A B727-200 RETURNED TO THE GATE FOR A CTL CHK AFTER DEICING WHERE IT WAS DISCOVERED THE DEICING WAS INCOMPLETE AND INCORRECTLY ACCOMPLISHED.

Narrative

THE NIGHT OF DEC/XA/00; ZZZ EXPERIENCED FREEZING PRECIP THAT REQUIRED ACFT TO BE DEICED ON THE MORNING OF DEC/XB/00. SNOW FALLING THAT MORNING NECESSITATED ANTI-ICING AFTER THE DEICING. ACFT DEICING AND ANTI-ICING WAS NOT DONE AT THE GATE; THEREFORE; NO FLT CTL CHKS WERE PERFORMED ON B727 XYZ DURING THE ORIGINATION PREFLT SINCE THERE WAS ICE OBSTRUCTING THE CTLS. DEICING/ANTI-ICING TOOK PLACE AFTER PUSHBACK AT ZZZ AT XA39. AFTER DEICING/ANTI-ICING HAD TAKEN PLACE AND WE WERE ADVISED THAT OUR HOLDOVER TIME HAD STARTED 11 MINS AGO; WE STARTED ALL 3 ENGS. BEFORE WE TAXIED FROM THE RAMP AREA; WE BEGAN TO PERFORM A COMPLETE FLT CTL CHK. THE R ELEVATOR INDICATOR WOULD NOT SHOW FULL AFT MOVEMENT AND IT DID NOT MATCH THE L ELEVATOR INDICATOR. CONTRACT MAINT WAS CALLED. CONTRACT MAINT AT ZZZ IS ACR. THE ACR MAINT MAN CAME OVER IN AN ACR DEICING TRUCK SO HE COULD USE THE LIFT TO INSPECT THE HORIZ STABILIZER. AFTER A CURSORY INSPECTION OF OUR JET; HE CAME INTO THE COCKPIT AND ADVISED US THAT WE STILL HAD OVER 1/4 INCH OF ICE ON THE UPPER AND LOWER SURFACE OF OUR WINGS. THERE WAS ANTI-ICING FLUID; BUT IT WAS COVERING ICE. HE ASKED US TO SHUT DOWN SO HE COULD INSPECT THE TAIL. OUR FE WENT OUT WITH THE MECH TO FURTHER ACCESS THE ICE. HE CONFIRMED THAT ICE WAS STILL ON THE ACFT; ESPECIALLY IN THE RECESSED AREAS AROUND FLT CTLS. THE MECH INSPECTED THE HORIZ STABILIZER AND FOUND ICE ON THE STABILIZER; ESPECIALLY IN THE JACK SCREW AREA. WE WERE BLOCKING THE RAMP AND HAD PAX WHO WANTED TO GET OFF; SO WE WENT BACK TO THE GATE. AT THE GATE; THE ACR MECH THOROUGHLY DEICED THE ACFT. HE THEN GOT ON THE SVC INTERPHONE AND WE DID A COMPLETE FLT CTL CHK. THE R ELEVATOR WOULD STILL NOT INDICATE FULL MOVEMENT; BUT THE MECH WAS ABLE TO CONFIRM THAT WE INDEED HAD FULL MOVEMENT -- THE ELEVATORS MATCHED -- AND THERE WAS NO DAMAGE TO THE HORIZ STABILIZER OR ELEVATORS. AFTER CONSULTING THE MEL; WE CALLED DISPATCH WHO CONFERENCED IN MAINT TECHNICIAN. WE AGREED THAT WE HAD A BAD ELEVATOR POS INDICATOR AND PLACARDED THE R ELEVATOR POS INDICATOR INOP IN ACCORDANCE WITH MEL 27-7. THIS ALSO TOOK THE ACFT OUT OF CAT II WHICH WAS NOT A FACTOR IN THE DISPATCHING OF THIS FLT.