Helicopter Westland Whirlwind SRS.2 Serial wa421 Register ZD.1B-20 used by Ejercito del Aire EdA (Spanish Air Force). Aircraft history and location Aircraft History ZD.1B-20 Ejercito del Aire Ejercito del Aire as Z-2, reser Z.1B-20 conv srs.3 c/n wa558 Send Updates Use APP to upload photo @ (optional) When Now? / / Send