Topic Author
Posts: 1443
Joined: Mon Jun 18, 2001 1:29 pm

POP Quiz 10/31

Thu Oct 31, 2002 11:03 am

You're called to the flight deck B747 Classic. Capt's HSI showing the compass flag. You do all the normal, easy things, no help. Normal easy defined as: HSI, Compass coupler, INS and tried fiddling with the INS/Radio switch. Again, No help.

No significant history in the navigation system. What catches your eye is that this aircraft had a #2 & #3 electrical systems fail due to a split breaker meltdown and to make matters worse the #2 engines experienced an IFSD enroute to your station. All thise pesky problems have been fixed.

A little far fetched but we have had the compass problem gere and at previous lives. The second part is the set-up and hint.
Posts: 1319
Joined: Wed Jul 05, 2000 11:37 am

RE: POP Quiz 10/31

Thu Oct 31, 2002 12:49 pm

I wish I had some significant time on the B747, because this sounds like a good one.
Posts: 2398
Joined: Sun Sep 30, 2001 5:39 am

RE: POP Quiz 10/31

Thu Oct 31, 2002 2:25 pm

Sorry couldn't resist.
At worst, you screw up and die.

RE: POP Quiz 10/31

Thu Oct 31, 2002 2:43 pm

Dear Air2gxs -
Since you checked all other possible avenues for that captain's compass flag, the only reason, then, would be Standby IGN on #1 or #2... move the IGN selector back to NORMAL...
(s) Skipper
Topic Author
Posts: 1443
Joined: Mon Jun 18, 2001 1:29 pm

RE: POP Quiz 10/31

Thu Oct 31, 2002 3:19 pm


You da man.

Due to load shedding issue, it was determined by some un-named avionics/electrical engineer that if you move the standby ignition switch to either standby position, the system sheds the captain's HSI.

Doesn't make sense to me either.

RE: POP Quiz 10/31

Thu Oct 31, 2002 3:57 pm

Do you think it makes sense to me...?
Worse is - I am supposed to explain why - to trainees... -
I call it "Renton classified PFM..."
Do I get my piece of candy...  Wink/being sarcastic
(s) Skipper

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