As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) TANK WOULD ALWAYS POP OR OIL CAN AS IT WAS FILLED, LEAK WOULD ONLY OCCUR WHEN TANK WAS FUELLED RIGHT TO THE TOP. IT IS BELIEVED THAT THE REPETITIVE OIL CANNING OF THE TANK CAUSED A FATIQUE CRACK TO START. THE TANK WAS REPAIRED AND THE UPPER SURFACE WAS CONTOURED BACK TO ITS ORIGINAL SHAPE SO IT WILL NOT OIL CAN ANY LONGER.