Category B consists of two sectors in the field of maintenance and they are divided in B1 and B2 with certain roles. The operations performed by Category B technicians are as follows:

► Activities related to scheduled on field inspections for aircraft maintenance.

► Activities of complex rectification

► Fault diagnosis on aircraft systems and their equipment's.

► Modification and performing special instruction to monitor and manage the system

► Repairing of air-frame and other aircraft's

► Activities performed like removal of aircraft components and fitting the required parts.

► Use of BITE (built-in test equipment) and diagnostic equipment's to perform repair tasks.

► Supervising and certifying the work of other technicians involved in it.