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SQ006 PVD RWY Identification

Posted: Fri Feb 26, 2010 7:50 pm
by kimon
Had the crew not ignored that the PVD remained shuttered,whould it have saved them from disaster?
The failure of the PVD to unshutter indicated to the flight crew that the aircraft was not at the correct location for takeoff.
Does PVD assist the crew in determining whether the aircraft is on the correct runway or ONLY to provide steering guidance under low visibility conditions for centreline tracking and not to identify the correct location for takeoff?
What is the difference between position and location?
Is PVD merely provide reversionary visual guidance and has no role in other ground operations?
AFM states that PVD will shutter /unshutter dependent upon whether the aircraft is in a position for takeoff or not.
CVR SQ006:
CM-2 "PVD hasn't lined up ah"
CM-1 "Yeah we gotta line up first"
CM-3 "We need forty five degrees" (PVD only arms within 45 degrees of the runway heading).
CM-1 "Not on yet er PVD huh never mind we can see the runway,not so bad" (After lining up,PVD still shuttered as it was not within the valid localizer region for RWY 05L).

EICAS message>PVD SYS CAPT F/O indicates that
*ILS frequency not correctly selected
*Aircraft not withing the valid localizer region
*Aircraft heading not with 45° RWY HDG
*PVD has malfunctioned
*An aircraft is blocking ILS signal

[Edited 2010-02-26 11:56:45]

RE: SQ006 PVD RWY Identification

Posted: Fri Feb 26, 2010 8:19 pm
by Fly2HMO
Quoting kimon (Thread starter):
shuttered

excuse me? not sure what context your using that word with.

Quoting kimon (Thread starter):
ONLY to provide steering guidance under low visibility conditions for centreline tracking and not to identify the correct location for takeoff?

In a nutshell, yes   

RE: SQ006 PVD RWY Identification

Posted: Sat Feb 27, 2010 11:34 pm
by Mir
Ok, I've thought about this for a bit, done some Googling, and I'm still wondering:

What's a PVD? That's a term I've never heard before.

-Mir

RE: SQ006 PVD RWY Identification

Posted: Sun Feb 28, 2010 12:48 am
by Fabo
Para Visual Display. It has been discussed here lately to the detail.

RE: SQ006 PVD RWY Identification

Posted: Sun Feb 28, 2010 2:07 am
by 411A
All very interesting, however...SQ did not order PVD's as a line item on their aircraft...IE: not installed.

RE: SQ006 PVD RWY Identification

Posted: Sun Feb 28, 2010 8:36 am
by kimon
Yes,All SQ 744 pax are equipped with PVD but not freighters.
See SQ AFM + Boeing supplement on PVD.
SQ006:Upon entering the wrong runway, the flight crew had neglected to check the paravisual display (PVD).

[Edited 2010-02-28 00:41:38]

RE: SQ006 PVD RWY Identification

Posted: Sun Feb 28, 2010 8:38 am
by kimon
http://aerowinx.com/html/gallery04.html

As all BA fleet is equipped with PVD thus RVR minimums is 75 metres as opposed to non-PVD fleets which have RVR minimums of 125 metres.

[Edited 2010-02-28 00:43:23]

[Edited 2010-02-28 00:43:55]

RE: SQ006 PVD RWY Identification

Posted: Sun Feb 28, 2010 8:55 am
by kimon
I wish I could fit PVD on the coaming of my YM 2003 Jeep Grand Cherokee!
It is the most aesthetically pleasing item on the FD.
Non-PVD FDs look plain like a Xmas tree without Dolly Parton's bells-and-whistles!

RE: SQ006 PVD RWY Identification

Posted: Sun Feb 28, 2010 10:14 am
by mandala499
Kimon,
Not bad 3 topics on PVD in 2010 by you... and each one keeps talking about the same thing...
You have already shown us that QF maintenance picture, which shows the PVD in a maintenance check, not itself in action... in each of the 3 topics...
Plus, talking about reducing RVR has been mentioned in 2...
And the SQ006 has been mentioned in 2.

For me, I have simpler rules... if I cannot have adequate visual reference (either centerline lights or edge lights) in poor visibility, I don't power up for take off... simple.

Quoting kimon (Reply 7):
Non-PVD FDs look plain like a Xmas tree without Dolly Parton's bells-and-whistles!

I can also say that PVD equipped FDs is an extra maintenance cost item for most carriers... and makes the FD look like a christmas tree with too much candy hung from it...   

Gimme an EVS overlay on an HUD instead of a PVD any day of the week...

Mandala499

RE: SQ006 PVD RWY Identification

Posted: Sun Feb 28, 2010 11:31 am
by 411A
Quoting kimon (Reply 5):
Yes,All SQ 744 pax are equipped with PVD but not freighters.
See SQ AFM + Boeing supplement on PVD.

Require documentation to varify...not just your 'opinion'.

RE: SQ006 PVD RWY Identification

Posted: Sun Feb 28, 2010 7:08 pm
by 71Zulu
Seems logicaI that since the crew mentions the PVD on the transcript that they had it.

http://aviation-safety.net/investigation/cvr/transcripts/cvr_sq006.php

Quote:
23:15:52 CAM-1 It going to be very slippery I am going to slow down a bit, slow turn here

23:15:53 CAM-2 Turning that

23:16:07 CAM-2 And the PVD hasn't lined up ah

23:16:10 CAM-1 Yeah we gotta line up first

23:16:12 CAM-3 We need forty five degrees

23:16:15 CAM-2 I see, excellent man

23:16:16 CAM-1 Yah

23:16:23 CAM-1 Not on yet er PVD huh never mind we can see the runway, not so bad. Ok, I am going to put it to high first. OK ready eh, so zero one zero is from the left lah Ok

23:16:27 CAM-2 Ok

RE: SQ006 PVD RWY Identification

Posted: Sun Feb 28, 2010 7:53 pm
by kimon
Hi Mandala499,
EVS?
Which aircraft will be equipped with HUD?
Many thanks!
Kimon

RE: SQ006 PVD RWY Identification

Posted: Sun Feb 28, 2010 9:54 pm
by mandala499
Quoting kimon (Reply 11):
EVS?
Which aircraft will be equipped with HUD?

You can buy and add those HUDs with EVS on a lot of aircraft... at least HUDs...
Has been available on 320s and 737s for a while !
Slap that and EFB with moving map, and PVD's usability is limited to lowering the take off limits only...

Now, the thing is, all these stuff costs money to buy and maintain, and are rarely used... and the regulations regarding their uses need to catch up...

mandala499