Procedure of Tightening the Tie Bolt

When checking the tightness of tie bolts, refer to manufacturers instructions for tightening pressures for the jacks and the order in which to carry out the check. The normal order is to start at the centre and work outwards checking the bolts in pairs. The MC -C engine with its twin tie bolts is an exception, starting at the fwd end and working aft. If the engine is fitted with bearing jacking bolts, then these must be slackened before tightening the tie bolts.

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