The Lockheed Martin A-4AR Fightinghawk is a major upgrade of the McDonnell Douglas A-4M Skyhawk attack aircraft developed for the Argentine Air Force which entered service in 1998.
The upgrade plans included:
Complete overhaul of the airframe, wiring looms and the Pratt & Whitney J52P-408A engine
Installation of Douglas Escapac 1-G3 ejection seats
HGU-55/P helmets
Honeywell Normal Air-Garrett's OBOGS (On Board Oxygen Generation System)
Westinghouse/Northrop Grumman AN/APG-66V2 (ARG-1) radar
HOTAS controls and a 'glass' cockpit (2 CRT color screens)
Sextant Avionique/Thales Avionics SHUD
Litton/Northrop Grumman LN-100G inertial navigation system
MIL-STD-1553B data bus
Two General Dynamics Information Systems AN/AYK-14 mission computers
Northrop Grumman AN/ALR-93 (V)1 Radar warning receiver
AN/ALQ-126B jammer
AN/ALQ-162 jammer
ALR-47 chaff/flare dispenser
IFF AN/APX-72.
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