What was found
DURING HEAVY CHECK, A BLACK SUBSTANCE FOUND ON LT WING FUEL LINE GAMMA CONNECTOR. MX R & R LT WING FUEL LINE CONNECTOR IAW AMM 20-10-13.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING HEAVY CHECK, A BLACK SUBSTANCE FOUND ON LT WING FUEL LINE GAMMA CONNECTOR. MX R & R LT WING FUEL LINE CONNECTOR IAW AMM 20-10-13.