

U.S. airlines have said they expected Boeing to release the service bulletins as soon as this week that would allow them to make fixes and soon return the planes to service, but this latest issue will likely push that timelime back.

“We continue to work closely with the FAA and our customers to address the ground path issue in affected 737s,” a Boeing spokeswoman said.

Asked about the status of the planes, a FAA spokesman said "we are continuing to work with Boeing."

Airlines pulled dozens of 737 MAX jets from service early last month after Boeing warned of a production-related electrical grounding problem in a backup power control unit situated in the cockpit on some recently built airplanes.

The problem, which also halted delivery of new planes, was then found in two other places on the flight deck, including the storage rack where the affected control unit is kept and the instrument panel facing the pilots.

The glitch is the latest issue to beset the 737 MAX, which was grounded for nearly two years starting in 2019 after two fatal crashes.

The slog of questions over a relatively straightforward electrical issue illustrates the tougher regulatory posture facing America's largest exporter as it tries to emerge from the 737 MAX crisis and the overlapping coronavirus pandemic.

Late last week, Boeing submitted service bulletins advising airlines on how to fix the problems with grounding, or the electrical paths designed to maintain safety in the event of a surge of voltage, the two people said.

The FAA has approved the service bulletins but then, in ongoing discussions with Boeing, asked for additional analysis over whether other jet subsystems would be affected by the grounding issue, one of the sources said. The FAA will review Boeing's analysis and any necessary revisions to the service bulletins before they can be sent to airlines.

Boeing has proposed adding a bonding strap or cable that workers screw onto two different surfaces creating a grounding path, two people said.

Boeing had initially told airlines a fix could take hours or a few days per jet.

The electrical grounding issue emerged after Boeing changed a manufacturing method as it worked to speed up production of the jetliner, a third person said. A fourth person said the change improved a hole-drilling process.

The FAA issued a new airworthiness directive last week requiring a fix before the jets resume flight, saying the issue impacts 109 in-service planes worldwide. Sources said it impacts more than 300 planes in Boeing's inventory.

Exclusive: Boeing faces new hurdle in 737 MAX electrical grounding issue - sources
 

Related Articles

Add a Comment

Comment Guidelines

We encourage you to use comments to engage with users, share your perspective and ask questions of authors and each other. However, in order to maintain the high level of discourse we’ve all come to value and expect, please keep the following criteria in mind: 

  • Enrich the conversation
  • Stay focused and on track. Only post material that’s relevant to the topic being discussed.
  • Be respectful. Even negative opinions can be framed positively and diplomatically.
  •  Use standard writing style. Include punctuation and upper and lower cases.
  • NOTE: Spam and/or promotional messages and links within a comment will be removed
  • Avoid profanity, slander or personal attacks directed at an author or another user.
  • Don’t Monopolize the Conversation. We appreciate passion and conviction, but we also believe strongly in giving everyone a chance to air their thoughts. Therefore, in addition to civil interaction, we expect commenters to offer their opinions succinctly and thoughtfully, but not so repeatedly that others are annoyed or offended. If we receive complaints about individuals who take over a thread or forum, we reserve the right to ban them from the site, without recourse.
  • Only English comments will be allowed.

Perpetrators of spam or abuse will be deleted from the site and prohibited from future registration at Investing.com’s discretion.

Write your thoughts here
 
Are you sure you want to delete this chart?
 
Post
Post also to:
 
Replace the attached chart with a new chart ?
1000
Your ability to comment is currently suspended due to negative user reports. Your status will be reviewed by our moderators.
Please wait a minute before you try to comment again.
Thanks for your comment. Please note that all comments are pending until approved by our moderators. It may therefore take some time before it appears on our website.
Comments (2)
Kaveh Sun
Kaveh Sun May 05, 2021 1:40AM ET
Saved. See Saved Items.
This comment has already been saved in your Saved Items
Boeing cutting corners again. Ceo wants a fat bonus.
danny Levine
danny Levine May 05, 2021 12:09AM ET
Saved. See Saved Items.
This comment has already been saved in your Saved Items
LOL bye bye Boeing
 
Are you sure you want to delete this chart?
 
Post
 
Replace the attached chart with a new chart ?
1000
Your ability to comment is currently suspended due to negative user reports. Your status will be reviewed by our moderators.
Please wait a minute before you try to comment again.
Add Chart to Comment
Confirm Block

Are you sure you want to block %USER_NAME%?

By doing so, you and %USER_NAME% will not be able to see any of each other's Investing.com's posts.

%USER_NAME% was successfully added to your Block List

Since you’ve just unblocked this person, you must wait 48 hours before renewing the block.

Report this comment

I feel that this comment is:

Comment flagged

Thank You!

Your report has been sent to our moderators for review
Disclaimer: Fusion Media would like to remind you that the data contained in this website is not necessarily real-time nor accurate. All CFDs (stocks, indexes, futures) and Forex prices are not provided by exchanges but rather by market makers, and so prices may not be accurate and may differ from the actual market price, meaning prices are indicative and not appropriate for trading purposes. Therefore Fusion Media doesn`t bear any responsibility for any trading losses you might incur as a result of using this data.

Fusion Media or anyone involved with Fusion Media will not accept any liability for loss or damage as a result of reliance on the information including data, quotes, charts and buy/sell signals contained within this website. Please be fully informed regarding the risks and costs associated with trading the financial markets, it is one of the riskiest investment forms possible.
Continue with Google
or
Sign up with Email