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EMB140 flight crew has an EICAS warning 'landing gear air-ground fail' during takeoff; declares emergency and returns for landing.
| Attributes | |
| ACN | 693523 |
| Time | |
| Date | 200604 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 100 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 140 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| ASRS Report | 693523 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | aircraft equipment other aircraft equipment : eicas warning other flight crewa other flight crewb |
| Resolutory Action | flight crew : landed as precaution flight crew : declared emergency flight crew : diverted to another airport other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
On rotation EICAS showed 'landing gear air-ground fail' message. Landing gear did not retract. I was the PNF at the time. As PNF I ran the appropriate checklist. Per aom; we maintained VFR conditions; avoiding icing conditions. Gear was left in down position. Advised ATC and flight attendant with intentions. The captain tried to contact maintenance with no success. ACARS messages were sent to operations with stated intention to return to ZZZ for landing and ETA. Reduced landing weight by taking radar vectors by ATC to burn approximately 800 pounds of fuel. During this phase of flight the flight attendant and passenger were briefed by the captain while I took control of the aircraft. Once the landing weight was reduced within the maximum; allowed for landing; we calculated the new landing distance (unfactored landing distance multiplied by 1.45) and -- as a precaution -- we declared emergency with ATC.
Original NASA ASRS Text
Title: EMB140 FLT CREW HAS AN EICAS WARNING 'LNDG GEAR AIR-GND FAIL' DURING TKOF; DECLARES EMER AND RETURNS FOR LNDG.
Narrative: ON ROTATION EICAS SHOWED 'LNDG GEAR AIR-GND FAIL' MESSAGE. LNDG GEAR DID NOT RETRACT. I WAS THE PNF AT THE TIME. AS PNF I RAN THE APPROPRIATE CHKLIST. PER AOM; WE MAINTAINED VFR CONDITIONS; AVOIDING ICING CONDITIONS. GEAR WAS LEFT IN DOWN POS. ADVISED ATC AND FLT ATTENDANT WITH INTENTIONS. THE CAPT TRIED TO CONTACT MAINT WITH NO SUCCESS. ACARS MESSAGES WERE SENT TO OPS WITH STATED INTENTION TO RETURN TO ZZZ FOR LNDG AND ETA. REDUCED LNDG WT BY TAKING RADAR VECTORS BY ATC TO BURN APPROX 800 LBS OF FUEL. DURING THIS PHASE OF FLT THE FLT ATTENDANT AND PAX WERE BRIEFED BY THE CAPT WHILE I TOOK CTL OF THE ACFT. ONCE THE LNDG WT WAS REDUCED WITHIN THE MAX; ALLOWED FOR LNDG; WE CALCULATED THE NEW LNDG DISTANCE (UNFACTORED LNDG DISTANCE MULTIPLIED BY 1.45) AND -- AS A PRECAUTION -- WE DECLARED EMER WITH ATC.
Data retrieved from NASA's ASRS site as of January 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.