Role Overview
This four-week engineering internship was undertaken at Jinnah International Airport, Karachi — under the Pakistan Airports Authority (PAA), formerly the Civil Aviation Authority (CAA). As part of a group of engineering interns, the internship provided direct, hands-on exposure to the live mechanical and electromechanical systems that keep a major international airport running continuously around the clock.
The internship covered the Engineering and Maintenance division of the airport — observing and assisting qualified engineers and technicians across multiple system categories, from large-scale HVAC plant rooms to passenger-facing mechanical infrastructure such as escalators, elevators, and baggage conveyor systems.
HVAC Systems
A significant portion of the internship was dedicated to understanding the airport's HVAC (Heating, Ventilation, and Air Conditioning) infrastructure. Observed full-scale HVAC plant room operations including chiller units, air handling units (AHUs), cooling towers, and ductwork distribution across the terminal. Gained practical understanding of temperature zoning, airflow management, and the continuous balancing required to maintain passenger comfort across different terminal areas simultaneously.
Observed how HVAC systems are monitored and adjusted in response to passenger load fluctuations, time of day, and seasonal variations — understanding the engineering decisions behind keeping a large public building at consistent conditions under variable occupancy.
Escalators & Elevators
Assisted the maintenance team during scheduled inspections and troubleshooting of passenger escalators and elevators throughout the terminal. Observed how fault diagnostics are carried out on escalator drive systems, safety interlocks, and step chain mechanisms. Gained exposure to elevator hydraulic and traction systems, including door mechanism alignment, cabin levelling, and safety device testing — all conducted under live airport operational conditions with minimal disruption to passengers.
Baggage Conveyor Systems
Assisted in maintenance and troubleshooting of the airport's baggage conveyor belt systems — the critical infrastructure linking check-in counters, sorting areas, and baggage claim carousels. Observed belt tension adjustment, drive motor inspection, roller replacement procedures, and fault identification during operational hours. Understanding the mechanical and control systems behind high-volume baggage handling provided direct insight into the engineering complexity behind airport ground operations.
Additional Exposure
Beyond the core systems, the internship provided broader exposure to airport engineering operations — including observations of electrical distribution panels and switchgear maintenance, standby generator systems and their testing protocols, fire suppression and safety system checks, and the documentation processes used for maintenance logs and work orders. This gave a holistic understanding of how a large-scale engineering facility is managed and maintained in a 24/7 operational environment.