Flight Crew Air Transport Pilot (ATP)
Other / Unknown
Aircraft Equipment Problem Critical
Flight Crew Landed As Precaution; Flight Crew Diverted
Human Factors; Aircraft
Level at FL370 L AFT entry door light on. Pressurization was normal. Per QRH procedure; cabin crew was instructed to verify door handle was closed. It was slightly raised; and per procedure; cabin crew moved handle to closed position. Warning light initially extinguished; but re- illuminated. Cabin crew reported handle rose up again. Per QRH procedure; as handle was not in closed position; we elected to divert. Dispatch was notified and they concurred with divert decision.
B737-800 Captain reports a left aft entry door light on at FL370. The cabin crew finds the door handle slightly raised and moves it to the closed position extinguishes the light. The door warning light returns and the handle is found slightly raised again and elects to divert for maintenance.