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-   -   Apu inop (https://www.airlinepilotforums.com/air-wisconsin/135016-apu-inop.html)

squib 09-14-2021 03:24 PM

Apu inop
 
Why are some of you CA’s out there in hot and humid temps while forcing passengers to wear masks for hours on end accepting airplanes with an inoperative APU?

Asking for a friend. #notreally

TiredSoul 09-14-2021 04:40 PM

Because it’s not really such a humanitarian drama you make it out to be?

idlethrust 09-14-2021 05:24 PM

[QUOTE=TiredSoul;3295228]Because it’s not really such a humanitarian drama you make it out to be?[/QUOTE

Then why don’t you sit in the back of one of these hot boxes when its 85-90 degrees out, no apu , one pack on Mel or something like that .
We had to do it on a dh, it was absolutely brutal , borderline intolerable.

PossibleDeviation 09-14-2021 05:59 PM

[QUOTE=idlethrust;3295252]

Originally Posted by TiredSoul (Post 3295228)
Because it’s not really such a humanitarian drama you make it out to be?[/QUOTE

Then why don’t you sit in the back of one of these hot boxes when its 85-90 degrees out, no apu , one pack on Mel or something like that .
We had to do it on a dh, it was absolutely brutal , borderline intolerable.

Yep - that's a fact. Single pack or no APU and > 80F... refuse it.

jetlag q 09-14-2021 08:30 PM

[QUOTE=idlethrust;3295252]

Originally Posted by TiredSoul (Post 3295228)
Because it’s not really such a humanitarian drama you make it out to be?[/QUOTE

Then why don’t you sit in the back of one of these hot boxes when its 85-90 degrees out, no apu , one pack on Mel or something like that .
We had to do it on a dh, it was absolutely brutal , borderline intolerable.

couldn't have said that any better

EELightning 09-15-2021 08:06 AM

At many airlines, operations make the decisions on how miserably low the passenger experience bar will be set. Captains can reject a plane if it cannot be operated safely.

dremaldent 09-15-2021 09:30 AM

Take about 500 lbs extra fuel and then increase thrust on the right engine. It only takes about 70% N2 to deliver the maximum PSI to the PACK. The only downside is that you can't do this while you're moving. I've successfully cooled the cabin to 24 degrees using this technique. Not the most comfortable but at least a safe temperature, and better than canceling the flight by a long shot.

No APU really isn't that big of a deal. Obviously a little more work, but it is still possible to run flights safely unless the temperature outside is over 100 F.

JohnnyBekkestad 09-15-2021 11:18 AM


Originally Posted by dremaldent (Post 3295481)
Take about 500 lbs extra fuel and then increase thrust on the right engine. It only takes about 70% N2 to deliver the maximum PSI to the PACK. The only downside is that you can't do this while you're moving. I've successfully cooled the cabin to 24 degrees using this technique. Not the most comfortable but at least a safe temperature, and better than canceling the flight by a long shot.

No APU really isn't that big of a deal. Obviously a little more work, but it is still possible to run flights safely unless the temperature outside is over 100 F.

hahahaha 70% N2 while on the ground with planes behind you????
You will get a phone call from the chief and a drug test…

KirillTheThrill 09-15-2021 12:06 PM


Originally Posted by dremaldent (Post 3295481)
Take about 500 lbs extra fuel and then increase thrust on the right engine. It only takes about 70% N2 to deliver the maximum PSI to the PACK. The only downside is that you can't do this while you're moving. I've successfully cooled the cabin to 24 degrees using this technique. Not the most comfortable but at least a safe temperature, and better than canceling the flight by a long shot.

No APU really isn't that big of a deal. Obviously a little more work, but it is still possible to run flights safely unless the temperature outside is over 100 F.

That’s reckless and an easy way to damage other aircraft and equipment in close proximity, not to mention zero regard for FOD prevention.

DarkSideMoon 09-15-2021 12:21 PM


Originally Posted by dremaldent (Post 3295481)
Take about 500 lbs extra fuel and then increase thrust on the right engine. It only takes about 70% N2 to deliver the maximum PSI to the PACK. The only downside is that you can't do this while you're moving. I've successfully cooled the cabin to 24 degrees using this technique. Not the most comfortable but at least a safe temperature, and better than canceling the flight by a long shot.

No APU really isn't that big of a deal. Obviously a little more work, but it is still possible to run flights safely unless the temperature outside is over 100 F.

You need to crack open the books again. 70% N1 on the ground is *not cool* outside of the runup pad or something. Seriously, you’re going to damage something eventually and management will throw you under the bus for trying to make them happy. I have seen photos of a steel baggage cart flipped on its side from people doing similar stuff in a -200.

puddlejumper 09-15-2021 01:31 PM

70% N2 is about 48% N1.

