What was found
A220-100 / NOSE FUSELAGE / CANOPY AND FRAME 10 / DENTS ****DTE/DATA REQUIRED. REPAIR APPROVAL IS LIMITED TO 12 MONTHS. ADDITIONAL ENGINEERING AUTHORIZATION (ER/A REVISION) IS REQUIRED FOR CONTINUED SERVICE OF THIS REPAIR LONGER THAN 12 MONTHS FROM REPAIR ACCOMPLISHMENTS . DAMAGE TOLERANCE ANALYSIS IS REQUIRED IN ACCORDANCE WITH PROCEDURES ESTABLISHED BY FAA ADVISORY CIRCULAR 120-93. ASSOCIATED ER/A 14-593942 ADDED FOR AC 8104. (LP# 1940071, 1937271, 1937273).