TM 1-1520-238-T-4 3–30 3–13. PILOT BRAKE – IS NOT FIRM OR WHEEL ASSEMBLY ROTATES (WITH 3–13 PRESSURE APPLIED) Tools: Nomenclature Part Number Tool Kit, Aircraft SC518099CLA01 Mechanic’s Jack, Hydraulic Axle, MIL-J-26013 5-Ton (2) Personnel Required: 67R Attack Helicopter Repairer One person to assist References: TM 1-1520-238-23 WARNING Brake fluid may be pressurized. To avoid possible eye injury, wear face shield. NOTE Ensure that parking brake is released prior to proceeding. 1. Service and bleed brake system (TM 1-1520-238-23). Are pilot brakes firm? YES Go to paragraph 3–10. NO Go to step 2. 2. Check CPG brakes. Are CPG brakes firm? YES Go to step 3. NO Go to step 4. 3. Inspect brake lines between pilot’s master cylinder and transfer valves. Are brake lines leaking? YES Repair leaking brake lines and service and bleed brake system (TM 1-1520-238-23). NO Go to step 6. 4. Detach left or right upper trailing arm hose at fuselage quick disconnect. Are pilot brakes firm? YES Go to step 5. NO Go to step 7. 5. Attach hose assembly and apply pilot’s brakes. Is leakage present at trailing arm lines or wheel brake assembly? YES Repair and/or replace as necessary to correct leakage. Service and bleed brake system TM 55-1520-238-23). NO Inspect wheel brake system for wear and replace as necessary3 (TM 1-1520-238-23). 6. Apply and maintain pressure on CPG left or right brake. Are pilot brakes firm? YES Go to step 8. NO Replace pilot master cylinder (TM 1-1520-238-23). 7. Remove fluid level screw on CPG master cylinder and apply brakes. Does fluid flow from CPG master cylinder? YES Replace transfer valve (TM 1-1520-238-23). NO Repair or replace as necessary to correct leakage. Service and bleed brake system (TM 1-1520-238-23). 8. Inspect brake lines between transfer valves and parking valves. Are brake lines leaking? YES Repair leaking brake lines. Service and bleed brake system TM 55-1520-238-23). NO Replace parking brake valve (TM 1-1520-238-23). END OF TASK