Narrative:

During taxi on ground in ZZZ. We got EICAS message 'flap low speed' contacted soc/moc. Returned to gate to have contract maintenance look at it. They MEL'd one of the flap channels and we took off and departed to ZZZ1. En route crew decided to review the flap failure aom vol 1 procedure just in case. On climb out from ZZZ, flaps retracted slowly but came up just fine. On descent into ZZZ1 we rebriefed the no flaps procedure just as a precaution and briefed the fact that the flaps should be selected early since they were operating slow. Flaps went into the 9 degree position slowly but indicating 9 degree when selected on initial approach into ZZZ1. When turning final just outside the marker for runway 22L in ZZZ1 the flaps were selected to 22. We did not get a flaps fail indication on EICAS but we did get a 'sps advanced' message and the flap position box on EICAS turned amber with an amber dash. There was not enough time to visually check the wing indicator but the rmu flap indicator page showed no position indication just amber dash. Weather was VFR. We were lined up on final just outside marker so I decided to declare a no flap emergency as a precaution and to continue to land. We had already reviewed the aom vol 1 procedure twice and knew the landing distance and reference speeds so I quickly briefed the flight attendant on short final and said we did not anticipate a problem but I wanted to keep him informed. Emergency was declared with the tower at about the marker I considered going around but did not want to go around with an intermediate flap position in a very bumpy air. Landing was uneventful. Passenger were not aware of emergency. There was flap failure. Flap failure uneventful. I figured it would have been somewhere between the 9 and 22 position and used the appropriate criteria from the aom vol 1 procedure that we had previously briefed. The touchdown was somewhere around 170 KIAS and the landing was smooth and uneventful. Callback conversation with reporter revealed the following information: the reporter stated the maintenance action taken is unknown as maintenance does not report the corrective action to the flight crews. The reporter said the only warning we had was the EICAS message 'low flap speed' and that due to deferring one flap channel prior to departure. The reporter stated the embraer 135,140 and the 145 all have troubles with the trailing edge flaps control and indication. The reporter said the company is working on the problem but has had no success. The reporter stated the airplanes have a flap maintenance history.

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Original NASA ASRS Text

Title: AN EMBRAER 145 ON SHORT FINAL DECLARED AN EMER DUE TO TRAILING EDGE FLAP CTL FAILURE. FLAP EXTENSION FAILED BETWEEN 9 AND 22 UNITS.

Narrative: DURING TAXI ON GND IN ZZZ. WE GOT EICAS MSG 'FLAP LOW SPD' CONTACTED SOC/MOC. RETURNED TO GATE TO HAVE CONTRACT MAINT LOOK AT IT. THEY MEL'D ONE OF THE FLAP CHANNELS AND WE TOOK OFF AND DEPARTED TO ZZZ1. ENRTE CREW DECIDED TO REVIEW THE FLAP FAILURE AOM VOL 1 PROC JUST IN CASE. ON CLB OUT FROM ZZZ, FLAPS RETRACTED SLOWLY BUT CAME UP JUST FINE. ON DSCNT INTO ZZZ1 WE REBRIEFED THE NO FLAPS PROC JUST AS A PRECAUTION AND BRIEFED THE FACT THAT THE FLAPS SHOULD BE SELECTED EARLY SINCE THEY WERE OPERATING SLOW. FLAPS WENT INTO THE 9 DEG POSITION SLOWLY BUT INDICATING 9 DEG WHEN SELECTED ON INITIAL APCH INTO ZZZ1. WHEN TURNING FINAL JUST OUTSIDE THE MARKER FOR RWY 22L IN ZZZ1 THE FLAPS WERE SELECTED TO 22. WE DID NOT GET A FLAPS FAIL INDICATION ON EICAS BUT WE DID GET A 'SPS ADVANCED' MSG AND THE FLAP POSITION BOX ON EICAS TURNED AMBER WITH AN AMBER DASH. THERE WAS NOT ENOUGH TIME TO VISUALLY CHECK THE WING INDICATOR BUT THE RMU FLAP INDICATOR PAGE SHOWED NO POSITION INDICATION JUST AMBER DASH. WEATHER WAS VFR. WE WERE LINED UP ON FINAL JUST OUTSIDE MARKER SO I DECIDED TO DECLARE A NO FLAP EMER AS A PRECAUTION AND TO CONTINUE TO LAND. WE HAD ALREADY REVIEWED THE AOM VOL 1 PROC TWICE AND KNEW THE LNDG DISTANCE AND REF SPDS SO I QUICKLY BRIEFED THE FA ON SHORT FINAL AND SAID WE DID NOT ANTICIPATE A PROB BUT I WANTED TO KEEP HIM INFORMED. EMER WAS DECLARED WITH THE TWR AT ABOUT THE MARKER I CONSIDERED GOING AROUND BUT DID NOT WANT TO GAR WITH AN INTERMEDIATE FLAP POSITION IN A VERY BUMPY AIR. LNDG WAS UNEVENTFUL. PAX WERE NOT AWARE OF EMER. THERE WAS FLAP FAILURE. FLAP FAILURE UNEVENTFUL. I FIGURED IT WOULD HAVE BEEN SOMEWHERE BETWEEN THE 9 AND 22 POSITION AND USED THE APPROPRIATE CRITERIA FROM THE AOM VOL 1 PROC THAT WE HAD PREVIOUSLY BRIEFED. THE TOUCHDOWN WAS SOMEWHERE AROUND 170 KIAS AND THE LNDG WAS SMOOTH AND UNEVENTFUL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE MAINT ACTION TAKEN IS UNKNOWN AS MAINT DOES NOT RPT THE CORRECTIVE ACTION TO THE FLT CREWS. THE RPTR SAID THE ONLY WARNING WE HAD WAS THE EICAS MESSAGE 'LOW FLAP SPD' AND THAT DUE TO DEFERRING ONE FLAP CHANNEL PRIOR TO DEP. THE RPTR STATED THE EMBRAER 135,140 AND THE 145 ALL HAVE TROUBLES WITH THE TRAILING EDGE FLAPS CTL AND INDICATION. THE RPTR SAID THE COMPANY IS WORKING ON THE PROB BUT HAS HAD NO SUCCESS. THE RPTR STATED THE AIRPLANES HAVE A FLAP MAINT HISTORY.

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.