Incident · 1999-05-11

NTSB case DCA99IA058 · Airbus Industrie 300-600 · Part 121

What the record says

Event date: 1999-05-11
Event type: Incident
Highest injury level: No injuries
Aircraft: Airbus Industrie 300-600 (N7082A)
Operating rule: Part 121
Operator: AMERICAN AIRLINES, INC. Operator named in NTSB report
Operated by (per NTSB report): AMERICAN AIRLINES

Probable cause

Uncommanded rudder movement caused by a contaminant in the engagement valve solenoid that prevented disengagement of the autopilot yaw actuator and cross-connected wiring of the autopilot yaw actuator's main valve solenoids by the operator. Factors contributing to the incident were the lack of proper controls in the solenoid assembly process and the lack of procedures to detect miswired solenoids.

Source: NTSB case DCA99IA058

Flight crew

Flight-crew details for this event aren't in the NTSB database extract we hold (its coverage starts with 2008 events) — a gap in our data, not an absence of crew.

Facts as the NTSB records them — GroundCheck adds no judgement. Preliminary records may be revised as the investigation proceeds.

All incidents →