Under the APU exhaust is the AN/AAQ-24(V) Directional Infrared Countermeasure (DIRCM) system for protection from heat seeking missiles. (Photo via b747.org) – 201 SQUADRON ASSOCIATION

Under the APU exhaust is the AN/AAQ-24(V) Directional Infrared Countermeasure (DIRCM) system for protection from heat seeking missiles. (Photo via b747.org)