Melbourne will appeal the AFL Tribunal's decision to suspend young midfielder Jack Trengove for what they believe was a faultless tackle.

Trengove was banned for three matches on Tuesday night, over the tackle which concussed Adelaide's Patrick Dangerfield at the MCG on Sunday.

The 19-year-old pinned Dangerfield's arm and threw him to the ground, but argued it was an unfortunate accident that the Crow's head slammed into the ground.

The AFL's appeals board will re-examine the case on Thursday afternoon.

The Demons are fighting the charge on the grounds that the decision was so unreasonable that no tribunal could have made it with regard to the evidence.

They also say both the classification of the level of offence and the sanction imposed were manifestly excessive.

Demons football operations manager Craig Notman said on Wednesday they believed it was a textbook tackle.

"We deem it as a tackle that, from what we teach our players, was completed to a tee," Notman told Melbourne's SEN radio.

"It's unfortunate that Patty Dangerfield was hurt, but part of his actions actually contributed to the force he hit the ground.

"Jack's tackle was probably as close to perfect as we could want."

But AFL football operations manager Adrian Anderson defended the tribunal's decision.

"It's one of those ones that's very much debatable over where the line should be drawn, but where we do, we make no apologies for reducing neck and head injuries in the game," Anderson told Triple-M radio.

"We don't want to see players concussed and we ask that you show some care towards your opponent when the arm is pinned.

"You can tackle a player to the ground, but don't unnecessarily sling him when his arm is pinned."

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