<< >> NASA ASRS Report 300501, March 1995

In-flight fire - the cargo smoke and fire warnings activate on a freighter and the flight crew returns and lands.

Attributes
ACN	300501
Time
Date	199503
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ort
State Reference	AK
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : czeg
Operator	common carrier : air carrier
Make Model Name	B747-C/F
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute airway : czeg
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : flight engineer
Experience	flight time last 90 days : 140 flight time total : 8000
ASRS Report	300501
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 13000
ASRS Report	300495
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Approximately 1 hour out of anc the #4 smoke detector light on the main deck illuminated along with the fire warning on glare shield (horn sounded). We initiated communication procedure and noticed light went out per procedure we went back to anc. I (so) inspected the main deck cargo area and noticed a smell similar to nail polish at 17L/right zone. Flight back to anc was uneventful. Maintenance could not duplicate smoke detector coming on during ground time. Replaced detector.

Related reports:

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Original NASA ASRS Text

Title: INFLT FIRE - THE CARGO SMOKE AND FIRE WARNINGS ACTIVATE ON A FREIGHTER AND THE FLC RETURNS AND LANDS.

Narrative: APPROX 1 HR OUT OF ANC THE #4 SMOKE DETECTOR LIGHT ON THE MAIN DECK ILLUMINATED ALONG WITH THE FIRE WARNING ON GLARE SHIELD (HORN SOUNDED). WE INITIATED COM PROC AND NOTICED LIGHT WENT OUT PER PROC WE WENT BACK TO ANC. I (SO) INSPECTED THE MAIN DECK CARGO AREA AND NOTICED A SMELL SIMILAR TO NAIL POLISH AT 17L/R ZONE. FLT BACK TO ANC WAS UNEVENTFUL. MAINT COULD NOT DUPLICATE SMOKE DETECTOR COMING ON DURING GND TIME. REPLACED DETECTOR.

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.