A B757 departing ord had strong smell and lavatory smoke detector chime on climb out.

Attributes
ACN	424136
Time
Date	199812
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	msl bound lower : 10000 msl bound upper : 10000
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : initial
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	424136
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	other anomaly other
Independent Detector	other other : unspecified cockpit other other : unspecified
Resolutory Action	controller : issued new clearance
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

XX10Z, ord departure, 10000 ft. On departure roll at ord, smelled fumes, similar to hot pack, climbing through 10000 ft. Flight attendant informed us of strong smell of hot fumes in cabin and lavatory smoke detector chiming. Fumes were distinctly noticeable in cockpit also. Donned oxygen masks, declared emergency, returned to ord. Odor of fumes dissipated. Elected not to evacuate/evacuation after further assessment from cabin and ord crash fire rescue equipment. Upon arrival at gate, maintenance found fault message 'forward equipment detection.' landed overweight. Supplemental information from acn 425163: 5 mins after takeoff, into the climb, the smoke detector in the lavatory behind first class sounded. There was no smoke or fire. However, there was an electrical smell in that immediate area. The captain was forced to communicate with the #1 flight attendant via the PA system.

Original NASA ASRS Text

Title: A B757 DEPARTING ORD HAD STRONG SMELL AND LAVATORY SMOKE DETECTOR CHIME ON CLBOUT.

Narrative: XX10Z, ORD DEP, 10000 FT. ON DEP ROLL AT ORD, SMELLED FUMES, SIMILAR TO HOT PACK, CLBING THROUGH 10000 FT. FLT ATTENDANT INFORMED US OF STRONG SMELL OF HOT FUMES IN CABIN AND LAVATORY SMOKE DETECTOR CHIMING. FUMES WERE DISTINCTLY NOTICEABLE IN COCKPIT ALSO. DONNED OXYGEN MASKS, DECLARED EMER, RETURNED TO ORD. ODOR OF FUMES DISSIPATED. ELECTED NOT TO EVAC AFTER FURTHER ASSESSMENT FROM CABIN AND ORD CFR. UPON ARR AT GATE, MAINT FOUND FAULT MESSAGE 'FORWARD EQUIP DETECTION.' LANDED OVERWT. SUPPLEMENTAL INFO FROM ACN 425163: 5 MINS AFTER TKOF, INTO THE CLB, THE SMOKE DETECTOR IN THE LAVATORY BEHIND FIRST CLASS SOUNDED. THERE WAS NO SMOKE OR FIRE. HOWEVER, THERE WAS AN ELECTRICAL SMELL IN THAT IMMEDIATE AREA. THE CAPT WAS FORCED TO COMMUNICATE WITH THE #1 FLT ATTENDANT VIA THE PA SYS.

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.