BIRD STRIKE; INST PROB; FMS MALFUNCTION CAUSE ALT OVERSHOOT.

Narrative

AFTER TKOF; 100 FT AGL; A BIRD IMPACTED THE L SIDE OF THE FUSELAGE. AFTER CONFIRMING NO ENG DAMAGE THE FO INITIATED A STANDARD NOISE ABATEMENT CLBOUT. PASSING 3000 FT; WE STILL HAD NO CONTACT WITH DEP CTL. WHILE THE CAPT WAS CORRECTING THIS; THE FO STATED OUR #1 AND #2 NEEDLES WERE SPLIT 30 DEGS DESPITE BEING ON THE SAME FREQ. WHILE SUSPECTING ELECTROMAGNETIC INTERFERENCE THE FO STATED HE'D MAINTAIN HIS PRESENT HDG AND TURN OVER THE LOM WHEN HE RECEIVED PROPER VISUAL AND AURAL IDENT. THE FO THEN CALLED FOR THRUST MGMNT/AUTO THROTTLES. WHILE SWITCHING TO DEP CTL THE CAPT SELECTED PERFORMANCE MGMNT ON THE FMS. THE FMS DISPLAYED THE HOLDING PAGE; FLAPS 4 DEGS; AND THE THROTTLES NOW MOVED TO IDLE. THE NAV AND PWR PROBS WERE DISCOVERED IMMEDIATELY AND REMEDIED ASAP. SHORTLY AFTER THE ABOVE ITEMS TOOK PLACE; THE DEP CTLR INQUIRED ABOUT OUR ALT. WE HAD INADVERTENTLY CLBED APPROX 250 FT ABOVE OUR ASSIGNED ALT OF 5000 FT. THE FO HAD ALREADY DECLARED THIS AND WAS CORRECTING BACK. A VECTOR ON COURSE WAS GIVEN; OUR NAVAIDS AND FMS PROBS CLRED UP AND THE REMAINDER OF FLT WAS UNEVENTFUL. THE EVENTS ABOVE HAPPENED IN A VERY SHORT TIME SPAN DURING A HIGH WORKLOAD PERIOD. ALL ABNORMALITIES AND DEVS WERE DISCOVERED INSTANTLY AND HANDLED IN A QUICK/PROFESSIONAL MANNER. THE BIRD STRIKE AND FMS PROBS WERE NOTED IN THE MAINT LOGBOOK AND I SUSPECT ELECTRONIC INTERFERENCE DID OCCUR FROM EITHER AN ONBOARD UNAUTHORIZED XMITTER RECEIVER OR EXTERNAL JAMMING. SUPPLEMENTAL INFORMATION FROM ACN 243663: THE MAX ALT ATTAINED PRIOR TO LEVELING OFF AT 5000 FT WAS 5250-5300 FT. FFA DEPS ARE COMPLICATED ENOUGH WITH NO DISTRS. SUPPLEMENTAL INFORMATION FROM ACN 243437: THE EDDF DEPS ARE COMPLICATED ENOUGH WITHOUT INCLUDING A BIRD STRIKE; MALFUNCTIONING ADF; COMS PROBS; MALFUNCTIONS FMS PERFORMANCE MGMNT. COCKPIT WORKLOAD BECAME VERY HIGH! CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: THERE WAS NO RELATIONSHIP BTWN THE BIRD STRIKE AND ANY OF THE FOLLOWING ACFT MALFUNCTIONS. THE ELECTRO- MAGNETIC INTERFERENCE SUSPECTED BY SOME OF THE CREW WAS DUE TO THE ADF NEEDLES SPLITTING AND NOTHING ELSE. THE FMS GLITCHES WERE NOT THOUGHT TO BE CAUSED BY CREW ERROR AS THE PROB RECURRED ON A LATER ATTEMPT. THE FMS THOUGHT IT WAS TO PROVIDE PWR FOR HOLDING WITH 4 DEG FLAPS AND REDUCED PWR ACCORDINGLY.