A DEHAVILLAND -8 WAS RELEASED FOR SVC BUT WAS RETURNED TO THE GATE DUE TO FINDING AN INCORRECT HIGH PRESSURE HOSE INSTALLED ON #3 BRAKE.

Narrative

ACFT TAXIED TO PARKING POS AND WHEN CAPT APPLIED PARKING BRAKE; #3 BRAKE LOWER FLEX LINE FAILED. I WAS WORKING THE LINE ON ANOTHER ACFT; SO LEAD MECH CALLED ANOTHER MECH ON DUTY TO BRING APPLICABLE LINE FROM MAINT OFFICE WHERE MANUALS AND PARTS ARE STORED. THE FAILED LINE HAD AN ILLEGIBLE ID TAG; BUT IT WAS NOTED DURING INSTALLATION THAT THE REPLACEMENT LINE WAS APPROX 3-4 INCHES SHORTER THAN ORIGINAL. THIS WAS DISCUSSED WITH THE LEAD MECH; BUT ALL AGREED IT HAD TO BE THE PROPER PART NUMBER FROM PAST EXPERIENCE AND MANUAL REF FROM OTHER MECH ON DUTY. PART NUMBER X WAS INSTALLED AND LOGBOOK DISCREPANCY SIGNED OFF; AND ACFT RETURNED TO SVC. UPON RETURN TO THE OFFICE WHERE MANUALS ARE KEPT; FURTHER RESEARCH INDICATED 2 POSSIBLE PART NUMBERS; BASED ON ACFT SERIAL NUMBER. MAINT CTL WAS CALLED; AND ACFT INSTRUCTED TO RETURN TO GATE PRIOR TO FURTHER FLT UNTIL VERIFICATION OF PROPER PART NUMBER. (ACFT NEVER FLEW WITH IMPROPER PART NUMBER LINE.) IT WAS FINALLY VERIFIED THAT PART NUMBER X SHOULD BE INSTALLED. PART WAS SHIPPED IN FROM ANOTHER STATION; IMPROPER LINE WAS REMOVED AND REPLACED PRIOR TO FLT; AND ACFT RETURNED TO SVC.