TM 1-1510-224-10 f. APR-44 antennas Check condition. g. Emergency light Check condition. h. Cabin   door   Check   door   seal    and condition. i. Fuselage   top   side   Check   general condition and antennas. *j. Chocks and tiedowns Check removed. * 8-12.  INTERIOR CHECK. 1. Cargo/loose equipment Check secured. * 2. Cabin/cargo doors Test and lock: a. Cabin door Check closed and latched as follows: (1) Safety arm and diaphragm plunger  Check  position  (lift  door step). (2) Index marks on rotary cam locks (6)  Check  aligned  with  indicator windows. b. Cargo door Check closed and latched as follows: (1) Upper handle Check closed and latched. (Observe through cargo  door  latch  handle  access cover window.) (2) Index marks on rotary cam locks (4)  Check  aligned  with  indicator windows. (3) Lower   pin   latch   handle   Check closed   and   latched.      (Observe through  cargo  door  lower  latch handle access cover window.) (4) Carrier rod Check orange indicator    aligned    with    orange stripe  on  carrier  rod.    (Observe through window, aft lower corner.) c. BATTERY switch-OFF. d. Cargo door Check closed and latched. e. Cabin door Close but leave unlatched.      Check   CABIN   DOOR annunciator light illuminated. f. Cabin  door  Open.    Check    CABIN DOOR annunciator light extinguished. g. BATTERY     switch     ON.          Check CABIN     DOOR     annunciator     light illuminated. h. Cabin door Close and latch.  Check CABIN DOOR  annunciator light extinguished. NOTE The   above   procedures   check   both cargo and cabin door security provisions. 3. Emergency   exit   Check   secure   and   key removed. 4. Mission   cooling   ducts   Check   open   and free of obstructions. 5. Flare/chaff dispenser preflight test Completed. 6. COMSEC keys Loaded as required. 7. Crew briefing As required. 8-13.  BEFORE STARTING ENGINES. * 1. Oxygen system -Set as required. 2. Circuit breakers Check in. * 3. Overhead panel Check and set. a. Light dimming controls As required. b. Cockpit lights (3) As required. c. CABIN  AIR  MODE  SELECT  switch OFF. d. ENG   INLET   LIP   HEAT    switches OFF. e. ICE VANE POWER SELECT switches (2) MAIN. f. ICE  VANE  CONTROL  switches  (2) ON. g. ICE & RAIN switches Off. h. EXTERIOR LTS switches As required. i. # 1 and  # 2  EFIS POWER  switches Off. j. AVIONICS MASTER POWER switch As required. k. AUTO PLT POWER switch Off. l. # 1 and # 2  INVERTER switches As required. m. Environmental switches As required. n. AUTOFEATHER switch OFF. o. # 1 AUTO IGNITION switch Off. p. # 1 ENG START switch OFF. 8-14