TM 55-1510-219-10 d. Landing With Nose Gear Unsafe.  If the LDG GEAR  CONTROL  warning  light  is  illuminated  and the   nose   GEAR   DOWN   LIGHT   shows   an   unsafe condition, the nose gear is probably not locked down, and the gear position should be checked visually by another aircraft, if possible.  If all attempts to lock the nose  gear  fail,  a  landing  should  be  made  with  the main  gear  down  and  locked.    Hold  the  nose  off  the runway  as  long  as  possible  and  do  not  use  brakes. Use the following procedures: 1. Crew emergency briefing Complete. 2. Loose equipment Stowed. 3. Bleed air valves ENVIRO OFF. 4. Cabin pressure switch DUMP. 5. Cabin  emergency  hatch  Remove  and stow. 6. Seat belts and harnesses Secured. 7. Nonessential electrical equipment OFF. NOTE Fly     a     normal     approach     to touchdown.          After     landing, accomplish the following: 8. Condition levers FUEL CUTOFF. 9. Fire pull handle Pull. 10. Master switch OFF. e. Landing With One Main Gear Unsafe.  If one main  landing  gear  fails  to  extend,  retract  the  other gear  and  make  a  gear-up  landing.    If  all  efforts  to retract  the  extended  gear  fail,  land  the  aircraft  on  a hard  runway  surface,  touching  down  on  the  same edge  of  the  runway  as  the  extended  gear.    Roll  on the down and locked gear, holding the opposite wing up and the nose gear straight as long as possible.  If the  gear  has  extended,  but  is  unsafe,  apply  brakes lightly   on   the   unsafe   side   to   assist   in   locking   the gear.  If the gear has not extended or does not lock, allow the wing to lower slowly to the runway.  Use the following procedures: 1. Crew emergency briefing Complete. 2. Loose equipment Stowed. 3. Bleed air valves ENVIRO OFF. 4. Cabin pressure switch DUMP. 5. Cabin  emergency  hatch  Remove  and stow. 6. Seat belts and harnesses Secured. 7. Nonessential          electrical     equipment OFF. 8. Touchdown On safe main gear first. NOTE Fly     a     normal     approach     to touchdown.          After     landing, accomplish the following: 9. Condition levers FUEL CUTOFF. 10. Fire pull handle Pull. 11. Master switch OFF. f    Landing  With  Flat  Tire(s).    If  aware  that  a main gear tire(s) is flat, a landing close to the edge of the   runway   opposite   the   flat   tire   will   help   avoid veering off the runway.  If the nose wheel tire is flat, use minimum braking. 9-31.  CRACKED WINDSHIELD. a. External   Crack.      If   an   external   windshield crack is noted, no action is required in flight. NOTE Heating elements may be inoperative in areas of crack. b. Internal  Crack.    If  an  internal  crack  occurs, perform the following: 1. Descend Below 25,000 feet. 2. Cabin Pressure Reset pressure differential  to  4  PSI  or  less  within  10 minutes. 9-32.  CRACKED CABIN WINDOW If  crack in a single ply of the external cabin window occurs, unpressurized flight may be continued.  Proceed as follows: 1. Oxygen As required. 2. Cabin pressurization Depressurize. 3. Descend As required. NOTE If   both   plys   of   the   external cabin  window  have  developed cracks, the aircraft shall not be flown    once    landed,    without proper ferry flight authorization. 9-13