The environmental control system provides air supply, thermal control and cabin pressurization for the crew and passengers.
Avionics cooling, smoke detection, and fire suppression are also commonly considered part of an aircraft's environmental control system.
Pre-bid conference is scheduled for March 30 at 11 a.m.at the PAF Procurement Center Conference Room, Villamor Air Base, Pasay City. On the other hand, bid opening and submission is scheduled for April 14 at 9 a.m. at the same venue.
Prospective bidders should have an experience in similar project within the last five years.
The PAF operates three to five S-211s and uses it for air defense and attack missions.
Philippine Air Force SIAI-Marchetti S.211 jet trainer / Light attack aircraft. The Philippine Air Force has 25 aircrafts, including one partially completed airframe for spare parts and 15 assembled locally by Philippine Aerospace Development Corporation. Due to accidents, 13 remain in inventory, 5 in active service as of September 2013.