TM 1-1510-225-10 9-9 1.  CABIN   signs   switch   –   NO   SMOKE   & FSB. 2.  BLEED  AIR  VALVE  switches  –  ENVIR OFF. 3.  Altitude  –  Descend  below  14,000  feet  as soon as practicable. 4.  Oxygen – As required. 9-25.  PROPELLER FAILURE, OVER 2120 RPM. If an overspeed condition occurs that cannot be controlled with the PROP lever or by reducing power, perform the following: 1.  POWER lever (affected engine) – IDLE. 2.  PROP lever (Affected Engine) – FEATHER. 3.  CONDITION lever – As required. 4.  Engine cleanup – As required. 9-26.  FIRE. The  safety  of  aircraft  occupants  is  the  primary consideration   when   a   fire   occurs,   therefore,   it   is imperative that every effort be made by the flight crew to put the fire out.  On the  ground  it  is  essential  that the   engines   be   shut   down,   crew   and   passengers evacuated, and fire fighting begun immediately.  If the aircraft   is   airborne   when   a   fire   occurs,   the   most important single action that can be taken by the pilot is to land safely as soon as possible. a.  Engine Fire.  The following procedures shall be performed in case of engine fire. (1)  Engine/Nacelle     Fire     During     Start     or Ground Operations.  If engine/nacelle fire is identified during start or ground operation, perform the following: 1.  PROP levers – FEATHER. 2.  CONDITION   levers   –   FUEL   CUT- OFF. 3.  Fuel  FIREWALL  SHUTOFF  VALVES – CLOSED. CAUTION If   fire   extinguisher   has   been   used   to extinguish an engine fire, do not attempt to restart  until  maintenance  personnel  have inspected  the  aircraft  and  released  it  for flight. 4.  PUSH    TO    EXTINGUISH    switch    – Push. 5.  MASTER SWITCH – OFF. (2)  Engine  Fire  in  Flight  (Identified).    If  an engine fire is confirmed in flight, perform the following: CAUTION Due   to   the   possibilities   of   fire   warning malfunctions,  the  fire  should  be  visually identified before the engine is secured and the extinguisher actuated. 1.  POWER lever – IDLE. 2.  PROP lever – FEATHER. 3.  CONDITION   lever   –   FUEL   CUT   – OFF. 4.  Fuel FIREWALL SHUTOFF VALVE – CLOSED. 5.  PUSH    TO    EXTINGUISH    switch    – Push as required. 6.  Engine cleanup – Perform. 7.  Land as soon as practicable. b.  Fuselage  Fire.    If   a   fuselage   fire   occurs, perform the following: The    extinguishing    agent    (bromochloro- difluoromethane)   in   the   fire   extinguisher can produce toxic effects if inhaled. 1.  Fight the fire. 2.  Land as soon as possible. c.  Wing Fire.  There is little that can be done to control a wing fire except to shut off fuel and electrical systems that may be contributing to the fire, or which could  aggravate  it.    Diving  and  slipping  the  aircraft WARNING O O