Definition
A specific quantity of a material produced together under uniform conditions from the same raw materials, processed as a single unit so that every item in the group shares the same characteristics and traceable production history.
Plain English
A group of parts or material made at the same time, in the same way, from the same source, so they can all be tracked together.
Context Anchor
Seen in aircraft maintenance, parts records, material labels, and supplier notices when items need to be traced back to how and when they were made.
Derivation
From Old English 'bacca,' meaning what is baked at one time in an oven. The idea carried over into industry: a batch is whatever quantity is produced together in one run.
Why Pilots Care
If a defect or recall is discovered, the manufacturer traces it by batch number. Knowing which batch a part came from determines whether your aircraft is affected by a service bulletin or airworthiness directive.
Intuition Check
Batch does not just mean any random group. In aviation maintenance, it means a group made or processed together under the same conditions, often so it can be traced later.
Example Sentence 1
The mechanic recorded the batch number of the sealant on the work order so it could be traced if a problem appeared later.
Example Sentence 2
Fuel from the same batch was used for the entire day's training flights.