Grumman A-6 IntruderGrumman A 6 Intruder airplane model. The A 6 Intruder has a rich history, beginning with the USS Independence deploying the first A 6A in 1965. Throughout the conflicts in Southeast Asia, the Intruder played a vital role, with various models proving crucial. The upgraded A 6E, which debuted on February 27, 1970, boasted two robust Pratt & Whitney J52 P 8B turbojets, enabling it to reach incredible speeds of up to 644 mph, a service ceiling of 42,400