What was found
(CAN) WE HAVE FOUND CHAFING AT YW279 LT & RT ON THE WING REAR SPAR CAP, BEHIND THE NR 1 AND NR 4 NACELLES. THIS CHAFING IS CAUSED BY A WIRE BUNDLE IN BOTH LOCATIONS. WE HAVE SEEN THIS DAMAGE IN THREE EARLIER MAINTENANCE PROJECTS, ON THE FOLLOWING AIRCRAFT:(1) DHC-7 S/N 036 (GJPI) TSN: 24486.6 CSN: 43093(2) DHC-7 S/N 037 (GFOF) TSN: 30142.1 CSN: 42908(3) DHC-7 S/N 63 (GCEV) TSN: 33390.4 CSN: 32682IN ALL CASES, THE DAMAGE WAS ADDRESSED WITH A REPAIR SCHEME PROVIDED BY DEHAVILLAND.