Hey guys/gals,

I'm trying to find the Part 25 certification requirements for turbine powered transport category aircraft in regard to emergency descent requirements. Isn't there a time limit involved in descending to a more favorable altitude where we can all breath? ( I think it's 14k, right? )

The reason I'm asking is because I fly overseas and some of the instructors over here think that to meet the international RVSM requirements for an emergency descent ( turn 30 degress right, fly 20km which is basically a 12nm offset, parallel your original course, and then return to your course when able...where I fly anyway) you must actually fly the 20km at altitude.

I maintain that if I have a decompression requiring air to breath I'm going to direct the pointy end of my jet toward earth and descend while I'm offseting ( as the rvsm procedure allows ) Or am I overreacting? About 2 minutes to offset and then maybe 5 minutes for a high speed descent from max cruise ceiling is within the oxygen limits. Not sure how much longer a descent at failure speed would take in a fuselage damage situation. Haven't done one of those lately.

Anyway, does anyone know what the time limit is for certification?
Anyone,
Anyone,
Bueller??

Any help is greatly appreciated.