DO328 CAPT QUESTIONED THE LEGALITY OF A MAINT DEFERRAL OF THE ACFT BLEED AIR VALVES SINCE HE FAILED TO SPECIFY WHICH VALVE WAS DEFECTIVE.

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WROTE UP A MALFUNCTIONING BLEED VALVE. MAINT DEFERRED THE WRONG VALVE. IN PART BECAUSE I MISTAKENLY WROTE A VAGUE DISCREPANCY. IN MY CASE AFTER THE PROB WAS FIXED; I GOT THE LOGBOOK. THE DEFERRAL; ALTHOUGH INCORRECT; WAS THE CORRECTIVE ACTION FOR MY WRITE-UP. IN OUR LOG; ANY DEFERRALS THAT WILL REMAIN IN EFFECT FOR SOME TIME; ARE XFERRED TO THE BACK OF THE LOG ONTO A CARD STOCK PAGE OR 'HARD CARD.' THE LOG CAME BACK TO ME WITH NO MENTION OF THE ORIGINAL CORRECTIVE ACTION BEING INCORRECT. THE MECH TOLD ME; AND I ASKED 3 TIMES; THAT BECAUSE HE XFERRED IT TO THE 'HARD CARD;' HE NEEDED TO WRITE A WORK ORDER TO CLR THE DEFERRAL AND ALL DETAILS INCLUDING THE PROPER CORRECTIVE ACTION WOULD BE DOCUMENTED THERE. I ASKED HIM 2 QUESTIONS: IS THE ACFT AIRWORTHY; AND IS THE PAPERWORK/SIGNOFFS APPROPRIATE AND COMPLETE? WITH THE FO; AS MY WITNESS; HE REPLIED 'YES' TO BOTH QUESTIONS AND ONCE MORE ASSURED ME NO OTHER LOG ENTRIES WERE REQUIRED. HE SAID IT WAS DUE IN PART TO THE ORIGINAL WRITE-UP NOT SPECIFYING WHICH VALVE WAS THE PROB. THE ACFT WAS FIXED AND I WAS SATISFIED THE PAPERWORK WAS COMPLETE. HOWEVER; EVEN WITH THE MECH TAKING RESPONSIBILITY; I WORRY ABOUT THIS COMING BACK ON ME.