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dremaldent 09-15-2021 01:43 PM


Originally Posted by dremaldent (Post 3295481)
Take about 500 lbs extra fuel and then increase thrust on the right engine. It only takes about 70% N2 to deliver the maximum PSI to the PACK. The only downside is that you can't do this while you're moving. I've successfully cooled the cabin to 24 degrees using this technique. Not the most comfortable but at least a safe temperature, and better than canceling the flight by a long shot.

No APU really isn't that big of a deal. Obviously a little more work, but it is still possible to run flights safely unless the temperature outside is over 100 F.

I'm an idiot. Don't do this. Combination of misremembering things and being very tired. Sorry y'all

squib 09-15-2021 05:57 PM


Originally Posted by dremaldent (Post 3295594)
I'm an idiot. Don't do this. Combination of misremembering things and being very tired. Sorry y'all

Must be the side affects from operating without an apu to complete the mission.

Pedro4President 09-15-2021 06:18 PM

So I’m assuming you are talking about the 145. No APU is kinda an iffy one. It only really sucks on the taxi out and does fine once you are in the air. The thing is you have to have a good PCA to cool it down and leave it on as long as possible. If no PCA then I’m not taking it.



It’s the pack1 inop that is an absolute no go item when it’s hot and sunny out there. The flight deck gets north of 45 at times. I have taken them without a pack1 when it wasn’t too hot but sunny. Big mistake. The avionics heats up the flight deck pretty good too.

Sasquatched 09-15-2021 06:45 PM


Originally Posted by Pedro4President (Post 3295692)
So I’m assuming you are talking about the 145. No APU is kinda an iffy one. It only really sucks on the taxi out and does fine once you are in the air. The thing is you have to have a good PCA to cool it down and leave it on as long as possible. If no PCA then I’m not taking it.



It’s the pack1 inop that is an absolute no go item when it’s hot and sunny out there. The flight deck gets north of 45 at times. I have taken them without a pack1 when it wasn’t too hot but sunny. Big mistake. The avionics heats up the flight deck pretty good too.

You’re in the Air Whiskey forum Pedro. Safe to assume they’re referring to the Deuce.

Pedro4President 09-16-2021 04:25 AM


Originally Posted by Sasquatched (Post 3295711)
You’re in the Air Whiskey forum Pedro. Safe to assume they’re referring to the Deuce.

It just goes to show how little I keep up with everything.

pitchtrim 09-16-2021 07:39 AM

Doesn't the book say the cabin can't reach 30c with pax on board? Makes the decision pretty easy to refuse the plane when you can't maintain what's in the book.

RJ4LIFE 09-18-2021 01:29 PM


Originally Posted by dremaldent (Post 3295481)
Take about 500 lbs extra fuel and then increase thrust on the right engine. It only takes about 70% N2 to deliver the maximum PSI to the PACK. The only downside is that you can't do this while you're moving. I've successfully cooled the cabin to 24 degrees using this technique. Not the most comfortable but at least a safe temperature, and better than canceling the flight by a long shot.

No APU really isn't that big of a deal. Obviously a little more work, but it is still possible to run flights safely unless the temperature outside is over 100 F.

You took a lot of flak for this being unsafe but I'd contend that it can be done perfectly safely once you're away from the ramp, especially at outstations where there's usually nobody taxiing directly behind you. The problem is that as the cabin cools down, your brakes will quickly heat up and you might even end up having to delay your takeoff to let them cool, which defeats the whole purpose. Ask me how I know ;)

JohnnyBekkestad 09-18-2021 01:34 PM


Originally Posted by RJ4LIFE (Post 3297125)
You took a lot of flak for this being unsafe but I'd contend that it can be done perfectly safely once you're away from the ramp, especially at outstations where there's usually nobody taxiing directly behind you. The problem is that as the cabin cools down, your brakes will quickly heat up and you might even end up having to delay your takeoff to let them cool, which defeats the whole purpose. Ask me how I know ;)

If you are at at outstation and can be airborne within a few minutes of starting to taxi then this wouldn't be a problem. Try to do that in O'Hare on a warm summer pre covid day...
I made the mistake to take a 200 in ORD early in the morning, first flight of the day to MKE and back. BIG mistake, and swore never to do that again. The problem is not the flight time, its the taxi time, you cant or shouldn't taxi with enough power to cool the cabin without the APU.

TiredSoul 09-18-2021 01:58 PM

Is that why y’all taxi at 70mph?

tonsterboy5 09-18-2021 07:20 PM


Originally Posted by TiredSoul (Post 3297139)
Is that why y’all taxi at 70mph?

no we taxi at 70 so we can get to the gate and get off the plane before management gets to the gate to inform of us our junior man.

squib 09-18-2021 08:12 PM


Originally Posted by tonsterboy5 (Post 3297246)
no we taxi at 70 so we can get to the gate and get off the plane before management gets to the gate to inform of us our junior man.

The company cannot force a person to fly an airplane. Simply say no and go home.

