EMB ERJ 170/175 ER/LR
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Aircraft; Procedure
Upon landing when the main landing gear touched down; the aircraft immediately experienced strong vibrations that shook the entire aircraft. The vibrations ended once we were below 50 knots. There was no checklist to run. We talked about the event and believed it was possibly a brake issue. However; the brake temperatures were normal and within limits. We decided to continue to taxi to the gate and had no further problems.Post-flight inspection of the landing gear resulted in no observed anomalies by the flight crew. Later; Maintenance reported that several bolts along with safety wire was missing from the left main landing gear shimmy dampener.
Almost immediately after the main landing gear hit the runway; while the nose wheel was still in the air; as I started to apply light brake pressure; the aircraft started to vibrate in a violent way. I released brake pressure right away and slowly lowered the nose landing gear. I just used thrust reversers to slow down. Then I slowly applied brake pressure again once we were sure the aircraft was under control.
ERJ-170 flight crew reported that a severe vibration encountered on landing was caused by missing bolts in the left main gear shimmy dampener.