L-1011 Landing Gear and Brakes: MLG and NLG Up-lock (32-11/12)

With the landing ear in the retracted position, the main landing gear is healed by resting on the triangular door beam, not the actual door.  The gear door lock and the gear up-lock are one and the same. With the gear switch placed in the neutral position, all hydraulic power is removed from the gear and it rides between two shock absorbing snubbers. 

The nose landing gear is held in the retracted position mechanically by the up-lock device on the aft wall of the nose gear wheel well. The two pairs of doors are mechanically sequenced closed by the retracting action of the gear.