What was found
ON DELIVERY OF NEW A/C, DAY ACCEPTANCE CHECK CARRIED OUT AND A/C ACCEPTED. DURING NIGHT FLYING LT WINDSCREEN OBSERVED TO HAVE PARALLAX DISTORTION ERROR. DAY TESTS CARRIED OUT OF GRID TEST AND WATER TEST. WINDSCREEN CERTIFIED SERVICEABLE BY VENDOR & MANUFACTURERS ENGINEERS. PILOTS INSISTED CHECK BE CARRIED OUT AT NIGHT BY TEST PILOT, OVERRIDING INSISTENCE BY ENGINEERS ON WINDSCREEN HAVING NO DEFECT & BEING SERVICEABLE. TEST PILOT CONFIRMED DEFECT. WINDSCREEN CHANGED.PRESENT DAY TESTS ONLY FOR WINDSCREEN PARALLAX & DISTORTIONS INADEQUATE TO DETECT THESE FLAWS WHICH CAN ONLY BE DETECTED AT NIGHT. CESSNA INDICATES THIS IS THE FIRST CASE DETECTED. SINCE THE PRESENT DAY TESTS ONLY CANNOT DETECT THIS FLAW/DE