fdr wrote on pprune (https://www.pprune.org/rumours-news/614857-indonesian-aircraft-missing-off-jakarta-3.html#53 https://www.pprune.org/rumours-news/614857-ind

fdr wrote on pprune (https://www.pprune.org/rumours-news/614857-indonesian-aircraft-missing-off-jakarta-3.html#53 https://www.pprune.org/rumours-news/614857-indonesian-aircra...) """ Hmmm. ADC/Pitot or load.... P/S, Pitot main issue (alt is more stable than speed > static is OK). Maybe. OK, the DFDR will be telling, probably as much as the CVR. This plane was in distress from 300' AMSL, and has every indication of a longitudinal stability issue, e.g., stick force gradient deal. Immediately, forget about directional issues, this isnt an engine, TR, asymmetric slat, flap or other issue, look closely at the loadsheet, and the load control. The ADSB data is indicating an aircraft with negligible static stability, and that points towards a loading error, with a CG near neutral point. Should you ever have that happen, it is not fun; helicopter pilots get laughed at as that is what they are used to every day, which is why they are generally odd people. If you have an AP, the plane will do better on AP often than a driver at the wheel. If you have flaps, get the TE flaps out, or all flaps the Cp is shifted aft. Don't go to altitude, don't burn CWT gas, move pax fwd if needs be, but mainly, be very careful with your flight control inputs, planes that are unstable are fun to fly for very short times. Do not go fast, unless you have an ejector seat. As an AAI I normally would suggest awaiting data release before sprouting comment pointedly, but this is already shown in the data. Forget suicide etc, this plane had pitch instability from the get go. I have investigated a number of aircraft loading events, and have also been on the receiving end of 2 of my very own. Have sympathy for the poor flight crew, unless they were form a flight test background it is unreasonable to critique their performance. Could an airline train crews to deal with load errors? I can say that is possible, in fact it is not even hard, and last count, I had investigated over a dozen events... need to dust off the confuser for an exact number, but I can recall 12 offhand. Will airlines train crew to handle such cases? highly unlikely, the industry is not after competency above that mandated by the regulator. Load error, possible Pitot. sad day. """