CPR PIC ACCEPTS LTT JET AFTER A SCHEDULED MAINT ACTIVITY SUPPOSEDLY CORRECTED ACFT EQUIP PROBS. WRITE OFF IN LOGBOOK AFFECTED THE AIRWORTHINESS STANDARDS OF ACFT WHICH HAD NOT BEEN REPAIRED PROPERLY. POSTFLT INSPECTION REVEALED ACFT MAINT DISCREPANCY.

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I PICKED UP AN ACFT AFTER MAINT FOR AN OIL PRESSURE PROB. I WAS TOLD THAT THE REPAIR WAS EXTENSIVE BUT IT WAS FIXED. THEY ALSO STATED THAT THEY DISCOVERED OTHER DISCREPANCIES; BUT WHEN I TRIED THE COMPONENT OR PROC; THEY WORKED NORMALLY. AS IT TURNED OUT; I FAILED TO FOLLOW A STRICT PROC AS TO PAPERWORK FOR 2 OF THE ITEMS. IN THE OIL REPAIR; I ASSUMED THAT WITH THEIR RELEASE FOR 'MINOR WORK' THAT THE REPAIRS WERE SATISFACTORY. AS IT TURNED OUT; THE COMPLETION OF THE WORK WAS NOT SATISFACTORY. SPECIFICALLY; THE OIL PRESSURE INDICATION WAS NORMAL WHEN RUNNING; BUT WHEN STATIC ENG NOT RUNNING; 9-11 PSI SHOWED ON THE GAUGE. SUBSEQUENT TROUBLE-SHOOTING DETERMINED THAT THE SENDER WAS BAD. IT WAS LATER REPLACED. THEY REQUESTED MY SIGNATURE FOR RELEASE OF THE ACFT. AT THE TIME; I SIGNED FOR AN UNAIRWORTHY ACFT AND FLEW IT; ALTHOUGH I DO NOT BELIEVE THE ACFT WAS UNSAFE; IT WAS BY DEFINITION UNAIRWORTHY. WHEN I SIGNED FOR THE ACFT; I DID NOT REALIZE THIS STATUS. IN RETROSPECT; THE REPAIR FACILITY SHOULD HAVE BEEN VERY SPECIFIC AND STATE THE ACFT IS NOT AIRWORTHY AT THIS TIME INSTEAD OF BEING SO SUBTLE.