B767-300 and 300 ER
Flight Crew Last 90 Days 180; Flight Crew Total 17658; Flight Crew Type 4200
Situational Awareness; Troubleshooting; Training / Qualification
Aircraft Equipment Problem Less Severe; Deviation - Speed All Types
Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport; General Maintenance Action; General Declared Emergency
Aircraft
'Aileron Lockout' EICAS illuminated through FL210. The entire crew worked the problem including Dispatch and Maintenance. A joint decision based on current information to return to the departure airport for an overweight landing was made. ATC declared an emergency. Due to the overweight condition; a flap 30 limit speed was exceeded momentarily by 10 KTS by flying pilots; a good reason [for us] to have dumped fuel in my opinion.
A B767-300 EICAS alerted AILERON LOCKOUT while climbing after departure so the decision was made to return to the departure airport where an emergency was declared for an overweight landing.