A B727-200 is evacuate/evacuationed when smoke is detected in the aircraft's cabin after a return land. Aircraft's return mandated by a failure of the air-ground sensor and being unable to raise the gear near lga, ny.

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Attributes
ACN	466538
Time
Date	200003
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lga.airport
State Reference	NY
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	landing : roll other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 220 flight time total : 28000 flight time type : 9000
ASRS Report	466538
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : diverted to another airport flight crew : landed as precaution other
Consequence	other
Supplementary
Problem Areas	Cabin Crew Human Performance Flight Crew Human Performance Environmental Factor Aircraft
Primary Problem	Aircraft

Narrative:

After takeoff, gear failed to retract. Apparent cause was failed air-ground sensor. We dumped 23000 pounds of fuel prior to a normal approach and landing. While on runway awaiting gear pin installation, smoke appeared in cabin. Aircraft was evacuate/evacuationed via main door and slides. Air-ground sensor failure caused air conditioning pack cooling fans to fail causing smoke in cabin. I chose to evacuate/evacuation via main doors only due to large number of young children (approximately 40 out of 139 passenger) on board. Emergency personnel were adjacent to the aircraft at time of evacuate/evacuation. No injuries reported.

Original NASA ASRS Text

Title: A B727-200 IS EVACED WHEN SMOKE IS DETECTED IN THE ACFT'S CABIN AFTER A RETURN LAND. ACFT'S RETURN MANDATED BY A FAILURE OF THE AIR-GND SENSOR AND BEING UNABLE TO RAISE THE GEAR NEAR LGA, NY.

Narrative: AFTER TKOF, GEAR FAILED TO RETRACT. APPARENT CAUSE WAS FAILED AIR-GND SENSOR. WE DUMPED 23000 LBS OF FUEL PRIOR TO A NORMAL APCH AND LNDG. WHILE ON RWY AWAITING GEAR PIN INSTALLATION, SMOKE APPEARED IN CABIN. ACFT WAS EVACED VIA MAIN DOOR AND SLIDES. AIR-GND SENSOR FAILURE CAUSED AIR CONDITIONING PACK COOLING FANS TO FAIL CAUSING SMOKE IN CABIN. I CHOSE TO EVAC VIA MAIN DOORS ONLY DUE TO LARGE NUMBER OF YOUNG CHILDREN (APPROX 40 OUT OF 139 PAX) ON BOARD. EMER PERSONNEL WERE ADJACENT TO THE ACFT AT TIME OF EVAC. NO INJURIES RPTED.

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.