A B747-400 flight crew on an overwater flight experienced 'smoke DR5 rest area' master caution. They coordinated with maintenance; shut off recirc fans; and proceeded to destination with no further issues.

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Attributes
ACN	787111
Time
Date	200805
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zoa.artcc
State Reference	CA
Altitude	msl single value : 36000
Aircraft 1
Controlling Facilities	artcc : zoa.artcc
Operator	common carrier : air carrier
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 240 flight time total : 14000 flight time type : 2500
ASRS Report	787111
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe other anomaly
Independent Detector	aircraft equipment other aircraft equipment : eicas other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

I was asleep on my break. Smoke DR5 rest EICAS; master caution. After fans automatic shutdown; EICAS message cleared. Relief pilots accomplished smoke DR5 irregular procedures; advised flight attendants. Purser and 5 other flight attendants inspected rest area; entire cabin; galleys; and lavatories. No signs of smoke or fire noted. Reset fans using fan reset at DR5 rest area. Lower recirculation fans resumed operation. Within 15 seconds; EICAS message returned. Concurrently; first officer noticed odor. Fans automatic shutdown again. Relief pilots woke me up at this point. Conferred with maintenance. Per maintenance; turned off both upper and lower recirculation fans and recycled circuit breaker F4 to restore smoke detector capability. Flew rest of flight with recirculation fans off. No further EICAS messages or indications of smoke/fire observed. Landed normally at destination.

Original NASA ASRS Text

Title: A B747-400 FLT CREW ON AN OVERWATER FLT EXPERIENCED 'SMOKE DR5 REST AREA' MASTER CAUTION. THEY COORDINATED WITH MAINT; SHUT OFF RECIRC FANS; AND PROCEEDED TO DEST WITH NO FURTHER ISSUES.

Narrative: I WAS ASLEEP ON MY BREAK. SMOKE DR5 REST EICAS; MASTER CAUTION. AFTER FANS AUTO SHUTDOWN; EICAS MESSAGE CLRED. RELIEF PLTS ACCOMPLISHED SMOKE DR5 IRREGULAR PROCS; ADVISED FLT ATTENDANTS. PURSER AND 5 OTHER FLT ATTENDANTS INSPECTED REST AREA; ENTIRE CABIN; GALLEYS; AND LAVATORIES. NO SIGNS OF SMOKE OR FIRE NOTED. RESET FANS USING FAN RESET AT DR5 REST AREA. LOWER RECIRCULATION FANS RESUMED OP. WITHIN 15 SECONDS; EICAS MESSAGE RETURNED. CONCURRENTLY; FO NOTICED ODOR. FANS AUTO SHUTDOWN AGAIN. RELIEF PLTS WOKE ME UP AT THIS POINT. CONFERRED WITH MAINT. PER MAINT; TURNED OFF BOTH UPPER AND LOWER RECIRCULATION FANS AND RECYCLED CIRCUIT BREAKER F4 TO RESTORE SMOKE DETECTOR CAPABILITY. FLEW REST OF FLT WITH RECIRCULATION FANS OFF. NO FURTHER EICAS MESSAGES OR INDICATIONS OF SMOKE/FIRE OBSERVED. LANDED NORMALLY AT DEST.

Data retrieved from NASA's ASRS site as of May 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.