Narrative:

We were parked in the block of 19 waiting for the weight and balance and we noticed a moderate vibration from an unspecific location lasting approximately 10 seconds. The initial vibration was followed by a second; shorter; lower intensity vibration a short time later. I noticed a slight variation in the #1 engine indications of about 0.3% N1 and 100 pounds per hour fuel flow during the first vibration; but not during the second. The lead flight attendant called us and inquired about the vibration and said that they thought it emanated from beneath the center of the cabin. I ran the engines up to approximately 40% N1 and all indications were normal with no vibrations. First officer and I eliminated external causes as the possibility for the vibration. I then called the tech center for advice and we all decided that we should go back to the gate for further inspection. Shortly after advancing the thrust levers to taxi to a gate; the vibration started up again. First officer reported that the egt was rising higher in engine #1 than engine #2. The egt was approaching 600 degrees C and we just started discussing shutting down the engine when the engine failed. Very shortly after that we arrived at the gate. We subsequently found out that the N2 was frozen.

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Original NASA ASRS Text

Title: A319 ENG FAILED DURING TAXI OUT.

Narrative: WE WERE PARKED IN THE BLOCK OF 19 WAITING FOR THE WT AND BAL AND WE NOTICED A MODERATE VIBRATION FROM AN UNSPECIFIC LOCATION LASTING APPROX 10 SECONDS. THE INITIAL VIBRATION WAS FOLLOWED BY A SECOND; SHORTER; LOWER INTENSITY VIBRATION A SHORT TIME LATER. I NOTICED A SLIGHT VARIATION IN THE #1 ENG INDICATIONS OF ABOUT 0.3% N1 AND 100 LBS PER HR FUEL FLOW DURING THE FIRST VIBRATION; BUT NOT DURING THE SECOND. THE LEAD FLT ATTENDANT CALLED US AND INQUIRED ABOUT THE VIBRATION AND SAID THAT THEY THOUGHT IT EMANATED FROM BENEATH THE CTR OF THE CABIN. I RAN THE ENGS UP TO APPROX 40% N1 AND ALL INDICATIONS WERE NORMAL WITH NO VIBRATIONS. FO AND I ELIMINATED EXTERNAL CAUSES AS THE POSSIBILITY FOR THE VIBRATION. I THEN CALLED THE TECH CTR FOR ADVICE AND WE ALL DECIDED THAT WE SHOULD GO BACK TO THE GATE FOR FURTHER INSPECTION. SHORTLY AFTER ADVANCING THE THRUST LEVERS TO TAXI TO A GATE; THE VIBRATION STARTED UP AGAIN. FO RPTED THAT THE EGT WAS RISING HIGHER IN ENG #1 THAN ENG #2. THE EGT WAS APCHING 600 DEGS C AND WE JUST STARTED DISCUSSING SHUTTING DOWN THE ENG WHEN THE ENG FAILED. VERY SHORTLY AFTER THAT WE ARRIVED AT THE GATE. WE SUBSEQUENTLY FOUND OUT THAT THE N2 WAS FROZEN.

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.