TM 55-4920-328-13 (8)    The  data  from  the  calibration  chart  should  be reduced to a single value, stated as the "Test Stand C- Factor".  The "Test Stand C-Factor" will be the average Ib/hr  divided  by  the  average  cycles  per  sec  and  the calibrated fluid specific gravity: Ibs/hr (Test Stand C-Factor = cps divided by cal fluid SG) (9)    The  digital  indicator  pre-set  K  factor  is  then determined as follows: (a)  After determining the test fuel specific gravity, use that value times the test stand C-factor to calculate the "K" factor. (b)    "K-factor"  =  Test  Stand  C-factor  X  Test  fuel specific gravity (c)  Temperature Compensation. (d)  (Should be the measured fuel temp minus the calibration fluid temp) =.DF (e)      This   should   then   be   used   to   obtain   the corrected  SP.    GR.    by  subtracting  the  measured  SC. from cal fluid SG., then this difference XDF = corrected SG. NOTE The pressures specified in the following  step  are  applicable  to  the supply  oil  pressures  available  at  the engine oil pump with the engine not operating. r.    Verify  that  the  oil  pressure  gage  (80,  figure  7-8) indicates 10 0.5 psig if a T53 engine is to be tested, or 5 0.5 psig if a T63 engine is to be tested. s.    For  T73  engine  test  only,  adjust  the  water  in  and water  out  hydronic  master  control  units  in  the  control cab assembly to pressurize the water brake assembly to 100 psig. I.    For  T73  engine  test  only,  adjust  the  air  pressure into the water brake assembly to 80   5 psig.  For T53 engine test, adjust the air pressure into the water brake assembly to a minimum of 20 psig. Section III.  STARTING AND OPERATING PROCEDURES 3-8.  Electric Start Procedures WARNING Ear    protection    must    be    worn    by operating personnel outside the control cab when the engine Is being operated.      Failure   to   observe   this warning will result in damage to and eventual loss of hearing. Accomplish     the     start     of     a     gas     turbine     engine (equipped with an electric starter) in accordance with the following: CAUTION Do not operate the electric starter in excess    of    the    specified    operating time.      Allow   the   specified   time   to elapse  between  attempted  starts  for the   dc   motor   to   cool.      Failure   to observe this precaution will result In damage to the starter and will reduce the service life of the batteries.  Refer to  the  applicable  aircraft  manual  for specific time limitations. a.  Depress switch 30 on data selector assembly 1A2 (7,    figure    1-22),    then    depress    the    ENGINE    FUEL SOLENOID   switchlight   (30,   figure   1-24).      Verify   an indication of fuel pressure on the FUEL FLOW monitor unit (16, figure 1-23) unit 2A2. WARNING Do not exceed any specified temperature  after  lightoff.    Observe the     critical     temperatures     on     the EXHAUST    GAS    TEMP    meter    (38, figure  1-24).    Failure  to  observe  this precaution     will     result     in     severe damage to the engine and equipment and may result In serious injury due to explosion or fire. b.    Simultaneously  depress  the  START  switch  (31), IGNITION switch (32), and the TIMER START switchlight  unit  (35).    If  lightoff  does  not  occur  in  the specified time as indicated on the elapsed time indicator (37),     immediately     depress     the     switches     and     the switchlight   units   a   second   time.      Allow   the   specified waiting period prior to attempting a restart.  If, during a start, the temperature indicated on the EXHAUST GAS TEMP Change 2 3-9