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DC-10 Stall Test Question  
User currently offlineUAL Bagsmasher From United States of America, joined Sep 1999, 2146 posts, RR: 10
Posted (13 years 5 months 4 days 13 hours ago) and read 2422 times:

Which breakers must be powered in order to get the stall test system to function? Is it just one breaker? If so, whereabouts on the breaker panel is it located?

30 replies: All unread, showing first 25:
 
User currently offlineFDXmech From United States of America, joined Mar 2000, 3251 posts, RR: 35
Reply 1, posted (13 years 5 months 4 days 13 hours ago) and read 2257 times:

No c/b is pulled for the DC10 stall warning test as far as I know. Are you perhaps thinking of trying to inhibit the autoslat function from activating while performing a stall warning test?


You're only as good as your last departure.
User currently offlineFDXmech From United States of America, joined Mar 2000, 3251 posts, RR: 35
Reply 2, posted (13 years 5 months 4 days 13 hours ago) and read 2233 times:

I'm sorry, I misread powered for pulled.


You're only as good as your last departure.
User currently offlineUAL Bagsmasher From United States of America, joined Sep 1999, 2146 posts, RR: 10
Reply 3, posted (13 years 5 months 4 days 13 hours ago) and read 2234 times:

No...I was up in a DC-10 a few days ago and hit the stall test switch on the overhead panel, and nothing happened. The aircraft was secured for the night and all the yellow breakers were pulled. I was just wondering if that had something to do with why the stall test didn't function.

User currently offlineUAL Bagsmasher From United States of America, joined Sep 1999, 2146 posts, RR: 10
Reply 4, posted (13 years 5 months 4 days 13 hours ago) and read 2230 times:

I've been meaning to ask you something else also. How are the Ex-UA DC-10's holding up over at FedEx? They give you guys a lot of problems?

User currently offlineFDXmech From United States of America, joined Mar 2000, 3251 posts, RR: 35
Reply 5, posted (13 years 5 months 4 days 12 hours ago) and read 2229 times:

The stall warning test has a time delay circuit which requires the test switch to be held in test for approx 10 seconds. Its not an instant stick shaker like other types.

I'll get back to you on the UAL DC10's because the babys crying right now.



You're only as good as your last departure.
User currently offlineFlying_steph From , joined Dec 1969, posts, RR:
Reply 6, posted (13 years 5 months 4 days 9 hours ago) and read 2225 times:

A dual stall warning system provides audible and tactile warnings of possible stall conditions of the aircraft. An auto slat extend system, controlled by the stall warning system, partially extends the outboard slats at onset of a stall warning.

To avoid an unnecessary rejected take-off due to a false stall warning just after initiation of rotation, the system remains inoperative for 5 seconds after nose-wheel lift-off.

2 angle-of-attack sensors are installed, one on each side of the forward fuselage area. They consist of an aerodynamic vane which positions a synchro. A heater is installed to provide anti-icing in flight.

Stall warning air/ground switches are located on the nose landing gear. They are provided to switch off the system on ground, except during test procedure.


Now take a look above the F/E panel...

Row B-13 you'll find the "AT/SC Stall warning 1" CB (it's on AC Bus 1), and row D-13 you'll find the "AT/SC Stall warning 2" CB (it's on AC Bus 3).

Then row C-17 you'll find the "Capt stick shaker" (DC Bus 1), and row E-17 the "F/O stick shaker" (DC Bus 3).


User currently offlineUAL Bagsmasher From United States of America, joined Sep 1999, 2146 posts, RR: 10
Reply 7, posted (13 years 5 months 4 days ago) and read 2181 times:

Thanks for all your answers!

User currently offlineOldman From United States of America, joined Sep 2006, 0 posts, RR: 0
Reply 8, posted (13 years 5 months 2 days 21 hours ago) and read 2143 times:

Mr. Bagsmasher, I have read several of your posts and it sounds like you are spending a lot of time in the cockpit when no one is around? The many questions you pose could be answered by your line maintenance dept. Are you permitted in the cockpit? Is it UAL policy to let other than Maintance or flight crews in and randomly flip switches and mess with circuit breakers? I'll bet against it, and suggest you reconsider less another person on the ranp be injured, or passengers & crew!

User currently offlineOldman From United States of America, joined Sep 2006, 0 posts, RR: 0
Reply 9, posted (13 years 5 months 2 days 21 hours ago) and read 2139 times:

Just wondering if I'm alone here or are there others that perhaps share my opinion. Just sounds like an accident waiting to happen.

