As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKE-OFF - PTU FAIL LIGHT ILLUMINATED. HYDRAULIC PRESSURE & QUANTITY INDICATED NORMAL. RAN CHECKLIST - DID NOT SELECT PTU FOR LANDING. PTU FAIL LIGHT EXTINGUISHED ON LANDING. REMOVED FROM SERVICE. C/W Q400 FIM TASK 29-30-00-810-819, STEPS 1 THRU 3.A AND 5. DURING PTU FUNCTIONAL TEST REF Q400 AMM 29-11-61-720-801, STEPS 1 THRU 3, 4.D AND 5 - FOUND LEAK FROM LOOSE HYDRAULIC LINE AT PTU PRESSURE SWITCH. TORQUED LINE - FUNCTIONAL TEST GOOD. RETURNED TO SERVICE.