FUEL DUMPED; RETURN LAND MANDATED BY ACFT EQUIP PROB. NO AIRSPD ON TKOF ROLL; CONTINUES TKOF.

Narrative

EARLY MORNING DEP; DARK RAMP; ALSO FLYING WITH A PART- TIME PLT (ALTHOUGH ONE WE USE FAIRLY REGULARLY). ACFT WAS ALREADY OUT WHEN I ARRIVED AND I WAS BUSY WITH WX; FLT PLANNING; PAX MEALS; ETC. I DID NOT FINISH MY WALKAROUND INSPECTION AS I WAS INTERRUPTED BY A PAX ARRIVING VERY EARLY. I TOOK CARE OF THE PAX AND NEVER RESUMED MY NORMAL ROUTINE. I HAD A COUPLE OF HINTS THAT SOMETHING WAS AMISS DURING TAXI BUT BLEW THEM OFF. ON THE TKOF ROLL THE FO CALL FOR '90 KTS' WASN'T FORTHCOMING AND I INSTEAD HEARD 'YOU'VE GOT NO AIRSPD.' IT TOOK A COUPLE OF SECONDS TO REALIZE I HADN'T HEARD 'AIRSPD ALIVE.' I THEN CALLED 'SAY YOUR AIRSPD' (#2 INDICATOR). CAME THE REPLY 'I'VE GOT NO AIRSPD EITHER.' BY THIS TIME WE HAD CONSIDERABLE SPD AND AT PRESENT WT AND WX CONDITIONS I ELECTED TO CONTINUE TKOF. ONCE AIRBORNE I SHOWED 'ADC FAILURE' LIGHT WITH ACCOMPANYING FLAGS ON INSTS. THE ODD THING WAS THAT #2 AIRSPD WASN'T WORKING EITHER; I COULDN'T FIGURE IT OUT; BUT DECIDED TO DUMP FUEL AND RETURN TO BASE. TWR ROLLED THE EMER EQUIP. (MUST BE AN AUTOMATIC THING FOR A RETURN TO BASE.) AFTER DUMPING FUEL AND TURNING INBOUND I REALIZED WHY WE HAD THE PROBS. THE ACFT HAD BEEN INSPECTED AND WASHED THE DAY BEFORE AND TAPE HAD BEEN LEFT ON THE STATIC PORTS AND PITOT TUBES. I HAD NOT SEEN THEM IN THE DARK AND MY PREFLT HAD BEEN INTERRUPTED. ABSOLUTELY NO EXCUSE! I HAVE RESOLVED TO ARRIVE IN TIME TO PREFLT IN A LIGHTED HANGAR AND INCREASE MY VIGILANCE. I NOW PHYSICALLY TOUCH EACH ITEM AND VERIFY CONDITION ON PREFLT. MAINT NOW USES LONG; RED TAPE STREAMERS TO COVER PITOT AND STATIC PORTS; JUST IN CASE. SOLUTIONS: ALWAYS; ALWAYS; ALWAYS DO A COMPLETE PREFLT WITH FLASHLIGHT IF NEED BE! WHEN INTERRUPTED OR OUT OF YOUR NORMAL ROUTINE; SLOW DOWN; START OVER AND VERIFY! PAY ATTN TO WARNING SIGNS: 1) FLAPS WERE DOWN ON ARR; REASON: ACFT HAD BEEN WASHED AND THEY ALWAYS COVER PITOT/STATIC PORTS. 2) ALTIMETER SLIGHTLY OFF FIELD ELEVATION -- (WHAT'S WRONG? COULD THE STATIC PORTS BE TAPED?) 3)AIRSPD NEEDLE NOT QUITE ON ZERO: (SEE #2). PARTING THOUGHT: COMPLACENCY KILLS! IT WAS CAVU THIS TIME; WHAT IF IT HAD BEEN 200 FT AND HALF A MI?!