Crj-700 flight crew experiences a gld unsafe caution message during taxi out and attempts to reset a...

Narrative:

Taxi out as normal; just before we took off we had a gld unsafe caution message. I looked at the flight control page and selected gld disarm; there was no change in the position; so we decided to pull out of the takeoff line and work the problem out. About the same time my first officer noticed smoke; after he pointed it out the smoke started to get worse. I decided to turn off the packs; I thought that may be where the smoke was coming from. I called the flight attendants and asked them if they had smoke in the cabin. They said they had smoke too. I then decided to evacuate and told the crew to evacuate; we had a jumpseater and he helped us with the evacuation. We started to run our passenger evacuation checklist on the immediate action cards. Flight attendant called to confirm the evacuation and I again confirmed. After we completed the checklist almost all the passengers had been evacuated and the smoke cleared. I checked the airplane for any passengers and handed control to the emergency response unit.maintenance had been working on our display fans. They had replaced and deferred the display fan. When we shut down the airplane the smoke was gone and I suspected that maybe the display fan had caused the smoke. When the mechanics showed up at the plane they checked the smell by the fan and noticed that it still had a strong smoke smell coming from that compartment.

Original NASA ASRS Text

Title: CRJ-700 flight crew experiences a GLD UNSAFE caution message during taxi out and attempts to reset are unsuccessful. Shortly after; smoke with an electrical smell begins filling the flight deck and the Captain orders an evacuation.

Narrative: Taxi out as normal; just before we took off we had a GLD unsafe caution message. I looked at the Flight Control page and selected GLD disarm; there was no change in the position; so we decided to pull out of the takeoff line and work the problem out. About the same time my First Officer noticed smoke; after he pointed it out the smoke started to get worse. I decided to turn off the packs; I thought that may be where the smoke was coming from. I called the flight attendants and asked them if they had smoke in the cabin. They said they had smoke too. I then decided to evacuate and told the crew to evacuate; we had a Jumpseater and he helped us with the evacuation. We started to run our Passenger Evacuation Checklist on the Immediate Action Cards. Flight Attendant called to confirm the evacuation and I again confirmed. After we completed the checklist almost all the passengers had been evacuated and the smoke cleared. I checked the airplane for any passengers and handed control to the emergency response unit.Maintenance had been working on our display fans. They had replaced and deferred the display fan. When we shut down the airplane the smoke was gone and I suspected that maybe the display fan had caused the smoke. When the mechanics showed up at the plane they checked the smell by the fan and noticed that it still had a strong smoke smell coming from that compartment.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1148482
Time
Date	201402
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 700 ER/LR (CRJ700)
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Component
Aircraft Component	Cooling Fan any cooling fan
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Crj-700 flight crew experiences a gld unsafe caution message during taxi out and attempts to reset are unsuccessful. Shortly after; smoke with an electrical smell begins filling the flight deck and the captain orders an evacuation.