PaintSquare.com
Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram Visit the TPC Store
Search the site

 

Advertisement

PaintSquare


Coatings Industry News

Main News Page


Coatings Blamed for Aircraft Fuel Leak

Tuesday, February 26, 2013

More items for Coating Materials

Comment | More

Flawed coatings are responsible for a fuel leak in Boeing’s 787 Dreamliner aircraft, investigators in Japan have determined after a slew of problems have grounded the planes worldwide.

A fuel leak in a Japan Airlines Boeing 787 Dreamliner during maintenance work was due to a malfunction in the valve of a fuel pipe caused by a problem with the coatings, Japan's Land, Infrastructure, Transport and Tourism Ministry (MLIT) said on Friday (Feb. 22).

Boeing

Two fuel leaks in a Boeing 787 Dreamliner were caused by a problem with coatings, investigators in Japan said. 

The ministry launched an investigation after two fuel leaks occured on a Dreamliner operated by Japan Airlines Co. Ltd. just days before the plane was grounded around the world following several battery problems.

2 Fuel Leaks

As maintenance engineers removed fuel from a 787 at Narita International Airport on Jan. 13, about 100 liters of jet fuel leaked from the valve. An indicator in the cockpit showed the valve was closed when it was actually open.

The same aircraft had leaked fuel at Boston's Logan International Airport on Jan. 9, and an investigation found that a foreign substance stuck in the fuel tank caused a different valve to fail.

Japan's Transport Ministry said it believed there were deficiencies in the way electrical-insulating coatings were applied during the manufacturing process to the mechanism that opens and closes the fuel tank valve.

"The problem of fuel leaks has been cleared up," said Akihiro Ohta, minister of MLIT.

The ministry's air safety regulators instructed Japan Airlines and All Nippon Airways Co. to conduct more rigorous valve checks each time the aircraft flies or during inspections. Both carriers said they had received the instructions, but declined to comment further, The Wall Street Journal reported.

Officials said the manufacturer of the valve equipment already revised the production process.

Unresolved Battery Issue

The Boeing 787 jets have been grounded worldwide after one of the planes made an emergency landing in January because of smoke in the cockpit, leading to probes into the electrical system, particularly the lithium-ion batteries.

Japanese authorities still have not determined the cause of the battery issue.

Last week, United Continental Holdings said it was taking the Dreamliner out of its flying plans through June 5, except for a Denver-to-Tokyo route scheduled for May. The route was originally scheduled to start March 31.

United is the only U.S. carrier currently operating the 787 and has six of the planes.

Boeing calls the aircraft the "world's most advanced family of jetliners."

Boeing, FAA DIscuss Issues

Boeing released a statement earlier in February, saying it welcomed the progress reported by the U.S. National Transportation Safety Board in the 787 investigation, including the identified battery problems.

"We are working collaboratively to address questions about our testing and compliance with certification standards, and we will not hesitate to make changes that lead to improved testing processes and products," the statement said.

Dave Sizer / Wikimedia Commons

All Boeing 787s have been grounded worldwide after problems with the lithium-ion batteries caused smoke to fill the cockpit of one plane. The battery problem is unrelated to the fuel valve issue, officials said.

On Friday (Feb. 22), the U.S. Federal Aviation Administration said that Deputy Transportation Secretary John Porcari, FAA Administrator Michael P. Huerta, and other FAA officials met with senior executives from Boeing to discuss the 787 battery issues.

The FAA is reviewing a Boeing proposal and "won't allow the 787 to return to commercial service until we're confident that any proposed solution has addressed the battery failure risks."

The plane has two primary rechargeable batteries—the main and auxiliary power unit (APU). The batteries serve separate purposes: the main battery powers the aircraft before the engines have started, supports ground operations like refueling and powering the brake system when the airplane is towed, and provides backup power in the event of a power failure; the APU battery supplies the power to start the airplane engines. 

Both batteries are lithium-ion, which Boeing says can deliver a large amount of power in a short period of time and can recharge in a relatively short period of time.

The batteries for the 787s each have eight cells and have logged more than 2.2 million cell-hours on the ground and 50,000 in-air flight hours, according to Boeing. Before January 2013, no battery-related incidents had occurred.

   

Tagged categories: Coating failure; Corrosion

Comment Join the Conversation:

Sign in to our community to add your comments.

Advertisements
 
Mitsubishi Gas Chemical America
 
Performance Amine 1,3-BAC
 
A highly reactive cycloaliphatic diamine offering superior performance. Reasonable cost and curing efficacy makes it suitable for all types of epoxy resin applications.
 

 
Jotun Paints Inc.
 
Jotun Jotachar 1709
 
Mesh-free passive fire protection epoxy designed to protect against hydrocarbon pool fire scenarios for up to four hours as defined in the ANSI/UL1709 standard.
 

 
Carboline Company
 
History. Service. Innovation.
 
We are a global leader in coatings, linings, and fireproofing. We have the right people, right products, and right locations.
 

 
Tarps manufacturing, Inc.
 
QUALITY MADE IN AMERICA —Available near you!
 
CLICK to get a behind-the-scenes look at how Tarps Manufacturing makes the highest-quality tarps right here in the USA — available nationwide.
 

 
PPG Protective and Marine Coatings Group
 
We Protect and Beautify the World
 
PPG is widely recognized as a world leader in protective and marine coatings, developing innovative, cutting-edge products and services.
 

 
Termarust Technologies
 
Termarust (HR CSA) Chemically Stops
Active Corrosion
 
Arch truss treated with Termarust's (HR CSA) in 2003. This steel arch bridge is rust free on all surfaces including the crevice corroded joints and connections.
 

 
Sherwin-Williams
 
Sherwin-Williams Protective & Marine Coatings
 
With 4,000 distribution points and 3,700+ years of combined experience, Sherwin-Williams delivers the products, support and expertise you need, right where you need it.
 

 
Tnemec Company, Inc.
 
Online Coating Courses from Tnemec
 
For decades, Tnemec has offered its expertise to clients presenting face-to-face coatings courses. Now, these presentations are available to anyone for CEUs at Tnemec University.
 

 
BASF
 
New resins from BASF will have metals loving water!
 
Excellent corrosion resistance, low VOC, high gloss, thin films www.basf.us/industrialcoatings dpsolutions@basf.com 800-231-7868
 

 
Industrial Vacuum Equipment Corp.
 
Hurricane Vacuums
& Dust Collectors
 
Vacuum and dust collector hose, filters and related accessories.
IndustrialVacuum.com
 

 
 
 

Technology Publishing Co., 1501 Reedsdale Street, Suite 2008, Pittsburgh, PA 15233

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@paintsquare.com


The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us