scope:

Description of Driving Event:

The 1500-pound withdrawal weight for the ET LH2 vent line must be raised to access the withdrawal weight shock absorbers to perform maintenance. Personnel work directly beneath the withdrawal weight, held in place with a 125 psi air-operated winch and 5/8" diameter wire rope. The system design does not include a secondary means to secure the weight if the winch or wire rope fails, so workers shore the weights with pieces of wood or other available material that will brace the weights. The improperly used shoring devices could break under the load of the weights, causing injury to personnel.