TM 55-1510-220-10 (4) Battery switch (landing gear/flap extension only) ON. 9-23.  EMERGENCY DESCENT. Emergency  descent  is  a  maximum  effort  in  which damage to the aircraft must be considered secondary to getting   the   aircraft   down.      The   following   procedure assumes   the   structural   integrity   of   the   aircraft   and smooth   flight   conditions.      If   structural   integrity   is   in doubt,  limit  speed  as  much  as  possible,  reduce  rate  of descent   if   necessary,   and   avoid   high   maneuvering loads.  For emergency descent, perform the following: NOTE Windshield defogging may be required. 1.    Power lever IDLE. 2.    Propeller lever HIGH RPM. 3.    Flaps APPROACH. 4.    Gear - DN. 5.    Airspeed 184 KIAS maximum. 9-24.  LANDING EMERGENCIES. WARNING Structural  damage  may  exist  after  landing with brake, tire, or landing gear malfunctions.      Under   no   circumstances shall  an  attempt  be  made  to  inspect  the aircraft until jacks have been installed. a.  Landing Gear Unsafe Indication.  Should one or more of  the  three  green  landing  gear  indicator  lights  fail  to indicate  a  safe  condition,  the  following  steps  should  be taken before proceeding to extend the gear manually. 1. Gear - DN. 2. Gear lights Check (three green). (3) Landing   gear   relay   and   indicator   circuit breaker Check In. NOTE If     gear     continues     to     indicate     unsafe, attempt   to   verify   position   of   the   landing gear visually. b. Landing Gear Emergency Extension. CAUTION Continued   pumping   of   the   handle   after GEAR  DOWN  position  indicator  lights  (3) are   illuminated   could   damage   the   drive mechanism,  and  prevent  subsequent  gear retraction. CAUTION After an emergency landing gear extension has   been   made,   do   not   stow   the   gear ratchet  handle  or  move  any  landing  gear controls  or  reset  any  switches  or  circuit breakers until the cause of the malfunction has been corrected. 1. Airspeed 130 KIAS. (2) LANDING  GEAR  RELAY  circuit  breaker Out. 3. Gear - DN. 4. Landing gear alternate engage handle Lift and turn clockwise to the stop. 5. Alternate   landing   gear   extension   handle Pump. 6. Gear lights Check (three green). c. Gear-up   Landing   (All   Gear   Up   or   Unlocked). Due  to  decreased  drag  with  the  gear  up,  the  tendency will be to overshoot the approach.  The center-of-gravity with  the  gear  retracted  is  aft  of  the  main  wheels.    This condition  will  allow  the  aircraft  to  be  landed  with  the gear  retracted  and  should  result  in  a  minimum  amount of structural damage to the aircraft, providing the wings are kept level.  It is recommended that the fuel load be reduced and the landing made with flaps fully extended on  a  hard  surface  runway.    Landing  on  soft  ground  or dirt  is  not  recommended  as  sod  has  a  tendency  to  roll up into chunks, damaging the underside of the aircraft's structure.    When  fuel  load  has  been  reduced,  prepare for a gear-up landing as follows: 9-13