User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3697 posts, RR: 34
Reply 10, posted (13 years 5 months 2 days 20 hours ago) and read 2129 times:
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Oldman,

My sentiments exactly, I was going to post something similar yesterday. However after looking at Bagmashers profile I couldn't be sure if he was authorised to be
carrying out what he does. You are right, he is going to kill or injure someone soon


User currently offlinePilot1113 From United States of America, joined Aug 1999, 2333 posts, RR: 12
Reply 11, posted (13 years 5 months 2 days 19 hours ago) and read 2127 times:

I have met (and am friends with) UAL_Bagsmasher and I can assure that you that he means no harm.

He is usually accompanied by a mechanic or a pilot from said company. I'm sure he was this time, but it wasn't said in his original post (as that wasn't the intent).

Now, isn't the F/E's responsibility to make sure that all circut breakers are in and, if they're not, placarded?

If he accidently left this breaker "poped" I'm sure that the F/E would notice this during the pre-flight and consult the maintenance manual and, upon finding nothing, pop it back in. No harm, no foul.

However, I do see your point. If someone with his credientals can gain this much access to a passenger aircraft what's to stop someone with a more sinister motive?

I'm not trying to start a war here, I'm mearly trying to defend my friend.

- Neil Harrison



User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3697 posts, RR: 34
Reply 12, posted (13 years 5 months 2 days 19 hours ago) and read 2120 times:
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The question isn't leaving a CB popped, but operating a a/c system unauthorised. It may be a small switch in the cockpit, but at the other end of the system it may be a control surface with 3000psi of hydraulic pressure behind it. People have quite literally lost a finger or even their head in such circumstances.

User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3697 posts, RR: 34
Reply 13, posted (13 years 5 months 2 days 18 hours ago) and read 2115 times:
Support Airliners.net - become a First Class Member!

Another point is, if UAL Bagsmasher was accompanied by a suitably qualified mech or pilot, he would not have to ask the question here. His chaperon would be able to answer.

User currently offlineCrjmech From United States of America, joined Jun 2000, 260 posts, RR: 1
Reply 14, posted (13 years 5 months 2 days 18 hours ago) and read 2110 times:

Though I am sure UAL Bagsmasher's intentions were purely benign, I gotta side with VC-10 and Oldman on this one. Under no circumstances should anyone be in the cockpit other than authorized personnel; i.e. flight crew or maintainence. If he was escorted by such a person, then O.K. If not, well let's just say that if I ever caught one of our rampers in the cockpit, there would be some........unpleasantness.


Thou shalt mind thine altitude,lest the ground reach up and smite thee.
User currently offlineOldman From United States of America, joined Sep 2006, 0 posts, RR: 0
Reply 15, posted (13 years 5 months 2 days 18 hours ago) and read 2113 times:

Mr Pilot 1113,
I understand, friendship is great but you cannot defend stupidity! Here is a man that admits to going into the cockpit and turning on the stall warning. Why? Has he gone to school on that aircraft and its systems? Would he recognize a good test vs. a failed test. Does he know what he is doing? Hell, might as well hit the starter and rotate #2 and see if it works or makes noise. Yes that is one of the duties of the F/E also the F/0 and the Buck stops with the man in the left seat. I can tell you from experience for example on a late nite aircraft change, everyone's a little tired and the company is pushing for on time departure. That being said, There are many C/B's that are "hidden" from view and could be missed by all three. Like someone said "S--T Happens". I don't want to make a "book" of this but as innocent as his intentions may be, he has admitted to being there alone. Should he get into trouble it is a very simple task for UAL and FBI to copy all in his c drive and use that against him. If he is a friend please tell him to be escorted by maintance foreman or line maint. Rep. Just one crew menber returning to retrieve a forgotten item and hearning bells and whistles goiing off will be grounds for immediate termination, and more. Don't be screwing around at ORD.
I cut this thing 3 times and it's still to long..Oldman


User currently offlineOldman From United States of America, joined Sep 2006, 0 posts, RR: 0
Reply 16, posted (13 years 5 months 2 days 18 hours ago) and read 2106 times:

After all that I forgot to ask that those of us that may be well informed about various systems perhaps should think twice about giving "to"much information. We could be talking to Sadam's friends in Iraq and how would we know..Food for thought..

User currently offlineLuckySevens From , joined Dec 1969, posts, RR:
Reply 17, posted (13 years 5 months 2 days 16 hours ago) and read 2103 times:

Oldman,
You can never be too sure! I suggest we delete the tech/ops forum entirely as it could be a breeding ground for anyone who aspires to be a pilot! Seriously, anywhere you are you should be careful about disclosing information, but think with all the information on the internet, there's probably more detailed DC10 schemas out there than on this board.  Big grin


User currently offlineUAL Bagsmasher From United States of America, joined Sep 1999, 2146 posts, RR: 10
Reply 18, posted (13 years 5 months 2 days 12 hours ago) and read 2104 times:

To calm everyone's fears.. YES..I did have an A&P with me. He hasn't worked on the DC-10 in severeal years, so he was rusty as to where the breaker(s) was. I am always with a mechanic anytime I touch something up there. I'd be afraid not to.

