Results 1 to 10 of 22
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12-11-2010, 04:12 PM #1
My PFD air speed display resets....
Hi,
It happened twice, and I know that most probably it is something in my setup or something that has to do with my flight plans settings, but I do not know how to fix this, so here it goes...
Both times it happened after or before (I am onot sure) the last STAR of the flight plan, when the ATC gave me a specific HDG and left LNAV/VNAV to HDG mode. After that my PFD airspeed display resets to zero (30 knots to be more specific) and the A/T doesnot operate and does not listen any speed I input.
After the usual approach procedures, when the aircraft is on final the airspeed display comes back again to the real speed.
Note: During all this, all other information including the altitude tape work perfectly.
Any idea ?
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12-11-2010, 05:08 PM #2
- Join Date
- Dec 2006
- Location
- Israel
- Posts
- 126
Re: My PFD air speed display resets....
Just guess
Are you engaging pitot heating?
You should do that
Otherwice pitot tubes freezing and wierd speed anhd altitude values displayed
Whe you are low again on approach- -temperature raising , the pitot not blocked by ice anymore and all cames to normal
This phenomina is simulated
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Post Thanks / Like - 1 Thanks, 0 Likes, 0 DislikesNick1150 thanked for this post
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12-11-2010, 05:54 PM #3
Re: My PFD air speed display resets....
If this is true, I am amazed !!!
In fact I do not engage pilot heating, but really could this be true ?
Just asking...
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12-11-2010, 06:06 PM #4
- Join Date
- Dec 2006
- Location
- Israel
- Posts
- 126
Re: My PFD air speed display resets....
Thats what happends in real life ,Nick
I have somewhere Discovery channel video abot B767 crached in the see , at night , becouse the ground crew forgot to remove the maskentapes from pitot tubes
The perfectly operational aircraft with expierienced crew crached only becouse they lost their altitude and speed indications by night over the see
Real storry with many lives lost
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12-11-2010, 06:09 PM #5
Re: My PFD air speed display resets....
Thanks yoss,
I will try it and let you know
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12-11-2010, 09:02 PM #6
- Join Date
- May 2008
- Location
- Sao Paulo - Brazil
- Posts
- 20
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Post Thanks / Like - 1 Thanks, 0 Likes, 0 DislikesNick1150 thanked for this post
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12-12-2010, 02:47 AM #7
Re: My PFD air speed display resets....
Thanks for the response,
Actually I do not have an overhead yet, but I have an 11 switch panel located on my pedestal box instead connected with a Leo Bodnard card for that reason. All switches are assigned mainly for the lighting panel and autostart, shutdown of both engines plus generators a and b....
Unfortunately the switches are all occupied, I will have to exchange a switch with pilot heat on/off, until I add more switches in this panel.
Thanks,
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12-13-2010, 03:43 PM #8
- Join Date
- Mar 2007
- Location
- Stockholm, Sweden
- Posts
- 67
Re: My PFD air speed display resets....
I have the very same symptoms in the B737 PM PFD - Speed suddenly goes to zero (30) and after 30 sec it is back to normal again.
This happens on 1-2 hr flights randomly - mostly only once per flight.
All anti-icing and probe heat is on, so that is not the problem.
Full Magenta suit incl. pmSystems - build 480.
Bjorn
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12-13-2010, 06:01 PM #9
- Join Date
- Dec 2006
- Location
- Ireland
- Posts
- 255
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12-13-2010, 08:22 PM #10
- Join Date
- May 2008
- Location
- Sao Paulo - Brazil
- Posts
- 20
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