Major Defects:

• Major rear For all lamps: an obligatory lamp missing or inoperative Number plate lamp inoperative (63.1.b)
• Major offside Air actuators, hydraulic master & wheel cylinders, valves and servos: defective in operation. (59.5.a.i)
• Major offside All Roller Brake Test Machines: With service brake applied at a steady pedal pressure, the indication of brake effort fluctuates regularly with each brake revolution of the road wheel, on a steered axle, so much that the ovality of any brake drum is obvious. A fluctuation reading in excess of 70%, between highest and lowest indicated readings is to be considered a deficiency. (71.1.c)