As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, CYCLED GEAR UP AND ALL 4 GEAR REMAINED RED. CHECKED TO ENSURE GEAR HANDLE WAS IN AND LOCKED. COMPLIED WITH QRH PROCEDURES AND RETURNED TO PANC. AMM: 32-61-04-4. REMOVED LANDING GEAR HANDLE POSITION SWITCH. INSTALLED SWITCH UP TO TORQUING 2 SCREWS. AMM 32-61-04-4. FINISHED INSTALLATION IAW AMM 32-61-04-4. OPS CHECKED GOOD.