Embraer EMB-145LR N16561 incident near Chicago, Illinois

Probable cause

An in-flight encounter with lightning. Contributing to the incident was the damaged and displaced tailcone bulkhead frame that inhibited the full travel of the elevator during approach.

NTSB analysis

The airplane received minor damage when it sustained a lightning strike while on approach. The flightcrew subsequently encountered elevator control binding, although they were able to land without further incident. Both flightcrew members indicated that the control yoke could be manipulated in the aft direction, but that it would not move forward past about 60-percent deflection. A postaccident inspection of the airplane revealed that the tailcone was damaged. Examination of the damage disclosed that the tailcone's light assembly wiring harness and its respective overbraid shielding were thermally damaged. A bulkhead frame was dislodged from its location due to the thermal damage present on the wiring harness. The dislodged bulkhead came to rest on the elevator's bellcrank, which restricted the flightcrew's ability to control the elevator. Subsequent to the incident, the airplane's manufacturer redesigned the tailcone. The new design incorporates a light assembly secured to the tip of the tailcone by an aluminum retaining strap. In this design four diverters are installed on the exterior tailcone skin which are electrically bonded to the metallic retaining strap of the light assembly and to the metallic bonding plate installed in each side of the fairing.

Text from the NTSB. Open the NTSB docket for CEN10IA157 for the full record.