Brewer-E aircraft has multitude of antennas and dielectric panels to cause interference in the enemy electronic equipment, and a heat exchanger to dissipate the excess heat generated was installed on the belly of the aircraft.It is unknown how many Yak-28PP aircrafts were manufactured, but surely there were not many. Although the rest of Yak-28 were deactivated in early 1980s, the Brewer-E variant remained in service until the mid-1990s, when they were replaced by the most capable Su-24MP Fencer-E.
