2888447 - S11 ENGINE'BUZZING

There is a constant, loud noise coming from the area of the engine, which is only heard within a certain engine speed range
Results of the tests
0PRELIMINARY CHECKAll OKProblems metOperation
Check the condition and seal of the air supply circuitContinue to Step 1Circuit component damagedReplace the component (see Assembly 1048A)
1ENGINE SUPPORT CHECKAll OKProblems metOperation
Check the condition and the correct fixing of the engine supports and flexible mountings and the reaction rodsContinue to Step 2Engine supports faultyBed in the fixings: loosen the bolts, centre them in their housings and tighten them to the recommended torque (see Assembly 1008A)
Flexible mountings faultyBed in the fixings: loosen the bolts, centre them in their housings and tighten them to the recommended torque (see Assembly 1008B)
Reaction rod faultyBed in the fixings: loosen the bolts, centre them in their housings and tighten them to the recommended torque (see Assembly 1008C)
2ENGINE EXHAUST CHECKAll OKProblems metOperation
Check the condition and the correct fixing of the engine exhaust pipe flexible supportsContinue to Step 3Support slack or damagedRestore or replace the support (see Assembly 1076A)
Pipe, silencer or connector damagedReplace the components (see Assembly 1076B)
3CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'