Straight copy from my company's QRH.
Emergency Descent <>
Condition: One or more of these occur: •Cabin pressure cannot be controlled when the airplane is above 14,000 feet •A rapid descent is needed.
1 Announce the emergency descent. PF will announce "CABIN CREW RAPID DESCENT, RAPID DESCENT" on the PA. The PM will set 7700 on the transponder, advise ATC and obtain the area altimeter setting.
2 Passenger signs . . . . . . . . . . . . . . . . . . . . . . ON
3 Without delay, descend to the lowest safe altitude, or 10,000 feet, whichever is higher.
4 ENGINE START switches (both) . . . . . . . . . CONT
5 Thrust levers (both) . . . . . . . . . Reduce thrust to minimum or as needed for anti-ice
Autopilot and autothrottle should remain engaged.
6 Speedbrake . . . . . . . . . . . . . . . .FLIGHT DETENT
- - - - - - - - - - - - - - - - - - - - - - -
If structural integrity is in doubt, limit speed as much as possible and avoid high maneuvering loads.
7 Set target speed to Mmo/Vmo.
8 When approaching the level off altitude:
Smoothly lower the SPEED BRAKE lever to the DOWN detent and level off. Add thrust and stabilize on altitude and airspeed.
9 Crew oxygen regulators . . . . . . . . . . . . . Normal
Flight crew must use oxygen when cabin altitude is above 10,000 feet. To conserve oxygen, move the regulator to Normal.
10 ENGINE START switches (both) . . . . . .As needed
11 The new course of action is based on weather, oxygen, fuel remaining and available airports. Use of long range cruise may be needed.
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Interesting point from RAT5, the TCAS we have has above and below, while in the cruise it is set to below, give us the ability to see down 6500'ish,
Will be something I will put to the fleet office for their reason not to set TA only.