Narrative:

While on final approach and approximately 2000 ft AGL. Approaching runway xxr; I called for the landing gear to be lowered; when the first officer placed the landing gear handle down; we felt what seemed like a big tremor (bang) and the aircraft veered a bit to the left. At the time I was hand flying the approach and was able to maintain control of the aircraft. Besides the three of us being startled by what had just happened; we assessed the situation by checking our instruments. We got a status message that read 'air-gnd right' and a moment thereafter an EICAS message that read 'autospeedbrake.' all other engine instruments and indications were normal. We had a decision to make whether to continue or go-around. Landing gear indications were normal; showing down and locked and our gear synoptic was normal. There were no unusual indications on our flying instruments nor were any vibrations felt. I stowed the speedbrakes handle since we had the EICAS message. We opted for continuing the approach which in my opinion was the best choice given what we found out after landing and talking to the mechanics and seeing the damage done to the left main landing gear. The landing itself was a smooth landing and the taxiing to our parking stand was normal. Upon talking to the mechanics and seeing the damage to the left main landing gear; it was determined that we had a structural failure of the retract actuator pin which broke. I spoke to a mechanic and he further explained to me what had happened with the gear. I questioned him about what would have happened in the event we went around; and his answer was straight forward. The landing gear would not have gone up and there was a good probability that we could've made the situation worse.

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Original NASA ASRS Text

Title: When lowering the landing gear on a B777 the crew heard a loud bang; continued the approach; and landed without incident. The loud bang came from the Left MLG Actuator Pin which failed.

Narrative: While on final approach and approximately 2000 ft AGL. Approaching Runway XXR; I called for the landing gear to be lowered; when the first officer placed the landing gear handle down; we felt what seemed like a big tremor (bang) and the aircraft veered a bit to the left. At the time I was hand flying the approach and was able to maintain control of the aircraft. Besides the three of us being startled by what had just happened; we assessed the situation by checking our instruments. We got a status message that read 'air-gnd R' and a moment thereafter an EICAS message that read 'Autospeedbrake.' All other engine instruments and indications were normal. We had a decision to make whether to continue or go-around. Landing gear indications were normal; showing down and locked and our gear synoptic was normal. There were no unusual indications on our flying instruments nor were any vibrations felt. I stowed the speedbrakes handle since we had the EICAS message. We opted for continuing the approach which in my opinion was the best choice given what we found out after landing and talking to the mechanics and seeing the damage done to the left main landing gear. The landing itself was a smooth landing and the taxiing to our parking stand was normal. Upon talking to the mechanics and seeing the damage to the left main landing gear; it was determined that we had a structural failure of the retract actuator pin which broke. I spoke to a mechanic and he further explained to me what had happened with the gear. I questioned him about what would have happened in the event we went around; and his answer was straight forward. The landing gear would not have gone up and there was a good probability that we could've made the situation worse.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.