TM 1-1510-224-10 CAUTION Use    of    aviation    gasoline    is    time- limited    to    150    hours    of    operation during    any    Time-Between-Overhaul (TBO)  period.    It  may  be  used  in  any quantity    with    primary    or    alternate fuel. 5-14.   OVERTEMPERATURE AND OVERSPEED LIMITATIONS. a. Whenever   limiting   temperatures,   listed   in   the Engine    Operating    Limitations    chart    (table    5-1),    are exceeded   and   cannot   be   controlled   by   retarding   the power levers, the engine will be shut down and a landing made as soon as possible. b. During   engine   starting   the   temperatures   and time   limits   listed   in   the   Engine   Operating   Limitations chart  (table  5-1)  must  be  observed.    When  these  limits are  exceeded,  the  incident  will  be  entered  as  an  engine discrepancy in the appropriate maintenance forms.  It is particularly  important  to  record  the  amount  and  duration of over temperature. c. Whenever the prescribed engine overspeed limit or  engine  RPM  operating  limit  is  exceeded,  the  incident must   be   reported   as   an   engine   discrepancy   in   the appropriate maintenance forms.  It is particularly important    to    record    the    maximum    percent    of    RPM registered    by    the    tachometer,    and    the    duration    of overspeed. d. Continued   engine   operation   above   810C   will reduce engine life. 5-15.   POWER DEFINITIONS FOR ENGINE OPERATIONS. The  following  definitions  describe  the  engine  power ratings. a. Takeoff Power. The maximum power permissible, limited to periods of five minutes duration. b. Maximum Continuous Power. Maximum continuous power is the highest power rating not limited by  time.    Use  of  this  rating  is  intended  for  emergency situations at the discretion of the pilot. 5-16.   GENERATOR LIMITS. Maximum   generator   load   is   limited   for   flight   and variable  during  ground  operations.    Observe  the  limits shown in table 5-2 during ground operation. Table 5-2.  Generator Load Limits GENERATOR LOAD MINIMUM GAS GENERATOR RPM - N 1 0 to 95% 65% 95 to 100% 70% Section IV.  LOADING LIMITS 5-17.   CENTER OF GRAVITY LIMITATIONS. Center of gravity limits and instructions for computation   of   the   center   of   gravity   are   contained   in Chapter 6.  The center of gravity range will remain within limits,   providing   the   aircraft   loading   is   accomplished according to instructions in Chapter 6. 5-18.   WEIGHT LIMITATIONS. WARNING The    ability    to    experience    loss    of engine  power  and  successfully  stop, continue the takeoff, or climb, before or after gear retraction is not assured for  all  conditions.    Thorough  mission planning must be accomplished prior to   takeoff   by   analysis   of   maximum takeoff   weight   permitted   by   takeoff distance, accelerate-stop, positive one   engine   inoperative   climb   at   lift off, accelerate-go, takeoff climb gradient,     and     climb     performance. This  data  will  describe  performance capabilities for critical mission decisions. Max.  Ramp Weight - 16,620 lbs 5-9