August 23, 201114 yr In an actual aircraft, when the "odd man out" altimeter reads significantly lower than the other two, this would indicate either a malfunctioning ADIRU, or a blockage in the associated static system. (A blocked pitot tube would affect primarily airspeed). If it happens only when the aircraft is pressurized, it would indicate that there is a leak in the static line at some point within the pressurized part of the fuselage. (In either case the associated airspeed indicator would read low too). Either PMDG has implemented a blockage/leakage failure mode for the pitot-static system, (or ADIRU which has lost its calibration), or there is something corrupted in your installation. If you've tried clearing all failures without success, then it's probably the latter... Jim BarrettLicensed Airframe & Powerplant Mechanic, Avionics, Electrical & Air Data Systems Specialist. Qualified on: Falcon 900, CRJ-200, Dornier 328-100, Hawker 850XP and 1000, Lear 35, 45, 55 and 60, Gulfstream IV and 550, Embraer 135, Beech Premiere and 400A, MD-80.
August 23, 201114 yr Is your settings on FSX set to "US metric systems"? If not, try that and make sure your Display Control Panel is "NORMAL".
August 23, 201114 yr Pete, Sorry about the "read the manual" advice, just can't tell somebody's experience easily (especially when using an iphone!). Sounds like most option have been covered, maybe a fresh install or a support ticket is in order? I take it that you switched off service based failures in an attempt to localize the problem? Also did you go through all the failure /maint options, including FSX? You probably have, I can't think what it is...... Dan.
August 23, 201114 yr Which of the altimeters is closest to field elevation when set to QNH? I forgot to ask, because you might actually be within limitations, at which phase of a flight are you when you find the difference?The allowed inflight difference for RVSM between CAPT and FO is 200ft. Omar Josef 737/757/767
August 23, 201114 yr According to the OP the difference was between 50 and 220ft. This varied with the pressure.
August 23, 201114 yr As already mentioned I think this is the altimeter settings in FSX. There are 3 options, check them out. Happened to me already. If it is a simulated fault, you can go into the PMDG menu and see which faults are current. But I dont think there will be any..
August 23, 201114 yr x3, as mentioned...Is your settings on FSX set to "US metric systems"? If not, try that and make sure your Display Control Panel is "NORMAL".
August 23, 201114 yr Author Brayton and Ian Just checked the settings in FSX and you're absolutely on the money. As soon as I changed to Hybrid or US ft and inches it came back to 'normal' supply across the board.Must admit I don't know how it came to be in metric but it sure as heck aint now. Many thanks to all contributors,and as my first time on ANY forum I am really impressed with the help offered. Pete
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