TM 55-1510-219-10 5. Altimeters-Check.      Verify   that   altimeter setting    complies    with    transition    altitude requirement. 6. Engine instrument indications-Noted. Check  all  engine  instruments  for  normal indications    and    record    on    appropriate forms for use in engine trend monitoring. 7. Recognition lights-As required. 8-38.  DESCENT. Descent from cruising altitude should normally be made  by  letting  down  a  cruise  airspeed  with  reduced power. 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. Power levers-IDLE. 2. Propeller levers-HIGH RPM. 3. Flaps-UP. 4. Gear-UP. 5. Airspeed-V_mo. 6. 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. 7. Ice & rain switches-As required. 8. Recognition lights-As required. b. Descent-Max  Rate  (Landing  Configuration).    If required to descend at a low airspeed (e.g., to conserve airspace  or  in  turbulence),  approach  flaps  and  landing gear may be extended to increase the rate and angle of descent   while   maintaining   the   slower   airspeed.      To perform    the    maximum    rate    of    descent    in    landing configuration, perform the following: 1. Power levers-IDLE. 2. Propeller levers-HIGH RPM. 3. Flap switch-APPROACH. 4. Gear switch-DN. 5. Airspeed-184 KIAS maximum. 6. Cabin  pressurization-Set.    Adjust  CABIN CONTROLLER dial as required and adjust   RATE   control   knob   so   that   cabin descent     rate     equals     one-third     aircraft descent rate. 7. Ice and rain switches-As required. 8. Recognition lights- As required 8-39.  DESCENT-ARRIVAL Perform   the   following   checks   prior   to   the   final descent for landing. 1. Cabin  pressurization-Set.    Adjust  CABIN CONTROLIER dial as required. 2. Ice & rain switches-As required. (3.) Windshield anti-ice-As required. NOTE Set  windshield  anti-ice  to  normal or   high   as   required   well   before descent   into   icing   conditions   or into    warm    moist    air    to    aid    in defogging.      Turn   off   windshield anti-ice when descent is completed  to  lower  altitudes  and when heating is no longer required.          This     will     preclude possible wind screen distortions. 4. Lights-ON. 5. Altimeters-Set to current altimeter setting. 6. ASE-As required. 8-40.  BEFORE LANDING. 1. Prop sync switch-OFF. 2. Autofeather switch-ARM. 3. Propeller levers-As required. NOTE During approach, propellers should   be   set   at   1900   RPM   to prevent     glideslope     interference (ILS     approach),     provide     better power response during approach, and     minimize     attitude     change when  advancing  propeller  levers for landing. 4. Flap switch (below 202 KIAS)- APPROACH. 5. Gear switch (below 184 KIAS)-DN. 6. Rotating boom dipole antenna-Check stowed. 7. Landing lights-As required. 8. Brake deice-As required. 8-41.  LANDING. Performance data charts for landing computations assume    that    the    runway    is    paved,    level    and    dry. Additional runway must be allowed when these conditions  are  not  met  Refer  to  Chapter  7  for  landing data.          Do     not     consider     headwind     during     landing computations;     however,     if     landing     must     be     down 8-18  Change 1