Incident AI-ALT-842025 Multi-Channel FDR Scrub
B787-8 FL380 Drop
TIME: 12.0s
EVENT: Autopilot Disengage Trigger
Investigation Causal Classification
UNCOMMANDED_MANUAL_INPUT_WITH_DELAYED_RECOVERY
HIGH_TELEMETRY_MATCH
Telemetry signature reveals manual control force applied prior to AP disengage. First Officer takeover delayed by 6.0 seconds following initial uncommanded nose-down entry.
Counterfactual Signatures
Uncommanded Manual Input
Captain Force Spike + AP Disengage
94%
Autotrim Runaway
Continuous Pitch Trim Drift
18%
Atmospheric Wave Sinks
Rapid External Pressure Drop
42%
Key Telemetry Derived Metrics
Max Altitude Drop:
3,200 ft
Peak Descent Rate:
-6,400 fpm
Co-Pilot Intervention Lag:
6.0 sec
Drop Duration:
42 sec
Cockpit Audit Sequence