LEAR 55 FLC DIVERTS TO TEB; NJ; AFTER EXPERIENCING SOME FLT CTL PROBS THAT WERE DESCRIBED AS 'MUSHY AND ABNORMAL.' WX WAS IMC. THE FOLLOWING DAY THE TEB FSDO OFFICE CALLED AND ASKED THE FO RHETORICAL AND INSINUATING QUESTIONS.

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AFTER LEVELOFF AT INITIAL ALT; CTLS FELT MUSHY AND ABNORMAL. A YAW MOTION OCCURRED EVERY 30 SECONDS OR SO. EMER/ABNORMAL CHKLISTS WERE COMPLETED. CTL OF ACFT WAS XFERRED TO CAPT SO HE COULD DETERMINE CONDITION. AN EMER WAS DECLARED IN ORDER TO RECEIVE PRIORITY HANDLING TO TEB. POS WAS ABOUT 20 MI S OF TEB. LNDG CONFIGN WAS DECIDED TO BE 20 DEGS FLAPS AND REF SPD WAS INCREASED 10- 20 KTS. A NORMAL LNDG WAS MADE AT TEB. POSTFLT INSPECTION OF THE ACFT DID NOT REVEAL ANY ICE OR ABNORMAL FLT CTL CONDITIONS. THE FOLLOWING DAY; I WAS CONTACTED BY MR X OF THE FAA OFFICE AT TEB. HE HANDED ME OVER TO MR Y OF THE TEB OFFICE OF FAA. HE ASKED ME GENERAL QUESTIONS ABOUT THE OVERALL CTL OF THE ACFT; AND WX AND FLT CONDITIONS. HE THEN PROCEEDED TO ASK VERY SARCASTIC; PATRONIZING AND RHETORICAL QUESTIONS SUCH AS: 'WHERE SHOULD YOU LAND IF YOU HAVE A PROB? HOW LONG IS RWY 6 AT TEB AND HOW LONG IS RWY 1/19?' HIS QUESTIONS MADE ME FEEL VERY UNCOMFORTABLE AND AS IF I WERE DEFENDING MYSELF AND THE ACTIONS WE TOOK. IN RETROSPECT; I WOULD THINK TWICE ABOUT DECLARING AN EMER. I NOW UNDERSTAND WHY PLTS ARE VERY HESITANT TO DECLARE EMERS BECAUSE IT OPENS THE DOOR FOR THE FAA TO MAKE AN INVESTIGATION. IN THE FUTURE I WILL DECLARE AN EMER ONLY IF IT IS A LIFE OR DEATH SIT. I GUESS THAT'S WHY ACFT ARE FLOWN INTO THE GND AND CRASH WHEN THE CTLRS OR OTHERS COULD HAVE OFFERED HELP. WHAT A BAD AND UNHEALTHY SIT.