A320 flight crew has an ECAM 'avionics smoke' warning; diverts for landing.

Attributes
ACN	733038
Time
Date	200703
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mmpr.airport
State Reference	FO
Altitude	msl single value : 15000
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	733038
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe other anomaly other anomaly
Independent Detector	aircraft equipment other aircraft equipment : ecam other flight crewa other flight crewb
Resolutory Action	aircraft : equipment problem dissipated flight crew : declared emergency flight crew : diverted to another airport flight crew : landed as precaution
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

While on the ramp at mmpr we got a 'avionics smoke' ECAM. I checked outside and didn't see or smell anything around the nose of the aircraft or coming from the avionics bay exhaust. After about 5 minutes; the ECAM went away by itself. I called maintenance and told them what happened. They told me to write an information only entry in the log book. Departed mmpr. Approximately 15 minutes into flight we got a 'avionics smoke' ECAM. We did not smell or see any smoke. All the radios and equipment operated normally. We conferred with maintenance control and because the ECAM did not go away we returned to mmpr. During the approach to mmpr the 'avionics smoke' ECAM went away on its own. We did a go around with the flaps and gear down to burn off a little fuel and get closer to landing weight. Landing was normal 145500 pounds at 200 FPM at touchdown. Maintenance at mmpr later found defective ventilation blower fan.

Original NASA ASRS Text

Title: A320 FLT CREW HAS AN ECAM 'AVIONICS SMOKE' WARNING; DIVERTS FOR LNDG.

Narrative: WHILE ON THE RAMP AT MMPR WE GOT A 'AVIONICS SMOKE' ECAM. I CHECKED OUTSIDE AND DIDN'T SEE OR SMELL ANYTHING AROUND THE NOSE OF THE ACFT OR COMING FROM THE AVIONICS BAY EXHAUST. AFTER ABOUT 5 MINUTES; THE ECAM WENT AWAY BY ITSELF. I CALLED MAINT AND TOLD THEM WHAT HAPPENED. THEY TOLD ME TO WRITE AN INFO ONLY ENTRY IN THE LOG BOOK. DEPARTED MMPR. APPROX 15 MINUTES INTO FLIGHT WE GOT A 'AVIONICS SMOKE' ECAM. WE DID NOT SMELL OR SEE ANY SMOKE. ALL THE RADIOS AND EQUIPMENT OPERATED NORMALLY. WE CONFERRED WITH MAINT CONTROL AND BECAUSE THE ECAM DID NOT GO AWAY WE RETURNED TO MMPR. DURING THE APPROACH TO MMPR THE 'AVIONICS SMOKE' ECAM WENT AWAY ON ITS OWN. WE DID A GO AROUND WITH THE FLAPS AND GEAR DOWN TO BURN OFF A LITTLE FUEL AND GET CLOSER TO LANDING WT. LANDING WAS NORMAL 145500 LBS AT 200 FPM AT TOUCHDOWN. MAINT AT MMPR LATER FOUND DEFECTIVE VENTILATION BLOWER FAN.

Data retrieved from NASA's ASRS site as of January 2009 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.