As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON ENGINE START, SKYDROL FUMES FILLED THE AFT THIRD OF THE CABIN. INSPECTED A/C AND FOUND A B-NUT LEAKING HYDRAULIC FLUID BEHIND AFT PIT WALL. REMOVED AND REPLACED LINE WITH A FLEX LINE IN ACCORDANCE WITH MM 20-10-10. SECURED LINE AND LEAK CHECKED WITH ENGINE RUNNING. REMOVED FLEX LINE AND INSTALLED A RIGID LINE ON 5/23/96.