User currently offlineUAL Bagsmasher From United States of America, joined Sep 1999, 2146 posts, RR: 10
Reply 19, posted (13 years 5 months 2 days 12 hours ago) and read 2098 times:

Many of the technical questions I ask on this forum are from things I have seen or heard at work. My previous question on this forum was about the B727 F/E panel and the guage fluctuating. I asked a mechanic, who wasn't 100% sure. He guessed it was the battery charging, which turned out to be correct. I then came to Airliners.net where I knew there would be someone who would be able to tell me for sure. Last time I checked, there was nothing in the rules about observing instruments in a cockpit.
Never have I or will I operate any device in a cockpit without a mechanic present who gives me permission to do so. Once I was allowed to tune the ADF to a local radio station after I asked a mechanic how the device worked. He explained the basic functions and showed me how pilots sometimes tune into ball games for passengers. We dialed up a local news station to demonstate how it worked.
Never have I, or will I operate anything without permission and supervision. I am not that dumb. I have not and would not mess with anything I know nothing about. I have never and would never compromise the safety of our passengers and crews. I have not and will not jeopardize my job for the sake of playing around. I hope I have made myself clear. I appreciate the concern many of you have shown about safety. It says a lot about your charecter Smile


User currently offlineArchie Bunker From United States of America, joined Jul 2000, 401 posts, RR: 0
Reply 20, posted (13 years 5 months 2 days 11 hours ago) and read 2087 times:

No wonder why I have to wait almost an hour to claim my baggage at ORD. The rampers are in the cockpit instead of the cargohold. Big grin

User currently offlineUAL Bagsmasher From United States of America, joined Sep 1999, 2146 posts, RR: 10
Reply 21, posted (13 years 5 months 2 days 11 hours ago) and read 2088 times:

I didn't hear that Big grin

User currently offlineFlying_steph From , joined Dec 1969, posts, RR:
Reply 22, posted (13 years 5 months 2 days 6 hours ago) and read 2076 times:

I agree that everybody should be carefull when disclosing information and sharing his/her knowledge on the Internet...
But regarding aircraft systems and operation, don't forget that a full set of manuals (systems, performance, procedures, etc.) is in every cockpit.
Errr... Well, I hope so !  Big grin

If the guy has access to the cockpit, he has access to everything.


User currently offlineOldman From United States of America, joined Sep 2006, 0 posts, RR: 0
Reply 23, posted (13 years 5 months 2 days 5 hours ago) and read 2085 times:

Ok Mr. Bagsmasher. I have read your post 02-23-07:15 and I like what I heard. Thanks for explaining to me that you are always with someone qualified. It was not my attempt to stir up a hornet's nest, just don't want anyone to be injured. And to all others, perhaps we should but this one in the hangar and not whip a dead horse any more? Nuff Said.
Lets all be safe out there! Smile


User currently offlineAA737-823 From United States of America, joined Mar 2000, 5722 posts, RR: 11
Reply 24, posted (13 years 5 months 1 day 16 hours ago) and read 2069 times:

Oh my gosh, you people make me sick. This is not the spirit of this forum. You are accusing someone of being Saddam Heussein? How ludacrous is that? Okay, let's say this guy is Quadaffi's vile henchman. What is he going to gain by knowing HOW TO TEST THE FRIGGIN' STALL WARNING SYSTEM? Oh my gosh, you folks need a life. Go make sure someone else is doing their job. This forum is not a hideout for big brother. Or did you go far enough in your formal education to know who Big Brother is? Those of us that are trying to learn here have little tolerance for paranoia.

I suggest you take your paranoia elsewhere.

Don't touch the stall test, little boy, you might kill someone. Please, give me a break.


25 Post contains images Dcy : > ... spirit of this forum. You are accusing someone of > being Saddam Heussein? Saddam Hussein. > How ludacrous is that? Ludicrous. > Okay, let's say
26 AA737-823 : I dun't give a whoot how you'r wantin ta spell it, I thank we all got thu pictur. At least you agreed with me on most of it. I apologize for my spelli
27 Post contains images UAL Bagsmasher : Thanks JETPILOT...Finally someone sees where I'm coming from
28 VC-10 : AA737-823 Stop acting like a 5 year old & read the posts again. Nobody was suggesting UAL_Bagsmasher was a terrorist or has any terrorist links. His s
29 Cedarjet : It's ridiculous to think Saddam or Bin Laden or whoever would need to look on the internet, let alone a discussion forum, to find technical info for a
30 VC-10 : The Afghan DC-10 left Afghanistan in March 1983, I know, because I was on it !
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