TM 55-1520-240-T 6-1.3 TRANSMISSION LUBRICATION SYSTEMS OPERATIONAL CHECK 6-1.3 INITIAL SETUP References: Applicable Configurations: TM 55-1520-240-10 All TM 55-1520-240-23 Tools: Equipment Condition: Aircraft Mechanic's Tool Kit, TM 55-1520-240-23 NSN 5180-00-323-4692 Battery Connected Materials: Electrical Power On None Hydraulic Power Off Personnel Required: Visual Check of Transmission Lubrication System Medium Helicopter Repairer Performed Rotary-Wing Aviator (2) TASK RESULT NOTE If last flight reported trouble symptom of low oil pressure indication    and    XMSN    OIL    PRESS capsule on, go to Task 6-1.4. 1. Check six TRANSMISSION CHIP DETECTOR indica- If any indicator (1) displays black-and-white fan, go to tors (1). Task 6-2.3. 2. Check five TRANSMISSION DEBRIS SCREEN indica- If any indicator (2) displays black-and-white fan, go to tors (2). Task 6-2.3. 3. Check XMSN CHIP DET (WITHOUT  74 ) XMSN CHIP If capsule (3) is lit, go to Task 6-2.3. DETR (WITH  74 ) capsule (3). 4. Check that XMSN OIL PRESS switch (4) and XMSN If either switch (4 or 5) is not at SCAN, set it to SCAN. OIL TEMP switch (5) are at SCAN. 5. Have pilot start engines and stabilize rotors at 100 XMSN OIL PRESS capsule (7) shall go out as pointer on percent rpm.  Check master caution panel and XMSN XMSN OIL PRESS indicator passes 20 psi.  If indicator OIL PRESS indicator (6) as rotor rpm accelerates to reads below 20 psi and capsule (7) is on, note which 100 percent. TRANSMISSION MAIN OIL PRESS light (8) is on.  Have pilot stop engines, then go to Task 6-1.4.  If indicator reads below 20 psi and capsule (7) is out, note which XMSN OIL PRESS switch position is lit.  Have pilot stop engines, then go to Task 8-9.3.  If indicator reads above  20 psi and capsule (7) is on, note which TRANSMISSION MAIN OIL PRESS light (8) is on.  Have pilot stop engines, then go to Task 6-1.5. GO TO NEXT PAGE 6-10  Change 17  Page 6-9 is a blank page.