HAECO's heavy maintenance hangars at the Hong Kong International Airport, Chek Lap Kok, are amongst the most technologically advanced in Asia.  Representing a total investment of HK$1.6 billion, the 61,000 sqm facilities are located at the western end of the airport between two runways. The first single, three-bay hangar gives a column-free working area of 18,000 sqm, allowing it to accommodate three B747-400 aircraft fully docked and additional two aircraft nose-in and fully enclosed by unique mobile tail enclosures providing full empennage access staging.  The second 13,000 sqm hangar can simultaneously provide two wide-bodied, plus one 767-sized aircraft maintenance positions.

The hangars are supported by a full range of component overhaul and repair workshops, test laboratories, bonded storage for airline spares, as well as office and administration buildings. It also has two dedicated paint bays which meet international environmental specifications.

HAECO has reached an agreement with the Airport Authority Hong Kong to construct a third hangar in two phases - first phase of the new facility which encompasses an area of 15,750 sqm is capable of accommodating two wide-bodied aircraft and is officially opened on September 2009. The second phase of the third hangar will be completed in 2015.  The total added site area on which the new hangars will be built is 26,550 sqm, which is a very considerable 43% increase on the footprint for the first two hangars.   As part of the agreement, the master franchise under which HAECO operates both line and base maintenance will also be extended by five years to 2036, subject to certain conditions.

To ensure customers' on-time departure and maintenance requirements, a total floor area of 8,400 sqm line maintenance facility is built at the very center of the Airport Terminal, providing right resources at the right time.  It consists of a maintenance control centre, workshops, tool rooms, line maintenance terminal stores and ramp equipment/service control centers providing 24/7 maintenance operation.  HAECO Tech III Cargo Line Maintenance Facility located at Cargo aprons, is responsible for all transit and daily checks with a dedicated maintenance team.  It consists of a maintenance control center, tool room, and a storage facility.

The Company's Component and Avionics Overhaul (CAO) facility is situated at Tseung Kwan O Industrial Estate, which is 50 km east of Hong Kong International Airport. It is a purpose-built building of 7,000 sqm of usable workshop space which houses component overhaul and avionics workshops and a Calibration & Metrology Centre.