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PART I-DESCRIPTIVE

          (iii) If the automatic balancing system, it can be
                overridden by setting the retrim switch in the
                direction of the white indication to RETRIM as
                required. This causes an alternative feed to the
                booster pump speed relays to obtained.

     5.  L.P. fuel cock controls

    (a)  The engine L.P. cock (27) on the port shelf controls the
         flow of fuel from the collector box to the engine-driven
         H.P. pumps and throttle. It is moved forward to on
         and should never be used to stop the engine except in an
         emergency. This cock cannot be set to off without
         moving the reheat L.P. cock to off.

    (b)  The reheat L.P. cock (28) controls the flow of fuel to
         the reheat H.P. pump. The cock should normally be ON
         but may be set to off without affecting the normal engine
         fuel supply (see para. 11).

    (c)  Both L.P. cocks must be off before pressure refuelling is
         possible.

    ENGINE CONTROLS

     6. Avon 114 engine

    (a)  General

         The engine is a 12-stage axial-flow gas turbine develop-
         ing 7,175 lb. static thrust at sea level without reheat and
         9,450 lb. with reheat. The main engine systems
         include:-

              A cartridge starting system. (See para. 7.)

              Relighting facilities. (See para. 8.)

              A high pressure fuel and reheat system. (See paras.
                  10-13.)

              Variable swirl vanes and air bleed valves. (See
                  para. 14.)

              Self-contained oil system.

12

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