TM 55-4920-328-13 NOTE The  specified  warmup  and  stabilization  of  the power  supplies  will  be  accomplished  during  the time required for the following functional checkout procedures. r.    Energize  the  following  switchlight  units  on  services panel assembly 4A1 as shown in figure 1- 25. ENGINE DC (27) 115 VAC 400HZ (28) INST DC (29) CONSOLE DC (30) 26 VAC 400 HZ (31) s.      Depress   the   LAMP   TEST   switchlight   unit   (24)   on services  panel  assembly  4A1  (9)  and  en-  sure  that  all switchlight  unit  lamps  come  on,  then  release  the  LAMP TEST switchlight unit.  All lamps must go off at this time. t.  Depress and hold the TEST switchlight unit (26) and observe that all ALARM DISPLAY indicators (11 through  23)  intermittently  flash  on  and  off  and  that  the audible  alarm  unit  sounds  continuously.    Do  not  release the TEST switchlight unit at this time. u.    While  holding  the  TEST  switchlight  unit  (26)  in  the depressed position, depress and hold the ACK switchlight unit   (25).      Observe   that   all   indicators   on   the   ALARM DISPLAY  section  of  the  panel  come  on  and  remain  on, and that the audible alarm ceases to sound. v.    Release  the  TEST  switchlight  unit  (26)  and  the  ACK switchlight   unit   (25).      Observe   that   all   indicators   (11 through  23)  go  off  and  remain  off  when  the  switchlight units are released. w.  Depress the LAMP TEST switchlight unit (17, figure 1- 24)  on  operator's  panel  assembly  3A3.  Observe  that  all switchlight unit lamps (16  through 30) come on. x.    Release  the  LAMP  TEST  switchlight  unit  (17).    The switchlight unit lamps must go off. y.    Energize  the  following  switches  on  the  No..  l  power control panel assembly (32, figure 1-26): CAUTION Energizing   the   BRAKE   PUMP   start   switch   (8) causes  large  transient  power  VARIATIONS.    The Inst   Pwr   switch   (7)   should   be   OFF   prior   to energizing the brake pump start switch, and then energized ON after the pump stablizes. BRAKE PUMP START (8) COOLING PUMP START (9) TOWER FAN NO.  1 START (10) TOWER FAN NO.  2 START (11) AIR COMP START (12) LUBE PUMP START (13) (if applicable) OIL PRE-HEAT ON (14) (for T63 engine test only) OIL PUMP START (15) (if applicable) FUEL PUMP START (16) FLOOD LIGHTS ON (17) BEACON ON (19) NOTE The   pressures   specified   in   the   following   step may  be  adjusted  with  the  engine  disconnected, or with the engine connected but not operating. z.  For test of a T53 engine, adjust the pressure regulator valve  (76,  figure  7-8)  to  a  pressure  of  10  +  0.5  psig  as indicated  on  the  pressage  gage  (80).  For  test  of  a  T63 engine, adjust the pressure regulator valve for a pressure of 5 + 0.5 psig. aa.  Observe and record the ambient barometric pressure indicated  on  the  barometer  (11,  figure  1-  27)  located  on the ancillary panel assembly 9A3 (37. ab.  Note and record the time of day indicated on the 24- hour clock (5). ac.  Position the AIR SUPPLY switch (9) to ON. ad.  Adjust the pressure regulator (6) until the air pressure gage (8) reads the pressure desired. ae.    Note  the  inlet  and  outlet  pressures  indicated  on  the WATER PRESSURE IN meter M3 (4, figure 1-25) and on the  WATER  PRESSURE  OUT  meter  M4  (5)  Ensure  the the water-in master control unit is partially open and that the  water-out  master  control  unit  is  fully  open.    Refer  to figure 1-21 for the location of the master control units on the  for-  ward  writing  surface  assembly  adjacent  to  the operator's sub-module. af.  Adjust the master control unit as required to obtain 30 psig   inlet   water   pressure   to   the   remote   water   brake assembly,  as  indicated  on  the  WATER  PRESSURE  IN meter (4, figure 1-25). ag.    Depress  the  following  switches  on  the  No.    1  power control panel assembly (32, figure 1-26) to deenergize the associated circuits: 2-48       Change 2