B737 flight crew reported a gear disagree indication during gear retraction and found the alternate gear extension door was open. The Captain cleaned the dirt that had accumulated around the door and then reseated and locked it into place. Flight continued to destination.
Synopsis
B737 flight crew reported a gear disagree indication during gear retraction and found the alternate gear extension door was open. The Captain cleaned the dirt that had accumulated around the door and then reseated and locked it into place. Flight continued to destination.
Narrative
After a normal takeoff from ZZZ I called for the gear to be retracted. I noticed about 30 seconds later that it sounded louder than normal and as I was calling for the flaps to be retracted; I saw 3 green and 3 red lights on the gear indicator with the handle in the up position. I pointed to the gear while the Captain was contacting departure on the radio. We continued to retract flaps and both confirmed the gear failed to retract. The Captain requested to level off at 14;000 ft. MSL with departure. I suggested the alternate gear door may have come open; he looked and confirmed my suspicion. I continued flying the airplane and took the radios while he referenced the checklist which mentions to check the door. He couldn't get it to re-seat; so he got up and had to clean the dirt and grime that had accumulated in the alternate gear extension door. The dirt had prevented the door from locking completely and he was able to clean it enough with a sanitizing wipe to get it to reseat. He got back into his seat and completed the checklist which instructed us to slow and recycle the gear; which was successful. We continued the climb and landed uneventfully in ZZZ1. After arriving at the gate; we noticed the alternate gear extension door was open again; and a maintenance write-up was sent.
Second reporter narrative
Gear disagree on takeoff. Determined it was the emergency extension gear door was slightly open. I instructed the FO to take the radios and I unstrapped and attempted to shut the door. The door would not latch due to all the dirt built up around the seal. The FO asked to level off at 14;000 and slowed to 230 kts. I cleaned the dirt from the seal and was able to get the door to latch. I returned to my seat and went to the gear disagree checklist. I cycled the gear and the gear raised normally. We continued to our destination; ZZZ1.
More incidents for this aircraft family →
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.