CPR PLT OF SMA SINGLE ENG LAND ACFT EXPERIENCED INTERMITTENT ENG PWR LOSS SHORTLY AFTER TKOF AND RETURNED TO THE ARPT AN ONCE CAUSING ATC TO MOVE SEVERAL ACFT OUT OF ITS WAY.

Narrative

DEPARTED PHX RWY 8R ON IFR CLRNC TO P06 (BULLHEAD; AZ) WITH L TURN ON VECTOR NBOUND AFTER PASSING 2300 FT. DURING CLB TO 2300 FT; ACFT EXPERIENCED PARTIAL PWR LOSS; THEN RETURNED TO NORMAL PWR. L TURN WAS COMMENCED AT 2300 FT; HANDED OFF TO PHX DEP SHORTLY THEREAFTER. APPROX 5 NM N OF PHX; ACFT AGAIN SUFFERED PWR FLUCTUATIONS. FURTHER FLT AT ANY ALT NBOUND WOULD HAVE ENTERED IMC. ATC ADVISED OF ENG PROBS AND REQUEST TO RETURN TO PHX. ATC REQUESTED CONTINUATION ON NBOUND VECTOR UNTIL RETURN WORKED OUT WITH TWR. WHEN ASKED; I DECLINED TO DECLARE AN EMER AT THIS TIME; BUT BEGAN IMMEDIATE L TURN BACK TO ARPT; WHILE STILL IN VMC. DEP HANDED OFF FOR IMMEDIATE CONTACT PHX TWR. CONTACTED TWR AND WAS CLRED TO DSND TO 2100 FT (TFC PATTERN ALT) AND ENTER DOWNWIND RWY 8L. TWR HAD MLG ACFT ON 8L; IN POS; WHICH VOLUNTEERED TO EXIT RWY AND TWR APPROVED. SECOND MLG ACFT WAS JUST ACROSS 8L HOLD LINE AND STOPPED. I OBSERVED DISTANT TFC ON FINAL 8L AND BEGAN BASE-LEG TURN. AT SAME TIME ADVISED TWR WOULD LIKE SHORT APCH. TWR ISSUED GAR TO TFC ON FINAL (CPR JET) AND CLRED ME TO LAND 8L WITH RESTRICTION NOT TO OVERLY MLG ACFT THAT WAS OVER HOLD LINE; WHICH WAS COMPLIED WITH. ON PARKING AT FBO; RECEIVED MESSAGE TO CALL TWR. WAS ADMONISHED FOR MAKING SHORT APCH AND NOT DECLARING AN EMER. CONCLUSIONS: SHOULD HAVE DECLARED IMMEDIATELY; AND REQUESTED SHORT APCH OR CIRCLING ON MIDFIELD DOWNWIND AT SAFE ALT EARLIER WITH TWR AS ENG WAS DEVELOPING ADEQUATE PWR AT TIME.