Bonjour !
Vu sur AviationWeek, Guy Norris !
Les conditions de retour du B787 en service !
Bien, tout le monde est assez prudent, évidemment !
Intéressant, page 2, Boeing en a profité pour conduire un paquet de test et de mises à jour pour les systèmes électriques !
Et avec raison, c'était une source de PB récurrents, mais est ce aussi innocent ??
----------- AviationWeek, le lien et la 2° page éditée ---------------
http://www.aviationweek.com/Article.aspx?id=/article-xml/AW_04_15_2013_p41-567137.xml&p=1
Page 2 :
Boeing is also using the 787 downtime to develop, test and certify a
series of other systems improvements to areas that proved troublesome
during the aircraft's initial service period. The work included testing a
revised power panel design, an improved engine anti-ice system and
upgrades to the back-up standby instrument displays and crew information
system (CIS), a Honeywell-developed aircraft health-monitoring feature
that forms part of the 787's central maintenance computer.
Boeing says that, following FAA clearance to resume test flights, it has been
conducting “routine test flights designed to address some of the
component reliability projects we have been working. One such flight
last week was to conduct testing to address some of the power panel
improvements we have been working. We are always working to improve
component reliability, and a new airplane program always has some start
up issues.
This work never stopped. In fact, during the return to flight
work we're doing with the airlines, we will be addressing several
improvements that should help further improve the 787's overall
reliability and performance, including screening of power panels and
several other activities.”
Ground tests of new software for the aircraft's power electronics cooling system (PECS) were also undertaken.
The PECS dissipates the heat created by the large, high-voltage motor
controllers that condition the variable-frequency power generated by the
engines and auxiliary power unit (APU) for use by aircraft systems.
Although portions of the large motor power system are energized by the
APU battery, the changes are related to the overall electrical system
upgrades rather than being associated with the battery modification.
The power panel was the source of early in-service issues with the 787, at
least one of which on an ANA aircraft in April was traced to a short
circuit in one of the units. Power panel malfunctions were also behind a
string of events in December that triggered error messages indicating
failures of the aircraft's starter-generators.
JPRS