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(PDF) Irish report for United 757 incident on approach to Dublin
While descending in or near turbulence, first officer airspeed became unreliable. FO twice initiated a high altitude stall recovery, which led to injuries and aircraft damage, before the captain took over with an operable airspeed indicator. (www.aaiu.ie) 기타...Sort type: [Top] [Newest]
A similar thing happened to me one time, many moons ago. I was an FO on a King Air 90 with steam gauges, and the Captain was flying. I was calling out the numbers as we were climbing out, when all of a sudden my airspeed indicator started dropping. It slowly dropped from about 140 to 80 in a matter of about 6 or 7 seconds, and I was calling out the numbers in increments of 10. At 90 I became concerned, and at 80 my instinct was to reach up and push the yoke. I looked over simultaneously as my hands started moving, and immediately noticed that the left indicator was still at 140. Afterwards the Captain commended me for both reacting and for cross checking. Turns out that the nut for the pitot/static drain system (which is on the right side panel near your feet) had come loose and had created a leak in the right side system.
It is easy to second guess after the fact, however, there appears to have been a rather serious lack of CRM and communication. The CAPT believes the rapid descent was due to turbulence and the FO continues to rely on his IAS indication even after the CAPT informs him that his and the standby indications are in agreement.
In the decades before digital engine controllers (automotive) most problems were mechanical, most people could understand and even fix them. Nowadays we open the hood of our cars, look at miles of plastic, shrug, close the hood.
It seems to me something similar is happening in commercial aviation, at least the training and experience end of it. IOW, too much silicon is doing too much of the thinking, which leads to over-reliance, apathy, and a general lack of involvement.
Then, again, without being there it's easy for me to armchair my comments. Glad this ended well.
It seems to me something similar is happening in commercial aviation, at least the training and experience end of it. IOW, too much silicon is doing too much of the thinking, which leads to over-reliance, apathy, and a general lack of involvement.
Then, again, without being there it's easy for me to armchair my comments. Glad this ended well.
I don't know if you are implying it but I think it's safe to say a large majority of pilots prefer glass to the old analog instruments. Your situational awareness is so much better with glass both from the presentation and the automation, and the mechanical instruments malfunctioned and at much higher rate than the modern ones.
As to cars, yes they aren't as simple as they used to be, but they're not that bad... fuel pump, filter, regulator, rails, injectors... air cleaner, throttle body, plenum... MAP/MAF sensor, O2 sensors. The OBD II usually gives you a pretty good idea where to look. Carbureted engines with mechanical distributors were simpler but quite a bit less efficient, more pollute-y and needed more frequent maintenance (plugs, points, condenser, etc). The ethanol in modern US gas is hard on carbs, too.
As to cars, yes they aren't as simple as they used to be, but they're not that bad... fuel pump, filter, regulator, rails, injectors... air cleaner, throttle body, plenum... MAP/MAF sensor, O2 sensors. The OBD II usually gives you a pretty good idea where to look. Carbureted engines with mechanical distributors were simpler but quite a bit less efficient, more pollute-y and needed more frequent maintenance (plugs, points, condenser, etc). The ethanol in modern US gas is hard on carbs, too.
With current car technology, if you are willing to invest $3-400 in an OBDII scanner, the car will tell you what is wrong with it and will suggest items to inspect/repair.
you sure nailed me: old school, I am <grin>
I agree with you, the awareness is enhanced. but i question if the average modern aviator commands all that goodness?
I agree with you, the awareness is enhanced. but i question if the average modern aviator commands all that goodness?