Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 97; Flight Crew Total 7000; Flight Crew Type 236
Confusion; Workload
Aircraft Equipment Problem Less Severe
Aircraft Equipment Problem Dissipated; Flight Crew FLC complied w / Automation / Advisory
Aircraft
I was the pilot monitoring during the event. The aircraft was descending through 9000 ft to a level off of 6000 ft and instructed to hold 210 kts until further advised by ATC while being vectored. The Aircraft experienced an uncommanded gear extension with the gear handle in the off position. Given the amount of noise in the cockpit and the additional pitch over while in level change mode; I suspected the gear had extended with the lever in the 'OFF' position. I completed the QRH procedure for 'gear disagree' shortly after level off. When the gear handle was placed to down position; the red gear unsafe lights instantaneously went to green. No further action was taken. The flight landed safely and without incident.
A B737-400 landing gear extended uncommanded during descent through 9;000 ft as the aircraft was slowing to 210 kts. Safe indications resulted with the QRH execution.