B757-200
Flight Crew Air Transport Pilot (ATP)
Training / Qualification; Troubleshooting; Situational Awareness
Aircraft Equipment Problem Less Severe
Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport; General Declared Emergency; General Release Refused / Aircraft Not Accepted
Aircraft
'Nose A/G DISAGREE' status message appeared after takeoff. Climbing out; we consulted the QRH. Concerned that this switch controls 'stall warning and portions of the caution and warning system'; we discussed our problem with this airport's Maintenance and Maintenance Control. They advised us to return to the departure airport and we concurred. Dispatch was notified of our return and an emergency was declared with ATC. We landed overweight; normal touchdown; long rollout; minimal braking with Airfield Rescue and Fire Fighters standing by to monitor brake temps (all OK). Arriving at gate; Maintenance advised us that the nose gear air/ground switch was broken and removed the aircraft from service.
[Narrative #2 contained no additional information.]
After takeoff a B757 EICAS alerted NOSE A/G DISAGREE so an emergency was declared and the flight returned to the departure airport.