Air carrier widebody transport diverted to altitude when avionics compartment smoke warning was acti...

Attributes
ACN	155200
Time
Date	199008
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mia
State Reference	FL
Altitude	msl bound lower : 35000 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma tower : ekm
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute airway : zma
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 15000 flight time type : 1200
ASRS Report	155200
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	aircraft : equipment problem dissipated flight crew : overcame equipment problem flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

During cruise at FL350 the avionic smoke warning went off. While the first officer handled the checklist, I declared an emergency and ZMA cleared us to pta. A short time later the min equipment bay smoke alarm went off. ZMA suggested pls. At 120 NM we began a descent to pls and after doing checklist and about 10 or 15 mins both warnings disappeared. A trace of smoke was present. An uneventful landing was made. The aircraft shutdown completely on the ramp and the 168 passenger were disembarked via pay stand.

Original NASA ASRS Text

Title: ACR WDB DIVERTED TO ALT WHEN AVIONICS COMPARTMENT SMOKE WARNING WAS ACTIVATED.

Narrative: DURING CRUISE AT FL350 THE AVIONIC SMOKE WARNING WENT OFF. WHILE THE F/O HANDLED THE CHKLIST, I DECLARED AN EMER AND ZMA CLRED US TO PTA. A SHORT TIME LATER THE MIN EQUIP BAY SMOKE ALARM WENT OFF. ZMA SUGGESTED PLS. AT 120 NM WE BEGAN A DSNT TO PLS AND AFTER DOING CHKLIST AND ABOUT 10 OR 15 MINS BOTH WARNINGS DISAPPEARED. A TRACE OF SMOKE WAS PRESENT. AN UNEVENTFUL LNDG WAS MADE. THE ACFT SHUTDOWN COMPLETELY ON THE RAMP AND THE 168 PAX WERE DISEMBARKED VIA PAY STAND.

Data retrieved from NASA's ASRS site as of July 2007 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.

Air carrier widebody transport diverted to altitude when avionics compartment smoke warning was activated.