Medium large transport return land when smoke enters the cabin.

Attributes
ACN	247140
Time
Date	199307
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mdt
State Reference	PA
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mdt artcc : zse
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 6200 flight time type : 1000
ASRS Report	247140
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other other : unspecified
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

As we taxied into the gate at the completion of flight and APU bleed air began to supply the airplane, we started to smell a hot, oily smell. The smoke detectors in the aft lavatory began to sound. At the gate, the flight attendants had the last few passenger hurry off the airplane without collecting their carry-ONS. Maintenance looked at the airplane, put the APU on the MEL, and the airplane was dispatched. On climb out of harrisburg, we started to smell the smell, and the aft lavatory smoke detectors again sounded. We returned to harrisburg for landing (with the equipment standing by).

Original NASA ASRS Text

Title: MLG RETURN LAND WHEN SMOKE ENTERS THE CABIN.

Narrative: AS WE TAXIED INTO THE GATE AT THE COMPLETION OF FLT AND APU BLEED AIR BEGAN TO SUPPLY THE AIRPLANE, WE STARTED TO SMELL A HOT, OILY SMELL. THE SMOKE DETECTORS IN THE AFT LAVATORY BEGAN TO SOUND. AT THE GATE, THE FLT ATTENDANTS HAD THE LAST FEW PAX HURRY OFF THE AIRPLANE WITHOUT COLLECTING THEIR CARRY-ONS. MAINT LOOKED AT THE AIRPLANE, PUT THE APU ON THE MEL, AND THE AIRPLANE WAS DISPATCHED. ON CLBOUT OF HARRISBURG, WE STARTED TO SMELL THE SMELL, AND THE AFT LAVATORY SMOKE DETECTORS AGAIN SOUNDED. WE RETURNED TO HARRISBURG FOR LNDG (WITH THE EQUIP STANDING BY).

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.