A319 flight crew reported malfunctions of FCU systems shortly after rotation on takeoff.

Narrative:

We started out with a FCU fault at pushback so we called maintenance control who had us reset the FCU1 and FCU2 circuit breakers and this did not solve the problem so FCU2 was put on MEL list. After receiving new release; we continued. After rotation; we lost flight directors; fmas; and altitude and airspeed presets. The ECAM indicated autopilot off and auto thrust off. Everything that went off started cycling on then off then we started receiving constant altitude warnings since we could not set the new altitudes; which was very distracting. We could not clear the autopilot/autothrottles off to see what the malfunction was because it kept cycling on then off. So we were a little confused as to what was wrong or which QRH to run. Since I was flying; I continued to fly until we could level off which we never did since we were in busy airspace. We identified as an emergency and asked for vectors back. Since ATC did such a great job of doing what we asked for we found ourselves on final before we were ready for the approach. We asked to be vectored off and delay vectors to finish getting set up. I gave the fist officer control when level and going straight; changed the destination; and got the box in the correct phase of flight; talked to flight attendants tried to get a message out to dispatch and finished our checklists then told ATC we were ready and had an uneventful approach and landing.

Original NASA ASRS Text

Title: A319 flight crew reported malfunctions of FCU systems shortly after rotation on takeoff.

Narrative: We started out with a FCU fault at pushback so we called Maintenance Control who had us reset the FCU1 and FCU2 circuit breakers and this did not solve the problem so FCU2 was put on MEL list. After receiving new release; we continued. After rotation; we lost flight directors; FMAs; and altitude and airspeed presets. The ECAM indicated autopilot off and auto thrust off. Everything that went off started cycling on then off then we started receiving constant altitude warnings since we could not set the new altitudes; which was very distracting. We could not clear the autopilot/autothrottles off to see what the malfunction was because it kept cycling on then off. So we were a little confused as to what was wrong or which QRH to run. Since I was flying; I continued to fly until we could level off which we never did since we were in busy airspace. We identified as an Emergency and asked for vectors back. Since ATC did such a great job of doing what we asked for we found ourselves on final before we were ready for the approach. We asked to be vectored off and delay vectors to finish getting set up. I gave the Fist Officer control when level and going straight; changed the destination; and got the box in the correct phase of flight; talked to flight attendants tried to get a message out to dispatch and finished our checklists then told ATC we were ready and had an uneventful approach and landing.

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	1533326
Time
Date	201804
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	FCU (Flight Control Unit)
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 100
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe