As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT FROM BOS THE LEFT RED GEAR UNSAFE LIGHT ILLUMINATED. ABNORMAL PROCEDURE COMPLETED. AIRSPEED LESS THAN 270 KIAS FOR THE DURATION OF THE FLIGHT. CHECKED LEFT GEAR UP LOCK SENSOR. FOUND ADJUSTMENT OUT OF LIMIT. ADJUSTED SAME TO WITHIN LIMITS. OPS CHECKS GOOD IAW B727 M/M 32-61-81.