Narrative:

Our clearance was to 'turn left to 100 degrees; maintain 2000 ft as filed; maintain 2000 ft; FL290 in 10 mins; departure frequency 124.3; squawk XXXX.' upon departure xfer; we lost all communication; the altimeters went left side to FL340; right side to 0; the autoplt (which was engaged) became disengaged and the airplane did an abrupt pitch up to 2900 ft. Using the third altimeter; I took the airplane back down to 2000 ft. In the meantime; we heard ATC telling us to turn right heading 180 degrees to intercept the 166 degree radial off maverick VOR. We still could not answer ATC but were following their commands. We regained limited communication on captain's side; first officer's side remained inoperative for the rest of the flight. This is my recollection; as I remember. Callback conversation with reporter revealed the following information: the reporter indicated he had not encountered this anomaly before. This was a citation ii with older analog instruments (round gauges). It has a flight director on the left side and had been rvsm converted (individual air data computer's and digital altimeters installed). The primary attitude instruments were not lost; only the digital altimeters. The standby altimeter was used to regain assigned altitude. Appears that the bus supplying power to the air data computer's; primary altimeters; and primary communication was momentarily lost and responsible for the anomaly.

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Original NASA ASRS Text

Title: CITATION II HAS AN ELECTRICAL PWR SURGE DURING DEP. ALTIMETERS; AUTOPLT AND PRIMARY COM RADIOS ARE LOST. ACFT PITCHES UP AND FLT CREW REGAINS ACFT CTL USING STANDBY INSTS. NORMAL ELECTRICAL PWR RETURNS; ALL EQUIP IS REGAINED; AND FLT CONTINUES TO DEST. WX NOT A FACTOR.

Narrative: OUR CLRNC WAS TO 'TURN L TO 100 DEGS; MAINTAIN 2000 FT AS FILED; MAINTAIN 2000 FT; FL290 IN 10 MINS; DEP FREQ 124.3; SQUAWK XXXX.' UPON DEP XFER; WE LOST ALL COM; THE ALTIMETERS WENT L SIDE TO FL340; R SIDE TO 0; THE AUTOPLT (WHICH WAS ENGAGED) BECAME DISENGAGED AND THE AIRPLANE DID AN ABRUPT PITCH UP TO 2900 FT. USING THE THIRD ALTIMETER; I TOOK THE AIRPLANE BACK DOWN TO 2000 FT. IN THE MEANTIME; WE HEARD ATC TELLING US TO TURN R HDG 180 DEGS TO INTERCEPT THE 166 DEG RADIAL OFF MAVERICK VOR. WE STILL COULD NOT ANSWER ATC BUT WERE FOLLOWING THEIR COMMANDS. WE REGAINED LIMITED COM ON CAPT'S SIDE; FO'S SIDE REMAINED INOP FOR THE REST OF THE FLT. THIS IS MY RECOLLECTION; AS I REMEMBER. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR INDICATED HE HAD NOT ENCOUNTERED THIS ANOMALY BEFORE. THIS WAS A CITATION II WITH OLDER ANALOG INSTRUMENTS (ROUND GAUGES). IT HAS A FLT DIRECTOR ON THE L SIDE AND HAD BEEN RVSM CONVERTED (INDIVIDUAL ADC'S AND DIGITAL ALTIMETERS INSTALLED). THE PRIMARY ATTITUDE INSTRUMENTS WERE NOT LOST; ONLY THE DIGITAL ALTIMETERS. THE STANDBY ALTIMETER WAS USED TO REGAIN ASSIGNED ALT. APPEARS THAT THE BUS SUPPLYING POWER TO THE ADC'S; PRIMARY ALTIMETERS; AND PRIMARY COM WAS MOMENTARILY LOST AND RESPONSIBLE FOR THE ANOMALY.

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.