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Chieftain down in SA

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Old 29th Jan 2014, 21:41
  #61 (permalink)  
 
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Never heard that one and if I did I would refuse to fly the aircraft as any single engine performance will be woefull.
This rumour has been around for a while. I think enough people have mentioned it to give it some credibility - at least with particular operatores and / or LAME's.

It was given as a potential factor in the Canley Vale crash and the reason the Mojave couldn't maintain height on one engine. Of course this was never investigated by the ATSB who incorrectly applied wind vectors to radar based ground speed to conclude the pilot had inadequate airspeed control.

Setting the waste gates correctly is time consuming and should involve a flight test climb to altitude. I suspect many LAME's just skip this part and make a conservative setting or presume the last guy set them correctly.
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Old 29th Jan 2014, 22:02
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Another issue regarding performance is the environmental envelope on the PA31. The manufacturers P-Charts for take-off and single engine performance go up to 36c at sea level and fall away with altitude, just allowing ISA +20 operation. After an accident in the US where a Navajo did not maintain height after a failure at altitude with sea level temps of 39c the NTSB and FAA made a point that the aircraft was operating outside of its certified limits and performance can not be guaranteed. The lines ending on the charts signified the temperature limits of certified performance.
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Old 29th Jan 2014, 22:08
  #63 (permalink)  
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601, it is shorter, but also has less power.
CB Hunter

Just trying to have a dig at all the "know it alls" who keep referring to the aircraft as a Chieftain.

Count the windows
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Old 29th Jan 2014, 22:29
  #64 (permalink)  
 
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Setting the waste gates correctly is time consuming and should involve a flight test climb to altitude.
You don't actually set the waste gates in the Navajo. There is a setting screw on the density controller that sets maximum manifold pressure for full throttle. It is set by measuring compressor discharge temperature and ensuring actual manifold pressure is within a range for that temp.

The density controller governs maximum power available.

The differential controllers maintain set power when below maximum.
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Old 30th Jan 2014, 00:39
  #65 (permalink)  
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Count the windows
First thing I did when seeing the photo.

Note that the Advertiser report stated that the a/c concerned had previously been involved in a landing incident, late last year.

Wonder just how much damage to the airframe the latest incident will have done. Also hate to think what this will do to the insurance premiums!
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Old 30th Jan 2014, 01:00
  #66 (permalink)  
 
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VH-XXX is correct with his question about blacking out the rego. The very move is indicative of a serious flaw in the owners personality traits - as in a need to hide already-obvious items, when things go wrong, or questions might be asked.

It's a childish, immature trait - just as kids produce blatant lies we can see through instantly, when they're obviously guilty of a transgression they know they shouldn't have done.

It's obvious the owner of VH-OFF is fearful of many other previously-hidden aviation transgressions being found out, and he wants no scrutiny from anyone, in case they're found.
Unfortunately, he needs to man-up and understand that with owning an aircraft, there comes a great degree of scrutiny and a need to be squeaky-clean - because that scrutiny he may be constantly trying to avoid, will eventually fall upon him out of left field - and uncover every failing, large or small, that he has desperately tried to hide, for so long.
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Old 30th Jan 2014, 02:29
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I had a long-time Chieftain engineer tell me that he will not set the density controllers to provide more than 40-42" because "If your pilots have a cold day they will blow the pots off".
I found most set around 44".

Navajo I was flying the other day only got 40" on takeoff (43" redline).

Overboost will also occur if the oil hasn't warmed up sufficiently.

Isn't anyone taught to observe manifold pressures as power is increased on takeoff anymore!?!!

Go the GSIO's!
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Old 30th Jan 2014, 08:43
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Be aware that OFF is (was? ) available for cross hire to other (select ) pilots / companies who met the criteria for insurance, currency, experience, etc, etc.
Are you sure about that?
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Old 30th Jan 2014, 08:54
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Are you sure about that?
Show me a twin and I'll show you an owner who will accept hire fees from a trusted pilot.
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Old 30th Jan 2014, 09:34
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That particular owner (& the pilot flying that day) is not one of the ones needing to subsidise his aircraft ownership.

Covering the registration is likely to have been to ensure his other aviation interest (the commercial one) does not come under scrutiny. The work it does receives greater scrutiny than Casa provides.

Covering a company logo post accident is one thing, having an employee blank the registration may well be a breach of the regs.
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Old 30th Jan 2014, 09:38
  #71 (permalink)  
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The ATSB have confirmd the rego is VH-OFF.
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Old 30th Jan 2014, 09:52
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The ATSB have confirmd the rego is VH-OFF.
No kidding!

DF.
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Old 30th Jan 2014, 10:22
  #73 (permalink)  
 
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And then there’s the teensy problem that the registration holder for the aircraft commits an offence if the registration markings are not legible (CASR 45.085) …
Covering a company logo post accident is one thing, having an employee blank the registration may well be a breach of the regs.
I'm far too lazy to look up either the CASR or Regs, but would assume both reference an aircraft which is actually in flight. The only "gotcha" would be whatever references interference with an aircraft post accident?

.
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Old 30th Jan 2014, 10:43
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While 45.085 says the marking should be legible, CASR 45.035 (Requirements for Markings) actually says;
(1) Except as Division 45.B.2 allows otherwise, an Australian aircraft, whenever it is operated, must bear as many sets of its markings as is required by whichever is applicable of regulations 45.045, 45.050, 45.055 and 45.060.
The argument could be put forward that this aircraft, immediately after coming to rest, was at the time in fact not being operated?

Always thought the painters would probably beat the rescue crews to the aircraft in an airline's ideal post accident scenario.

Last edited by MakeItHappenCaptain; 30th Jan 2014 at 11:09.
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Old 30th Jan 2014, 10:53
  #75 (permalink)  
 
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It's obvious the owner of VH-OFF is fearful of many other previously-hidden aviation transgressions being found out, and he wants no scrutiny from anyone, in case they're found.
Big call from someone who does not know who blacked out the rego or the reason it was done. Was not done by employee of the owner.
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Old 30th Jan 2014, 14:09
  #76 (permalink)  
 
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QF "disguise" their retired aircraft before they head for storage or parting out at Victorville, CA. By painting the white roo red...

A thread killer, I rather suspect.
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Old 30th Jan 2014, 19:33
  #77 (permalink)  
 
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The argument could be put forward that this aircraft, immediately after coming to rest, was at the time in fact not being operated?
Good point!

That would mean everyone can cover up their rego after shutting down after each flight. Might keep some of those pesky landing fee hunters at bay …

Gerry111: If you know Qantas are doing it, it just goes to show that it doesn’t work!
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Old 30th Jan 2014, 20:21
  #78 (permalink)  
 
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That would mean everyone can cover up their rego after shutting down after each flight.
Cripes! Is the cover on my Cirrus actually illegal now?
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Old 30th Jan 2014, 20:22
  #79 (permalink)  
 
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Gee you Aussies get anal about some petty things.

Let's face it it's not airworthy, it cannot fly, who cares what state the rego is in?

A bit of black paint like this doesn't hide the aircrafts identity from those that need to know. It would be different if they tried to remove the data plate.

Come on guys worry about some important stuff.
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Old 30th Jan 2014, 20:59
  #80 (permalink)  
 
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Come on guys worry about some important stuff.
Booze and babes
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