A319 captain described an engine vibration that suddenly ceased; but included split engine parameter...

Narrative:

On takeoff roll; n-1 on engine 2 vibration high; other parameters normal; no ECAM. Climb out n-1 vibration subsided. Climbing from FL360 to FL380 entire aircraft shuttered/vibrated then kabam. Everything nice. Engine 2 n1 vibration back to normal; but engine 2 fuel flow about 1;000 pound per hour (pph) over engine 1. Also; egt engine 2 exceeded engine 1 by about 150 degrees. I conferred with dispatch/maintenance on a phone patch and decided to return to [departure airport]. I advised lead flight attendant and then spoke to passengers. Return to [departure airport] uneventful. No ECAM presented itself. Preliminary inspection by mechanic that met us at gate indicated last turbine section of #2 engine was no longer there.

Original NASA ASRS Text

Title: A319 Captain described an engine vibration that suddenly ceased; but included split engine parameters. Following a successful return to the field; Maintenance identified the loss of turbine blades.

Narrative: On takeoff roll; n-1 on engine 2 vibration high; other parameters normal; no ECAM. Climb out n-1 vibration subsided. Climbing from FL360 to FL380 entire aircraft shuttered/vibrated then kabam. Everything nice. Engine 2 n1 vibration back to normal; but engine 2 fuel flow about 1;000 Pound Per Hour (PPH) over engine 1. Also; EGT engine 2 exceeded engine 1 by about 150 degrees. I conferred with dispatch/maintenance on a phone patch and decided to return to [departure airport]. I advised lead FA and then spoke to passengers. Return to [departure airport] uneventful. No ECAM presented itself. Preliminary inspection by mechanic that met us at gate indicated last turbine section of #2 engine was no longer there.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1296953
Time
Date	201509
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Turbine Engine
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

A319 captain described an engine vibration that suddenly ceased; but included split engine parameters. Following a successful return to the field; maintenance identified the loss of turbine blades.