v**e
发帖数: 8422 | 1 40架生产中的波音787机翼出现裂纹
Wing cracks found on 787s in assembly
By: STEPHEN TRIMBLEWASHINGTON DCSource: Flightglobal.com11 hours ago
Roughly 40 Boeing 787s still in production may have cracks within shear ties
of a wing rib, the company says.
Boeing is inspecting aircraft that may have the condition on three assembly
lines in Everett, Washington, and North Charleston, South Carolina.
“We are addressing affected airplanes as required,” Boeing says in a
statement.
The issue is not expected to impact a plan to deliver 110 787s this year,
Boeing says.
The cracks were discovered by the 787’s wing supplier, Mitsubishi Heavy
Industries, Boeing says.
The Japanese supplier recently changed a manufacturing process that “may
have led to hairline cracks in a limited number of shear ties on a wing rib
in the 787”, Boeing says.
Shear ties, which attach the ribs to the wing skin, have disrupted 787
production before.
In 2010, Boeing discovered that the skin attachments in the 787’s rear
fuselage had to be replaced or fixed.
The initial design of the 787 had failed to account for thermal fatigue
loads on aluminium parts.
As a result, frequent cycles of cooling and warming in service could pry the
shear ties away from the skin. Boeing fixed the problem by using thicker
ties and radius fillers on future 787s, requiring 400h to install at
suppliers and significantly more for aircraft in final assembly.
The new problem reported by Mitsubishi Heavy Industries, which was first
disclosed by the Wall Street Journal, affects about 40 aircraft, Boeing says
.
The Wall Street Journal reports that the aircraft affected are line numbers
151 to 193.
Flightglobal’s Ascend online database lists the following aircraft in that
sequence | m********5
发帖数: 17667 | | c****g
发帖数: 37081 | | k*****r
发帖数: 21039 | 4 麻痹的不怕死的就去坐蜜油和阿三的飞机。
米国的蜜油阿三的垃圾公司，csco, intc, qcom, 都要被东亚民族的优秀公司整死。
哈哈。
ties
assembly
【在 v**e 的大作中提到】
: 40架生产中的波音787机翼出现裂纹
: Wing cracks found on 787s in assembly
: By: STEPHEN TRIMBLEWASHINGTON DCSource: Flightglobal.com11 hours ago
: Roughly 40 Boeing 787s still in production may have cracks within shear ties
: of a wing rib, the company says.
: Boeing is inspecting aircraft that may have the condition on three assembly
: lines in Everett, Washington, and North Charleston, South Carolina.
: “We are addressing affected airplanes as required,” Boeing says in a
: statement.
: The issue is not expected to impact a plan to deliver 110 787s this year,
| M********d
发帖数: 5274 | 5
你做什么飞机，我跟你学
【在 k*****r 的大作中提到】
: 麻痹的不怕死的就去坐蜜油和阿三的飞机。
: 米国的蜜油阿三的垃圾公司，csco, intc, qcom, 都要被东亚民族的优秀公司整死。
: 哈哈。
:
: ties
: assembly
|
|
