AIR TAXI HAS ZEUS SCREWS COME LOOSE ON COWLING AT TKOF. RETURN LAND.

Narrative

WHILE TAXIING FOR TKOF JUST PRIOR TO THE BEFORE TKOF CHKLIST THE FLT ATTENDANT CAME TO THE COCKPIT AND SAID; ' PAX SAYS A FASTENER ON THE L COWLING IS LOOSE'. FROM THE COCKPIT I COULD CLRLY SEE THAT BOTH COWL FASTENERS WERE LATCHED AND SECURE; HOWEVER; AFTER SCANNING THE ENTIRE COWLING I COULD SEE 1 ZEUS FASTENER WHICH APPEARED WORN OR MAYBE LOOSE. SINCE IT WAS ONLY 1; AND WOULD NOT EFFECT THE SAFETY OF THE FLT; I ELECTED TO CONTINUE AND TOLD THE FLT ATTENDANT SO (THE ENTIRE CREW AGREED). AFTER TKOF; DURING CLBOUT (WE HAD PERFORMED A MAX PWR TKOF; 1 IN 6 DAYS REQUIRED) I AGAIN LOOKED BACK AT THE COWLING AND SAW ANOTHER ZEUS FASTENER WHICH WORKED ITS WAY LOOSE (POSSIBLY FROM THE VIBRATION OPERATING THE MAX PWR TKOF). AT THIS POINT; ALTHOUGH THE COWLING WAS STILL SECURED AND IN NO DANGER OF COMING LOOSE WE ELECTED TO RETURN TO THE GATE IN ORDER TO VERIFY THAT NO OTHERS HAD WORKED THEIR WAY LOOSE. LNDG AND TAXI IN WERE UNEVENTFUL. AFTER MECH READ DISCREPANCY LOG; HE INSPECTED THE COWL AND PUT THE SCREW DRIVER ON 4 ZEUS FASTENERS. WHETHER ALL 4 WERE LOOSE; OR WHETHER HE WAS CHKING THE 1 ON EACH SIDE OF THE LOOSE (OR WORN) ZEUS FASTENER I AM NOT SURE OF. NONETHELESS THE COWLING WAS NOT UNSECURED NOR IN DANGER OF BECOMING UNSECURED AT ANY POINT. ACFT WAS RETURNED TO SVC (FASTENERS TIGHTENED; NEW RELEASE; WX; ETC) IN 8 MINS AND WE THEN FLEW THE TRIP UNEVENTFULLY.