As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT DUCT LEAK ILLUMINATED IN FLIGHT. RAN QRH PROCEDURES. DID PRECAUTIONARY SHUT DOWN AND RESTART, LIGHT ILLUMINATED AGAIN. SHUT DOWN NR 2 ENGINE AND SHOT SINGLE ENGINE APPROACH. FOUND RIGHT DEICE REGULATOR DRAIN BOWL BLOWN OFF REGULATOR. REPLACED RIGHT DEICE PRESSURE REGULATOR. REINSTALLED REGULATOR DRAIN BOWL. RAN BOTH ENGINES AND BLEEDS FOR 10 MIN AT SEVERAL POWER SETTINGS. ALL CHECKS GOOD. S/N ON RF-2238.