Guppydriver95 09-19-2021 06:04 AM


Originally Posted by squib (Post 3295183)
Why are some of you CA’s out there in hot and humid temps while forcing passengers to wear masks for hours on end accepting airplanes with an inoperative APU?

Asking for a friend. #notreally

One of the most important lessons to learn about being a Captain is knowing when to say “NO”. You’re not there to mindlessly move tin. Sometimes you have to be willing to do the right thing, even if it makes the company mad.

GA2Jets 09-19-2021 06:18 AM


Originally Posted by squib (Post 3297259)
The company cannot force a person to fly an airplane. Simply say no and go home.

No, but they sure can try and fire you.

RabidW0mbat 09-19-2021 06:55 AM


Originally Posted by GA2Jets (Post 3297323)
No, but they sure can try and fire you.

“in the interest of passenger safety” is a great tool in your bag of Captain tricks.

DarkSideMoon 09-19-2021 07:09 AM


Originally Posted by RabidW0mbat (Post 3297329)
“in the interest of passenger safety” is a great tool in your bag of Captain tricks.

They’re talking about junior manning. Passenger safety only comes into play if you’re calling fatigued which was already a valid way to get out of a junior man.

tonsterboy5 09-19-2021 11:19 AM


Originally Posted by squib (Post 3297259)
The company cannot force a person to fly an airplane. Simply say no and go home.

i was being sarcastic, I don’t think I know anyone who taxis close to 70, nor do I know anyone who would do so to avoid face time with a company representative.

Southern Fried 09-23-2021 11:01 AM


Originally Posted by RJ4LIFE (Post 3297125)
You took a lot of flak for this being unsafe but I'd contend that it can be done perfectly safely once you're away from the ramp, especially at outstations where there's usually nobody taxiing directly behind you. The problem is that as the cabin cools down, your brakes will quickly heat up and you might even end up having to delay your takeoff to let them cool, which defeats the whole purpose. Ask me how I know ;)

So, the CRJ(200) will heat up the brakes with the engines at 70% N2? Interesting.
We could taxi all day at 72% N2 on the 145 to keep the packs pumping cool air. Never had a problem with brake temps doing that. Having said all of that, I have refused aircraft with pack 1 inop in the summer because of the heat in the cockpit...

Fox51 09-24-2021 06:59 PM

Can't find a gate at your outstation??
 
Maybe it's not...not what the folks say, that the government and unemployment is paying people to stay home...maybe its that ground services pay absolute ****. $9.50 most outstations. Maybe MX pays **** for what they do. Yea MX just got a raise but it's still really hostile. Corporate is making a war over small things.

KATW Unifi ramp position

DarkSideMoon 09-24-2021 09:29 PM


Originally Posted by Fox51 (Post 3299962)
Maybe it's not...not what the folks say, that the government and unemployment is paying people to stay home...maybe its that ground services pay absolute ****. $9.50 most outstations. Maybe MX pays **** for what they do. Yea MX just got a raise but it's still really hostile. Corporate is making a war over small things.

KATW Unifi ramp position

Is this the latest iteration of DGS?

Edit- yup, it’s DGS. That company is a monument to how bad letting accountants run the show with 0 oversight can be.

TegridyFarms 09-26-2021 05:01 AM


Originally Posted by DarkSideMoon (Post 3300005)
Is this the latest iteration of DGS?

Edit- yup, it’s DGS. That company is a monument to how bad letting accountants run the show with 0 oversight can be.

Guess how much a Delta owned ground handling subsidiary cares about United Express getting into their gate/off their gate/deplaned? Hint: whatever is the minimum required to keep the parent company (United) from terminating their contract and going with another one of their subsidiaries instead.

squib 09-26-2021 05:14 PM


Originally Posted by TegridyFarms (Post 3300405)
Guess how much a Delta owned ground handling subsidiary cares about United Express getting into their gate/off their gate/deplaned? Hint: whatever is the minimum required to keep the parent company (United) from terminating their contract and going with another one of their subsidiaries instead.

You must be new around these parts. I'll have the pandemic special for $100 Trebek.

Jk3728 09-26-2021 05:36 PM

Keeping with the theme of the thread. Are y’all allowed to run the Packs off a huffer cart or is that against company policy?

squib 09-26-2021 05:50 PM


Originally Posted by Jk3728 (Post 3300708)
Keeping with the theme of the thread. Are y’all allowed to run the Packs off a huffer cart or is that against company policy?

High pressure ground air to run the packs? No. Plus that cart usually doesn't arrive until 10 minutes past departure time so it doesn't matter anyway.

Jk3728 09-26-2021 05:55 PM


Originally Posted by squib (Post 3300715)
High pressure ground air to run the packs? No. Plus that cart usually doesn't arrive until 10 minutes past departure time so it doesn't matter anyway.



Lol thx for the answer.


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