TM 1-1510-218-10 8-20 where maximum power cannot be maintained.  Refer to  Chapter  7  for  rate  of-climb  airspeed  for  specific weights. 1.   YD switch – As required. 2.   Cabin    pressurization    –    Check.        Adjust RATE  control  knob  so  that  cabin  rate-of- climb equals one-third aircraft rate-of-climb. 3.   AUTOFEATHER switch – As required. 4.   BRAKE DEICE – As required. NOTE Turn   the   windshield   heat   on   to NORMAL  when  passing  10,000  feet MSL or prior to entering the freezing level, whichever comes first.  Leave on  until  no  longer  required  during descent for landing. HIGH temperature   may   be   selected   as required  after  a  minimum  warmup period of 15 minutes. 5.   WSHLD ANTI-ICE – As required. 6.   Wings and nacelles – Check. O 7.   TCAS – Set range. 8-36.  CRUISE. Cruise   power   settings   are   entirely   dependent upon  the  prevailing  circumstances  and   the   type  of mission being flown.  Refer to Chapter 7 for airspeed, power   settings,   and   fuel   flow    information.      The following   procedures   are   applicable   to   all   cruise requirements. 1.   Power  –  Set.    Refer  to  the  cruise  power graphs contained in Chapter 7.  To account for   ram   air   temperature   increase,   it    is essential  that  temperature  be  obtained  at stabilized   cruise   airspeed.      Power   is   set using   RPM   and   torque   as   the   primary control.    Maximum  allowable  torque  must not  be  exceeded  and  TGT  must  also  be observed as a separate limit. NOTE A new engine operated at the torque value presented  in  the  cruise  power  charts  will show  a  TGT  margin  below  the  maximum cruise limit for the torque value presented in  the  charts.    With  ice  vanes  retracted,  if cruise torque settings shown on the cruise power  charts  cannot  be  obtained  without exceeding TGT limits, the engine should be inspected. 2.   ICE   &   RAIN    switches    –    As    required. Ensure  that  anti-ice  equipment  is  activated before entering icing conditions. NOTE Ice    vanes    must    be    extended    when operating  in  visible  moisture  at  +5  °C  or less.      Visible   moisture   is   any   form   of clouds, ice crystals, snow, rain, sleet, hail, or any combination of these. 3.   CABIN SIGNS switch – As required. 4.   AUXILIARY fuel gauges – Monitor.  Ensure that  fuel  is  being  transferred  from  auxiliary tanks.  (Chapter 2, Section IV.) 5.   Altimeters  –  Check.    Verify  that  altimeter setting    complies    with    transition    altitude requirement. 6.   Engine    instrument    indications    –    Noted. Check   all   engine   instruments   for   normal indications. 7.   RECOG lights – As required. O 8.   TCAS – Set for en route. 8-37.  DESCENT. Descent  from  cruising  altitude  should  normally be   made   by   letting   down   at   cruise   airspeed   with reduced power.  Refer to Chapter 7 for power settings and rates of descent. NOTE Cabin    pressure    controller    should    be adjusted prior to starting descent. a.    DESCENT – Max Rate (Clean). To obtain the  maximum  rate  of  descent  in  clean  configuration, perform the following. 1.   Cabin  pressurization  –  Set.    Adjust  CABIN CONTROLLER dial as  required  and  adjust RATE  control  knob  so  that  cabin  rate  of descent   equals   one-third   aircraft   rate   of descent.