In case my last statement was taken out of text let me clarify the incidence "An MEL (3 day limit)had previously been applied and on the morning of the forth day was pressured into signing the release.My dummy spit was because we had the spares to rectify the prob but the A/C had overnighted in a minor base (bad planning ! )and when it arrived I was expected to just sign it off and allow the MEL to go on. Was I being pedantic or just covering myself.Eventual outcome was find another to sign !!