P,there are usually limits in the Tech.manual as to how long /how wide/where a crack is, as to what you can do in the circumstances.It usually may/will require a suitable hole being drilled at the `head` of the crack to prevent it spreading,or maybe a piece of metal/steel being riveted/bolted over the crack to effect a temporary repair to allow it to be ferried to an engineering base.It may even be able to do a temporary weld,but it depends on the type of metal,and what is allowed in the Tech manual..Try the `Engineers` Forum for `non-pilot advice..!!
ed..It may also be possible to start,take-off and in safe flight ,run the affected engine at idle,then bring it up if needed for landing....
Last edited by sycamore; 20th January 2013 at 11:38.