TM 1-1500-204-23-1 (2) Safety procedures during starting.  The following    safety    procedures    should    be    accomplished during starting: (a) Employ hand signals for directing activity when engine operating noise will not permit voice communication. (b) Avoid    excessive    fuel    pressure when starting turbine engines. (c) When   fire   occurs   during   engine start, or while operating, the operator shall take necessary action,  as  outlined  in  applicable  maintenance  manual,  to extinguish  flame.    Should  this  action  fail,  the  fire  guards shall take immediate action with approved fire extinguishing   agent   provided.      Should   fire   get   beyond control of operator and fire guard, all available approved means of extinguishing an aircraft or engine fire shall be used. (d) During   start,   and   while   engines are     operating,     personnel     shall     stand     well     clear     of propellers and of areas affected by turbine air intake flow and exhaust blast. (e) All  personnel  will  remain  clear  of engines necessitating close inspections or adjustment, as directed by the specific equipment manual, until operating engine speed (rpm) has been obtained. (f) Do   not   use   a   quick,   excessive throttle   start   on   rotary   aircraft   This   kind   of   start   could swing   the   tail   rapidly,   with   the   possibility   of   injury   to personnel   or   damage   to   equipment   from   the   tail   rotor Keep   personnel   and   equipment   clear   of   aircraft   at   a distance at least equal to its length (3) Safety procedures during engine operation.      The   following   safety   procedures   should   be accomplished during engine operation. (a) Do not operate engines in hangars. (b) Do    not    operate    aircraft    engine where   propeller   or   turbine   blast   would   cause   injury   to personnel or damage to aircraft and property. (c) Nonrated    personnel    cannot    run up rotary wing aircraft under any conditions. (4) Safety procedures after operating engines.      The   following   safety   procedures   should   be accomplished after engine operation: (a) Place     ignition     switch     in     OFF position.    It  is  imperative  that  the  ignition  switch  of  an aircraft  engine  be  in  OFF  position  when  engine  is  not operating.  Master battery switch shall be turned off when no longer required. (b) Turn    off    all    tank    selector    and emergency fuel system valves. (c) When practicable, make adjustment to engine and rotors with engine stopped. b. Turbine   Engines.      Turbine   engine   starting, ground checks, and shutdown are covered in the following paragraphs. (1) Starting          Start     engines     using     the following general procedures. (a) Remove  ice  or  frost  from  engine cowling and inlet section prior to starting. (b) Connect   an   authorized   auxiliary power unit. (c) When specified minimum starting rpm   cannot   be   obtained   with   available   auxiliary   power unit, preheat accessory section and oil reservoir to reduce starting loads.  Aircraft battery may be used as a boost to obtain required rpm. NOTE In normal temperatures, starting attempts below recommended starting rpm increases the possibility of engine damage due to hot starts. (d) Accomplish engine starts according     to     procedures     outlined     in     the     applicable maintenance  manual,  using  specified  jet  fuel  or  required alternate. (e) When   there   is   no   oil   pressure after  sufficient  runup  time,  or  if  oil  pressure  drops  below operating range after a few minutes of ground operation, shut down engine and determine cause . 3-17