Captain reported severe nose wheel vibration on take off. The flight crew elected to divert for a precautionary landing.

Date: 2022-06 · Aircraft: Dash 8-400 · Phase: takeoff

Anomalies: Aircraft equipment problem criticalDeviation discrepancy procedural clearanceDeviation discrepancy procedural published material policyGround event encounter loss of aircraft control

Synopsis

Captain reported severe nose wheel vibration on take off. The flight crew elected to divert for a precautionary landing.

Narrative

Severe nose wheel shaking at V1/rotation speed on takeoff Runway XXR ZZZ. Above landing weight. Above 10;000 ft.; we consulted with Maintenance and Dispatch and diverted to ZZZ1 (ZZZ1 just far enough for below max landing weight)-stated reason not to continue to ZZZ2 was no tires available in ZZZ2. Upon landing I was very gentle with the nose gear and kept it off until as slow as possible- upon spinning up; it was less violent at a slower speed and some weight off; but very obviously had something wrong with it. All seemed normal at taxi speed-no vibration. I have over the years had occasions of tire out of balance and nose wheel shimmy from time to time. This was an order of magnitude worse-as in a factor of 10. The whole front of the airplane shook; flight deck instruments were difficult to read; and the front Flight Attendant and Passengers were very aware. This begs the question of a tire manufacturing flaw or of an improper tire change. We were delayed originally as Maintenance announced a tire change in ZZZ just as the first passengers showed up to board- passengers sent back to gate. So this was the first flight after a nose tire change. I request a follow up email describing the extent of the problem- bad tire; bad tire change; or something else. We landed about 100-200 lbs. below max landing weight in ZZZ1. As we were too heavy to land immediately and all was normal in flight; I took my time getting above 10;000 ft. and discussing with FO (First Officer) before contacting Maintenance. This was the FO first diversion and it was a very hectic time for him. ZZZ1 comes fast when not planned. I slowed the airplane a bit to give him more time and tried to make everything as easy as possible and as much like a normal flight as possible. Definitely good to use these types of things in CQ (Crew Qualification) training. Getting away from the expected makes everything harder and more challenging.Dispatch; Maintenance; Operations all very helpful. It is a pleasure working with all these excellent people during an abnormal situation.

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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.