TM 1-1510-224-10 9-30.  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. 1. LDG GEAR CONTR switch - Check DN. (2) LANDING GEAR CONTROL and LANDING   GEAR   IND   circuit   breakers   - Check in. 3. GEAR  DOWN  lights  -  Check  illuminated. If indication remains unsafe: 4. Landing gear emergency extension - Perform. WARNING If   for   any   reason   the   green   GEAR DOWN  lights  do  not  illuminate  (e.g., in     case     of     an     electrical     system failure), continue pumping until sufficient  resistance  is  felt  to  ensure that the gear is down and locked.  Do not stow the LANDING GEAR ALTERNATE EXTENSION pump handle,   but   leave   it   in   the   full   up position.  The landing gear cannot be manually retracted in flight. b. Landing Gear Emergency Extension. 1. Airspeed - Below 179 KIAS. (2) LANDING GEAR CONTROL circuit breaker - Pull. 3. LDG GEAR CONTR switch - DN. 4. LANDING            GEAR            ALTERNATE EXTENSION pump handle - Unstow. 5. LANDING            GEAR            ALTERNATE EXTENSION   pump   handle   -   Pump   until the three green GEAR DOWN annunciators illuminate and red gear handle lights  extinguish. 6. LANDING            GEAR            ALTERNATE EXTENSION  pump  handle  -  Stow  (secure in clip). c. Gear-up Landing. 1. Crew emergency briefing - Completed. (2) Loose equipment - Stowed. (3) ENVIRO    &    PNEU    BLEED    AIR    valve switches - PNEU ONLY. (4) CABIN PRESS switch - DUMP. (5) Cabin   emergency   hatch-   Remove   and stow. 6.   Seat belts and harnesses - Secured. 7. LANDING            GEAR            ALTERNATE EXTENSION pump handle - Stowed. (8) LANDING      GEAR      CONTROL   circuit breaker - In. 9. Gear - UP. (10) Nonessential electrical equipment - Off. 11.   Flaps - As required (DOWN for landing). NOTE Fly a normal approach to touchdown. Avoid  touching  down  in  a  nose-high attitude. Brakes   may   be   used   for   reducing landing roll and for directional control. 12. POWER levers (runway assured) -  IDLE. 13. PROP levers - FEATHER. (14) CONDITION levers - FUEL CUTOFF. 15. FIRE PULL handles - Pull. (16) MASTER SWITCH - OFF. 9-31.        CRACK    IN    ANY    SIDE    WINDOW    OR    IN WINDSHIELD. If  it  has  been  determined  that  a  crack  has  developed  in any side window or windshield: 1. Altitude - Maintain 25,000 feet or less. (2) Pressurization controller - Reset to maintain 4.0 PSI or less as required. NOTE Prior     to     next     flight,     maintenance actions   are   required.      Refer   to   the Cracked   Cabin   Window/   Windshield limitations in Chapter 5.  While inner- ply     cracking     is     not     a     structural consideration  requiring  replacement, possible glass flaking from the damaged   area   could   interfere   with pilot vision. 9-14