What was found
AFTER T/O RW 22L JFK. LT MAIN GEAR FAILED TO RETRACT. INDICATIONS WRE LEFT UNSAFE LIGHT AND A RED DOT LEFT GEAR ON CONFIG PAGE. ALSO NOTICED YAW WITH 1GEAR STILL DOWN. R & R LT TRIM CYLINDER PER MM 32-37-01-2. REMOVED AND REPLACED NR 2 SYS BRAKE LINES ON NR 5 & 6 BRAKES. BLEED BRAKES AS PER M.M. 32-43-01-3. REPLACED ALL BROKEN SUPPORTS, AND CLAMPS SUPPORTING HYD LINES USING STANDARD MAINT PRACTICES. LEAK CHECK OK OF HYD LINES AND BRAKES. BLED BOGIE TRIM CYCLINDER. LEAK CHECKS NORMAL. A/C JACKED PER MM 07-11-00-2. PERFORMED GEAR SWING SWING PER MM 32-30-00-5. OPS CK'S OK.GEAR INDICATION CK'S OK PER MM 32-60-00-5.