737 in a catapult

[chumley 0]

Hi DamianJust commenced a flight at Denpasar. On take off with a fully laden 737 and climb out I had the misfortune to come across a situation that nearly resulted in a total loss.The air speed decayed rapidly to a stall situation from which I barely recovered. Got the aircraft climbing when at around 17000 feet the aircraft was catapulted to 47000 in the blink of an eye. I noticed the baro was showing 27.99in so I hit the B key and it immediately reverted to 0.00in and the alt around 9000 feet from memory.I am now at cruise 37000 feet with 27.99in on the baro. When I try to set STD it catapults me up to 38880 feet and the aircraft starts to descend - pressing B shows 0.00in.The actual weather (AS2004)is showing a baro of 1007.There are no winds showing on the panel.I have just closed AS2004 and restarted with the result that the aircraft is now at a tad over 5000 feet with a baro of 27.99in and is climbing to FL370 and I now have winds.Sorry about the garbled state of this report but I am typing it as I try tweaks to see what is going on.When I reach FL180 I will press B and set STD and I predict my altitude will skyrocket. (Wrong!! Set as 29.92 then STD)Seems to be progressing normally now.Andy BEdit: Spoke too soon - weather changed - aircraft acelerated at Warp factor XX to 550knots and altitude to FL480.Now a STALL - airspeed NIL lost 16,000 feet before recovery.

[chumley 0]

A final comment.This 2.7 hour flight has been plagued with abrupt airspeed and altitude changes non of which were commanded.They are solely weather related and can (I think) be attributed to a pressure bug of some description as it appears to be this which throws the aircraft around.Oh yes, for good measure - with PITOT Heat - ON and other anti icing devices also ON I noticed a sudden decay in airspeed during descent. I pressed Shift-H and immediately airspeed was restored to the expected value.My flight ended 2 miles short of my destination after the weather changed suddenly and ploughed me into the ground.NOT HAPPY JAN!!!!Andy bJust a thought - is there any signifcance in the fact that this is the first flight I have had in about a dozen or more where I have experienced these problems and it is the first flight where Cruise Altitude has been set at greater than FL330?

[Guest hnorgaar]

HiI had the exact same situation with the PMDG 737 taking of from Phuket to Bangkok, around 17000 feet and maybe when I changed my barometer to STD, same story. Maybe PMDG, FSUIPC 3.135, AS2004 or AsiaHenrik Norgaard

[chumley 0]

G'day HenrikWhat was your proposed cruise altitude for the VTSP - VTBD flight?Since purchasing AS2004 I have flown exclusively in SE Asia. Having slept on the problem overnight (it's morning here in Australia) I'm strongly favouring the cruise altitude strange a proposition as it might sound.Every other flight was executed in the same manner and each of them resulted in a satisfactory conclusion - wake turbulance excepted. Apart from a fully laden aircraft (other flights were lightly configured) and cruise exceeding FL330 (and of course different weather conditions) nothing really changed.Later today I will do a test flight out of Denpasar with FL330 or lower selected and an empty aircraft and see how that goes.RegardsAndy B

[Guest hnorgaar]

Hi againWell for this flight which is the only time I have seen it except for one time on