Document ID: chunk:federal_register_of_legislation:F2007L00880:body:0:p2
Version: federal_register_of_legislation:F2007L00880
Segment Type: other
Provision Reference: 
Character Range: 2811–3835

a maintenance scheduled check of these controls.  The jamming originates from the relevant tangential gearboxes.  In both cases, the grease in the left tangential gearbox solidified and in one of the two cases, the right tangential gearbox showed traces of extensive corrosion.

             The jamming of the fuel shut-off control prevents:

                    * the fuel cock at the engine inlet from closing and may thus maintain a fire,

                    * the engine compartment ventilation flap from closing, which can reduce the efficiency of the extinguishing agent, in the event of firing after fire alarm,

                    * operation of the general cut-off control so that switching-off the electrical power system may become impossible if needed.

             This AD therefore requires operators to carry out a functional check of the fuel shut-off controls and to recondition and grease the tangential gearboxes.

Charles Lenarcic
Delegate of the Civil Aviation Safety Authority

29 March 2007