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Smythe

8th Apr 2019 20:52

Interesting 787 Airworthiness Directive

Software issues....

This AD is effective March 22, 2019.

We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 787 series airplanes. This AD was prompted by a report of an uncommanded descent and turn that occurred after an inflight switch to the spare flight management function (FMF). This AD requires an inspection of the flight management system (FMS) to determine if certain operational program software (OPS) is installed and installation of new FMS OPS and a software check if necessary. For certain airplanes, this AD also requires concurrent actions. We are issuing this AD to address the unsafe condition on these products.

Fursty Ferret

9th Apr 2019 09:41

Been a BAB for some time now. About time really that it was fixed.

Manual Reversion

9th Apr 2019 10:18

I’m more concerned about the fact that the engine fire switch might not work. Will try to remember the advice on the fcom bulletin....land at the nearest suitable airport.

Fursty Ferret

9th Apr 2019 11:22

GE engines? Not aware of this one...

Manual Reversion

9th Apr 2019 12:58

Rolls Royce

airseb

10th Apr 2019 06:53

GE too. The problem seems to be the rotating fire engine switch... happy not to fly that kind of Boeing

EMIT	10th Apr 2019 06:58

Quote " a report of an uncommanded descent and turn that occurred after an inflight switch to the spare flight management function (FMF)."

... and the pilots just did ye olde "Aviate, Navigate, Communicate thing" so nothing untoward happened and no headlines were made.

For that part of society that happily awaits the future of airliners without pilots, it was a bleak day.

Dave Therhino

11th Apr 2019 03:45

The fire switch issue is independent of engine type.

Smythe

12th Apr 2019 17:15

Quote:

... and the pilots just did ye olde "Aviate, Navigate, Communicate thing" so nothing untoward happened and no headlines were made.

yes, but they lost 4000 feet during the adventure...plenty of places where that would not be a good thing?

uncommanded functions by the FMS are a bit more than the ANC thing.

EMIT	13th Apr 2019 06:18

Reality

Quote:

Originally Posted by Smythe (Post 10446152)

yes, but they lost 4000 feet during the adventure...plenty of places where that would not be a good thing?

uncommanded functions by the FMS are a bit more than the ANC thing.

No, everything was picked up within some 200 ft and max 20 degrees of heading change.

PJ2	13th Apr 2019 13:24

FAA B787 AD
http://rgl.faa.gov/Regulatory_and_Gu...2019-01-04.pdf

Yaw String

14th Apr 2019 23:21

As you say,with the Fire Switch bulletin still current..the descend and turn manoeuvre may be highly appropriate!!!

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