Tailstrike

[1][2] It can also happen during helicopter operations close to the ground, when the tail inadvertently strikes an obstacle.

[3] A minor tailstrike incident may not be dangerous in itself, but the aircraft may still be weakened and must be thoroughly inspected and repaired if a more disastrous accident is to be avoided later in its operating life.

They may be fitted with a protection device such as a small tailwheel (Concorde and the Saab Draken), tailskid (Diamond DA20), or reinforced tail bumper.

[4][5] Tailstrike incidents are rarely dangerous in themselves, but the aircraft must be thoroughly inspected and repairs may be difficult and expensive if the pressure hull is involved.

Tailstrikes can also happen with helicopters, and example of this is an Australian AW139 which on landing the rear tail hit vegetation.