As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW RETURNED TO DTW WHEN THEY EXPERIENCED AN OPERATIONAL FAULT WITH THE DE-ICE BOOT. THE LEFT WING OUTBOARD BOOT RUPTURED. THE FLIGHT RETURNED TO DTW WITHOUT FURTHER INCIDENT. REMOVED AND REPLACED LHOB LEADING EDGE, P/N OFF/ON 7257211-513, S/N OFF 2395509, S/N ON 0204666. OPS CHECKS GOOD IAW SF340 AMM 30-10-00-05.