Definition
A lifting device that uses a looped chain running through a system of pulleys and gears to raise, lower, or hold heavy loads with a relatively small amount of pulling effort. In aviation maintenance, chain hoists are commonly used to lift engines, large components, and aircraft assemblies during installation, removal, or overhaul.
Plain English
A hand-operated lifting tool that uses a chain and gears to make heavy lifting easy. You pull on one chain, and the gearing inside multiplies your effort so the load chain raises or lowers a heavy item slowly and under control.
Context Anchor
Seen in aircraft maintenance, especially when removing, installing, or supporting heavy parts such as an engine.
Derivation
From 'chain' (a series of connected metal links) and 'hoist' (from Middle Dutch hijschen, meaning to raise or lift). The name simply describes the tool: a hoist that lifts using a chain rather than a cable or rope.
Why Pilots Care
Mechanics rely on it to move heavy assemblies without damage or injury during inspections and repairs.
Example Sentence 1
The mechanic used a chain hoist to lower the engine onto the work stand after removing the mount bolts.
Example Sentence 2
Technicians used the chain hoist to lower the propeller assembly onto the workbench.