What was found
FLT#1005, JFK- PDX. (AIRCRAFT PERFORMED AN AIR TURN BACK TO JFK) ' UPON TAKEOFF L/G GEAR NOT UPLOCKED CAUTION MESSAGE APPEARED; REF L/P 3720661, ITEM 2 (GROUND CONFIG AFTER FLT CONFIG W/ ELECT PWR C/W IAW AMM TASK 32-00-00-860-002A, AMM TASK 34-11-00-440-801 AND AMM TASK 21-26-00-860-001.), 3720662, ITEM 1 (REMOVED AND REPLACED NLG PROX SW 25GA IAW AMM 32-31-73. OPS TEST GOOD) & 2 (REMOVED AND REPLACED #1 LGCIU IAW AMM 32-31-71. BITE TEST DONE IAW AMM 32-69-00. NO DEFECTS NOTED) AND 3720663, ITEM 1 (REMOVED AND REPLACED #2 LGCIU IAW AMM 32-31-71. BITE TEST DONE IAW AMM 32-69-00. NO DEFECTS NOTED.) REPLACED NLG PROX SENSOR 25 GA AND REPLACED LGCIU 1 & 2. ALL OPS CHECK IS GOOD. FUNCTIONAL TEST OF THE NORMAL EXT AND RETRACTION OF L/G C/W. ALL GOOD. A/C OK FOR SERVICE.'