Narrative:

Almost immediately after establishing positive climb and upon gear retraction we lost flight guidance; including both flight directors; both altitude pre-selector displays; flight director panel mode inputs; and autopilot. We had a series of red boxes appear on both pfd's with the symbols 'FD'. We lost flight guidance information as we entered IMC conditions. Our immediate concern was to maintain positive control of the airplane so the captain (flying pilot) maintained pitch and bank; cross referencing the standby attitude indicator. The captain was the flying pilot. As the pilot monitoring I immediately started troubleshooting and trying to rectify the problem by selecting different flight director modes; without success. I then tried different screen configurations and asked the captain what altitude I should reset on the altitude pre-selector. He said; '4000.' I then noticed that we had just crossed 4000' MSL and advised him to level off immediately. I spun the altitude selector to 4000 and again attempted to re-engage the flight director guidance system. The captain started a level off. The captain didn't want to push the nose down too aggressively for fear of exerting negative G's on the airframe and the passengers; even though they were belted. Our primary concern was to maintain control of the airplane and maintain passenger safety. By the time the captain had leveled off the flight director had reappeared on both pilot and co-pilot pfd's and was now responding to my mode inputs. It was at that time that we noticed we had leveled off at about 8000' MSL. The whole sequence from loss of flight guidance and entering IMC conditions to level off appeared to be less than 2 minutes. When asked by ATC we advised them we had a flight director or flight display malfunction but that everything appeared to be working normally again. I asked if we should descend to the clearance altitude but was told to maintain present altitude and to contact center. No further anomalies were encountered for the remainder of the trip until immediately before touchdown at ZZZ; when we got an aural warning; 'landing gear; landing gear' in spite of the fact that we had gear down and locked with 3 gear safe annunciators. Other items of note are the following: accelerating for takeoff just before reaching V1 we hit a bump which felt like hitting a speed bump. It was so severe that it caused the nose wheel to lift off the runway. Since the captain maintained control and we were almost at V1 the captain elected to continue the takeoff. Now we're wondering if the shock of the bump may have caused the flight director computer and altitude pre-selector system to go 'offline' for a few minutes and then reset itself. Since taking delivery of the airplane 7 months ago we have encountered several intermittent electrical 'glitches' or anomalies that correct themselves or seem to go through some sort of soft reset. For example; sometimes the autopilot will disengage for no apparent reason. Once re-engaged it will trip back off after a short time. After re-engaging it a second time if functions normally for the remainder of the trip. We have twice had the co-pilot pfd display go black for about a second; then come back on and work normally for the rest of the flight. The co-pilot's audiopanel fails intermittently on initial power up. Recycling the avionics master switch clears the problem. On a flight several months ago we also got a 'landing gear; landing gear ' aural warning in the flare; just before touchdown. Since this was our first electronic glitch it was reported to cessna and investigated by their maintenance team. We lost the right gcu twice. Both times the unit had to be replaced by maintenance. We are now wondering if the loss of the flight guidance is yet one more 'glitch.'

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Original NASA ASRS Text

Title: A CE525B lost all autoflight guidance immediately after takeoff. The Flight Directors; Altitude Alert/Capture; Flight Director Panel and Autopilot returned to normal functioning after about 2 minutes.

Narrative: Almost immediately after establishing positive climb and upon gear retraction we lost flight guidance; including both flight directors; both altitude pre-selector displays; flight director panel mode inputs; and autopilot. We had a series of red boxes appear on both PFD's with the symbols 'FD'. We lost flight guidance information as we entered IMC conditions. Our immediate concern was to maintain positive control of the airplane so the Captain (Flying Pilot) maintained pitch and bank; cross referencing the standby attitude indicator. The Captain was the flying pilot. As the pilot monitoring I immediately started troubleshooting and trying to rectify the problem by selecting different flight director modes; without success. I then tried different screen configurations and asked the Captain what altitude I should reset on the altitude pre-selector. He said; '4000.' I then noticed that we had just crossed 4000' MSL and advised him to level off immediately. I spun the altitude selector to 4000 and again attempted to re-engage the flight director guidance system. The Captain started a level off. The Captain didn't want to push the nose down too aggressively for fear of exerting negative G's on the airframe and the passengers; even though they were belted. Our primary concern was to maintain control of the airplane and maintain passenger safety. By the time the Captain had leveled off the flight director had reappeared on both pilot and co-pilot PFD's and was now responding to my mode inputs. It was at that time that we noticed we had leveled off at about 8000' MSL. The whole sequence from loss of flight guidance and entering IMC conditions to level off appeared to be less than 2 minutes. When asked by ATC we advised them we had a flight director or flight display malfunction but that everything appeared to be working normally again. I asked if we should descend to the clearance altitude but was told to maintain present altitude and to contact Center. No further anomalies were encountered for the remainder of the trip until immediately before touchdown at ZZZ; when we got an aural warning; 'Landing gear; landing gear' in spite of the fact that we had gear down and locked with 3 gear safe annunciators. Other items of note are the following: Accelerating for takeoff just before reaching V1 we hit a bump which felt like hitting a speed bump. It was so severe that it caused the nose wheel to lift off the runway. Since the Captain maintained control and we were almost at V1 the Captain elected to continue the takeoff. Now we're wondering if the shock of the bump may have caused the flight director computer and altitude pre-selector system to go 'offline' for a few minutes and then reset itself. Since taking delivery of the airplane 7 months ago we have encountered several intermittent electrical 'glitches' or anomalies that correct themselves or seem to go through some sort of soft reset. For example; sometimes the autopilot will disengage for no apparent reason. Once re-engaged it will trip back off after a short time. After re-engaging it a second time if functions normally for the remainder of the trip. We have twice had the co-pilot PFD display go black for about a second; then come back on and work normally for the rest of the flight. The co-pilot's audiopanel fails intermittently on initial power up. Recycling the avionics master switch clears the problem. On a flight several months ago we also got a 'Landing Gear; Landing Gear ' aural warning in the flare; just before touchdown. Since this was our first electronic glitch it was reported to Cessna and investigated by their maintenance team. We lost the right GCU twice. Both times the unit had to be replaced by maintenance. We are now wondering if the loss of the flight guidance is yet one more 'glitch.'

Data retrieved from NASA's ASRS site as of April 2012 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.