When ATC refers to "normal speed" is that in reference to speeding up or slowing down to maintain the airpeed in your flight plan depending on what ATC had previosly asked? For example you were slowed for traffic and the other aircraft is now out of the way.
The other day on ch 9 I heard a pilot of a UA flight tell ATC he had a TCAS warning and that they were climbing.
1. How rare are TCAS warnings?
2. Do you always climb?
3. Is it possible two planes get the warning and both climb, possibly making the situation worse?
As someone pointed out, please read that other thread to see if it answers your question. If not, ask your question again here. Also, there are good web pages on TCAS if you just search TCAS.
Quote:
Originally Posted by AFJon
When ATC refers to "normal speed" is that in reference to speeding up or slowing down to maintain the airpeed in your flight plan depending on what ATC had previosly asked? For example you were slowed for traffic and the other aircraft is now out of the way.
They are talking about returning to our flight plan filed airspeed, or the airspeed we were at when they changed us. This happens with ATC speeds us up or slows us down to help with their spacing with traffic. After they have that spacing, they tell us they don't need the exact airspeed they gave us, we can go back to our previous speed.
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As far as I know, UA doesn't have any A330s,... but maybe you know the answer anyway...?!:
Sitting in a AC A330 the other day, during slow stop-start taxiing, I was sat near approximately level with where the leading edge of the wings joins the fuselage. Quite a few times (mostly starting and stopping?) there was what seemed like a loud clunking coming from below - fairly heavy duty mechanical-sounding....
As far as I know, UA doesn't have any A330s,... but maybe you know the answer anyway...?!:
Sitting in a AC A330 the other day, during slow stop-start taxiing, I was sat near approximately level with where the leading edge of the wings joins the fuselage. Quite a few times (mostly starting and stopping?) there was what seemed like a loud clunking coming from below - fairly heavy duty mechanical-sounding....
Any ideas what it was?
I have heard this noise too - I think this is the wheel brakes engaging.
Well, the unions will make it tough, and rightfully so, since it's our jobs. Look what happened when United was able to get E170's on property. Within a couple years they sat down the entire 737 fleet and cost 1450 pilot jobs at United Mainline. If United wanted to buy these planes and fly them, that would be an easy sell, but to let others buy them and fly them for United, that is a no go. So, the union rightfully fights them on that.
Hi AD, leaving politics (although I understand their importance) and patriotism aside is there any sort of general feeling amongst you pilots as to which is the better aircraft amongst 737s, a319/20s, E170/190s and the new larger Bombardier? I know the answer to this question will be complex as there will always be an element of personal preference, and different aircraft will have different merits but from the pilots point of view do you think there is a general preference for any one of them?
Thx, SF.
As far as I know, UA doesn't have any A330s,... but maybe you know the answer anyway...?!:
Sitting in a AC A330 the other day, during slow stop-start taxiing, I was sat near approximately level with where the leading edge of the wings joins the fuselage. Quite a few times (mostly starting and stopping?) there was what seemed like a loud clunking coming from below - fairly heavy duty mechanical-sounding....
Any ideas what it was?
If it was just the clunking as you stopped and started again, then I would say it was the parking brake being applied to hot brakes as you stopped, then released as you started again. If it was a constant barking dog sound, that is the hydraulic power transfer unit running.
Quote:
Originally Posted by ScottieFlyer
Hi AD, leaving politics (although I understand their importance) and patriotism aside is there any sort of general feeling amongst you pilots as to which is the better aircraft amongst 737s, a319/20s, E170/190s and the new larger Bombardier? I know the answer to this question will be complex as there will always be an element of personal preference, and different aircraft will have different merits but from the pilots point of view do you think there is a general preference for any one of them?
Thx, SF.
I've only flown the 737 and Airbus, and I can only offer my opinion, but I preferred the Airbus. Much nicer jet to fly. I've always flown Boeings and I like them, but Airbus makes a more comfortable plane. I've never flown the Embraers or Bombardier's, other than as a passenger, so I can't really comment on which is better. It does appear the Embraers hold up better than the CRJ's, but I really have no data to go off of that, just my passenger experience every now and then.
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I have kind if an odd question for you, but...do you guys have any habits or do anything unique while flying? (I'll give you an example what I mean )
I just got off two UA flight, SFO-LAX and IAD-SFO, 757 and 767. On the first flight, the pilot working the radios did the same thing after contacting a new frequency. He would add "Airlines" to the callsign. Every transmission to a new controller went word for word like this, "[whomever], this is United Airlines xxx, [altitude]. On ALL of the other transmission, no mention of "Airlines". It was clear this is the way he wanted to do it.
On the other flight, a different pilot did the same sort of thing...he would NEVER read back the handoff. Every handoff was responded, "Okay, have a great day, United 874." He would readback at every other time and place, but NEVER for a handoff (maybe it's not required. When you think about, all the controllers may have thought he just forgot that one time, they only get to do the handoff once ).
So I guess I have two questions. Are the two "alterations" above "legal", fo lack of a better word?
I have kind if an odd question for you, but...do you guys have any habits or do anything unique while flying? (I'll give you an example what I mean )
I just got off two UA flight, SFO-LAX and IAD-SFO, 757 and 767. On the first flight, the pilot working the radios did the same thing after contacting a new frequency. He would add "Airlines" to the callsign. Every transmission to a new controller went word for word like this, "[whomever], this is United Airlines xxx, [altitude]. On ALL of the other transmission, no mention of "Airlines". It was clear this is the way he wanted to do it.
On the other flight, a different pilot did the same sort of thing...he would NEVER read back the handoff. Every handoff was responded, "Okay, have a great day, United 874." He would readback at every other time and place, but NEVER for a handoff (maybe it's not required. When you think about, all the controllers may have thought he just forgot that one time, they only get to do the handoff once ).
So I guess I have two questions. Are the two "alterations" above "legal", fo lack of a better word?
And, do you do anything like the above?
Yep, they are legal. When you check in with a new controller, you are supposed to say airline number and altitude checking in at, and any other special info, say on a vector or non-RVSM, something like that. You are only required to read back headings, altitudes and airspeeds or add a "lifeguard" or "emergency" callsign if you are using one. So, when they send you out to another freq, as long as you reply with your call-sign, anything else you add is just your stuff.
I don't add anything new, I keep it short and to the point, probably my former military background where radio brevity was the norm. Send me to a new freq, I just reply "125.75, United XX" and I'm done. If the controller wishes me a good day, I'll reply in kind. That's about it.
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Yesterday I flew DEN-LAS on UA715, an A320 (Ted model). We had a lot of diversions due to weather, Ch. 9 was on an everyone was looking for something other than their assigned course.
About 10 minutes into the flight we experienced something in my over 1 million miles I have never felt/heard before. The plane seemed to actually kick back, as though we were moving in reverse and there was a signficant sense of floating in air and a sound I can only describe as a wailing sound came from the wings. The sound was noteworthy to me beause I had my Bose noise cancelling headphones on. This repeated itself about 10 seconds later. The sound lasted for 5-7 seconds. I was in Row 5, for reference to the relative placement of myself to the wings. This wailing sound, I thought was the sound of air passing against the underside of the wings, as if we were falling - and there was significant upward pressure against the underside of the wing surface. I can't say that's what really happened and the pilots didn't have their door open when it was time to deplane so I couldn't ask them.
Of note, on Channel 9 I heard an aircraft report some "wave activity" and a loss of 600 feet of altitute to the controller. Seems to me that's a significant amount of altitude when we're dealing with 1000' of horizontal separation these days.
Any possible thoughts on what this might have been? I don't imagine it's even possible for the plane to actually go in reverse, but the sensation of floating and not moving was enough to silence the cabin and have everyone looking around trying to figure things out.
Of note, on Channel 9 I heard an aircraft report some "wave activity" and a loss of 600 feet of altitute to the controller. Seems to me that's a significant amount of altitude when we're dealing with 1000' of horizontal separation these days.
You can search this thread for the term "mountain wave" to answer the wave part of your question -- it may answer the entire thing, I don't know.
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Thanks. I was referencing what I heard on Ch 9 by another pilot as an indication of what was going on in the area but my main question is what does the experience we had on our flight suggest as the cause and more specifically the unique sound from behind me/wing area?
Thanks. I was referencing what I heard on Ch 9 by another pilot as an indication of what was going on in the area but my main question is what does the experience we had on our flight suggest as the cause and more specifically the unique sound from behind me/wing area?
Did you read the post I referenced and the others in that area of the thread? You should
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Yes, I did. Did I miss something that explicitly addressed the sounds I heard on the flight? And, I'd like one of our resident A320 captains to chime in if possible?
"Clunking" noises from the hold during taxi?
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