MK 432 MOD 4 AIRBORNE TORPEDO PRESETTER TEST SET The MK 432 MOD 4 airborne torpedo presetter test set (fig. 16-18) has capabilities for functionally testing the  presetter  portion  of  the  armament  control  panel subassembly in the aircraft. It can also be used to check aircraft  wiring  and  the  torpedo  umbilical  connector. The MK 432 MOD 4 test set is used with the P-3 and S-3 aircraft. FORCE RETENTION GAUGE The  force  retention  gauge  (fig.  16-19)  is  used  to functionally check the bomb rack nose and tail arming solenoids. You should refer to the applicable maintenance instruction manual for the proper retention readings. REVIEW NUMBER 2 IN   ANSWERING   QUESTIONS   1   THROUGH   5, MATCH   THE   DESCRIPTION   WITH   THE   TEST SET. DESCRIPTION TEST SET Q1. Used to evaluate the operational  readiness  of the Walleye weapon guidance section cockpit television display A.   TS-3279 Q2. Used to perform the operational checks of the AIM-9 missile launching, visual  target  acquisition system (VTAS), and Side- winder expanded ac- quisition mode (SEAM) B.   B203 torpedo heat and control system test set Q3. Used to check the VTAS/ SEAM  system  on  AIM-9 missiles C.   AN/DSM-77 Q4. Used to verify the operational    status    and function   of   the   AIM-7 Sparrow   missile   on   the F-14 aircraft D.  Sparrow missile test set Q5. Used  to  perform  circuit continuity tests on Mk 46 torpedo preset circuits E.   AN/ASM-464 TEST EQUIPMENT SAFETY SUMMARY LEARNING OBJECTIVE: Recognize the safety precautions to follow when working with aircraft weapons systems test equipment. The  test  equipment  discussed  in  this  chapter  is designed to perform various functions. Two of the most important functions are— 1. to ensure the correct firing voltage is available at  the  appropriate  station  when  the  cockpit switches are properly set, and 2. to  ensure  that  voltage  or  stray  voltage  is  not present before electrical connection of certain launchers, such as rocket launchers, is made. These two functions are called aircraft release and system control checks. Normally, you perform aircraft release and system control checks before the weapons are  installed  on  the  aircraft.  However,  some  checks require the weapons to be loaded on the aircraft. As part of the loading process, the Sparrow, Phoenix, Walleye, and    Sidewinder    (on    some    aircraft)    weapons    are electrically  mated  to  the  aircraft.  Then,  the  external power is applied to the aircraft, and a missile-on-aircraft test (MOAT) is performed. This test is   normally   performed   during   the   prior-to-launch sequence. You  conduct  the  Sparrow  and  Phoenix  MOAT  by activating  the  circuits  within  the  aircraft.  Then,  you observe  the  indications  as  they  are  received  in  the cockpit. No test equipment is required to perform this test. At least two team members and a team leader using an audio headset and a TTU-304/E tester perform the Sidewinder MOAT. The TTU-304/E tester is basically a pencil flashlight with an infrared filter lens. The person in the cockpit plugs the headset into the audio connection and turns on the switches indicated in the  checklist.  These  switches  are  Sidewinder  COOL, STATION   SELECT,   and   AUDIO   CONTROL.   The person   at   the   missile   station   removes   the   missile protective dome cover. Then, with the tester turned ON, the beam of the tester is moved across the nose of the missile  from  a  distance  of  4  to  6  feet.  As  the  missile senses radiation from the tester through the launcher's audio amplifier, a tone is heard in the headset. If more than one missile is loaded, each missile should be tested and the dome covers replaced. Sidewinder MOAT may also  be  performed  during  pretaxi  arming  signals  with the pilot as the person in the cockpit. 16-13