Incident Overview
While the aircraft was stationary on the ramp following landing, the flight crew initiated the auxiliary power unit (APU). Approximately 30 seconds later, smoke began to enter the passenger cabin. In response, the captain directed an emergency evacuation using the aircraft's four evacuation slides. All slides deployed and operated as designed.
Injuries and Damage
During the evacuation, one passenger sustained a fractured bone in her right foot. No other injuries were reported. Subsequent examination of the aircraft revealed a broken hydraulic line. The failure allowed hydraulic fluid to collect in the vicinity of the APU inlet, which was the source of the smoke.
Investigation Findings
The physical inspection identified a rupture in a hydraulic line. The resulting fluid accumulation near the APU intake was consistent with the smoke observed in the cabin. No further causal factors were identified in the source material.