'IA' MECH SIGNED OFF AN ACFT ANNUAL INSPECTION WHEN THE ELT (EMER LOCATOR XMITTER) BATTERY WAS EXPIRED.

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ON OR ABOUT NOV/XX/93; WHILE PERFORMING AN ANNUAL INSPECTION ON BEECHCRAFT; A BE-95; IT WAS NOTICED AND NOTED THAT THE ELT BATTERY WAS OUT OF DATE. AS THE AI IN CHARGE OF THE INSPECTION I ASKED THE #1 A AND P TO REMOVE THE ELT AND REPLACE THE BATTERY. HE PASSED IT ALONG TO THE #2 A AND P; WHO WAS THE SON OF THE OWNER. MR X FAILED TO REMOVE THE ELT AND REPLACE THE BATTERY. THE ACFT WAS FERRIED BACK TO MOBILE WHERE IT WAS BASED; AFTER COMPLETING THE PAPERWORK AND SIGNING OFF THE LOGBOOKS. A BREAKDOWN IN THE WORK SCHEDULE BTWN THE 2 A AND P'S AND MY FAILURE TO CHK TO SEE THAT THE WORK HAD BEEN COMPLIED WITH IS A CONTRIBUTING FACTOR. THE INCIDENT WAS DISCOVERED BECAUSE THE ACFT WAS INVOLVED IN AN ACCIDENT NEAR LEAKESVILLE; MS. THE RESULT WAS THE ELT DID NOT ACTIVATE. I CONTACTED BOTH A AND P'S AND INFORMED THEM OF THEIR NEGLIGENCE AND REMINDED THEM OF THEIR OBLIGATIONS TO CARRY OUT THEIR ASSIGNMENTS WITHOUT FAILURE. HUMAN PERFORMANCE CONSIDERATIONS: DECISIONS DONE IN CORRECTIVE ACTIONS; IN CHAIN OF EVENTS SECTION. THE TIME OF THE INSPECTION AFFECTED THE QUALITY OF HUMAN PERFORMANCE. ACTIONS DESCRIBED IN CHAIN OF EVENTS SECTION.