Flight and Hydraulic Issues
During flight, a decrease in utility hydraulic fluid quantity was noted. The engine-driven pumps were shut off until just before landing. After extending the gear and flaps, the quantity indicated 3.5 gallons and all pressures were normal.
Landing Roll and Reverser Anomalies
After touchdown, the #1 reverser light was slow to illuminate. Reportedly, reverse thrust was delayed on the #1 and #4 engines until all reverser lights were on. The landing roll was reported as normal until the speed slowed to about 80 knots, then the airplane began veering right.
Loss of Control and Runway Excursion
The captain stated he had no left braking or nose wheel steering. The airplane continued off the runway and the left gear collapsed. After stopping, the fire bottles were used when smoke was observed from the #1 engine.
Post-Accident Findings
Left and right tire marks were found that were 1245 and 870 feet long, both with signs of intermittent intensity. The nose wheel steering and spoilers operated when the utility hydraulic system was first powered by the aux pump.
Mechanical Failure
A stress corrosion crack was found where the left main gear sidebrace had failed.