EMB135 crew was not able to retract the landing gear after an air-ground sensing switch failure.

Attributes
ACN	593877
Time
Date	200309
Day	Thu
Place
Locale Reference	airport : lga.airport
State Reference	NY
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 135 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	593877
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	593876
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : eicas air/gnd fail other flight crewa other flight crewb
Resolutory Action	none taken : unable other
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

After takeoff from lga, we received an EICAS message 'landing gear air-ground failure.' I tried to retract the landing gear, but the gear would not retract. I followed the aom procedure and after completing the aom, I did not divert until I had some more information from dispatch and moc. After receiving this information from dispatch and having enough fuel to continue to boston, this allowed me more time to review the abnormality with the first officer and the flight attendant. The passenger were briefed about the gear. The landing was normal and the message went away on landing. We taxied the aircraft to the gate with no problems. Supplemental information from acn 593876: we continued climb as normal, followed aom procedure. We continued route as planned while contacting maintenance and dispatch. By the time the checklists were complete and we had received relevant information from maintenance/dispatch, we were about 1/2 way to bos and elected to continue with new fuel numbers from dispatch.

Original NASA ASRS Text

Title: EMB135 CREW WAS NOT ABLE TO RETRACT THE LNDG GEAR AFTER AN AIR-GND SENSING SWITCH FAILURE.

Narrative: AFTER TKOF FROM LGA, WE RECEIVED AN EICAS MESSAGE 'LNDG GEAR AIR-GND FAILURE.' I TRIED TO RETRACT THE LNDG GEAR, BUT THE GEAR WOULD NOT RETRACT. I FOLLOWED THE AOM PROC AND AFTER COMPLETING THE AOM, I DID NOT DIVERT UNTIL I HAD SOME MORE INFO FROM DISPATCH AND MOC. AFTER RECEIVING THIS INFO FROM DISPATCH AND HAVING ENOUGH FUEL TO CONTINUE TO BOSTON, THIS ALLOWED ME MORE TIME TO REVIEW THE ABNORMALITY WITH THE FO AND THE FLT ATTENDANT. THE PAX WERE BRIEFED ABOUT THE GEAR. THE LNDG WAS NORMAL AND THE MESSAGE WENT AWAY ON LNDG. WE TAXIED THE ACFT TO THE GATE WITH NO PROBS. SUPPLEMENTAL INFO FROM ACN 593876: WE CONTINUED CLB AS NORMAL, FOLLOWED AOM PROC. WE CONTINUED RTE AS PLANNED WHILE CONTACTING MAINT AND DISPATCH. BY THE TIME THE CHKLISTS WERE COMPLETE AND WE HAD RECEIVED RELEVANT INFO FROM MAINT/DISPATCH, WE WERE ABOUT 1/2 WAY TO BOS AND ELECTED TO CONTINUE WITH NEW FUEL NUMBERS FROM DISPATCH.

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.