Captain reports false raas 'on taxi way' call during takeoff on runway 29 at ktn.

Attributes
ACN	809569
Time
Date	200810
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tower : zzz.tower
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 25 flight time type : 15000
ASRS Report	809569
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On takeoff from ktn we chose to use runway 29. We taxied out to the runway and then back taxied onto the new far east portion of the runway for a full length takeoff. On initial takeoff roll the raas system announced 'on taxiway' twice while the airplane was accelerating. I announced that we were on the runway and we continued the takeoff without confusion or incident. This report is to merely document the raas database inaccuracy. Update the ktn runway raas database. Raas gave incorrect 'on taxiway' warning on takeoff roll.

Original NASA ASRS Text

Title: CAPTAIN REPORTS FALSE RAAS 'ON TAXI WAY' CALL DURING TAKEOFF ON RUNWAY 29 AT KTN.

Narrative: ON TKOF FROM KTN WE CHOSE TO USE RWY 29. WE TAXIED OUT TO THE RWY AND THEN BACK TAXIED ONTO THE NEW FAR E PORTION OF THE RWY FOR A FULL LENGTH TKOF. ON INITIAL TKOF ROLL THE RAAS SYS ANNOUNCED 'ON TXWY' TWICE WHILE THE AIRPLANE WAS ACCELERATING. I ANNOUNCED THAT WE WERE ON THE RWY AND WE CONTINUED THE TKOF WITHOUT CONFUSION OR INCIDENT. THIS RPT IS TO MERELY DOCUMENT THE RAAS DATABASE INACCURACY. UPDATE THE KTN RWY RAAS DATABASE. RAAS GAVE INCORRECT 'ON TXWY' WARNING ON TKOF ROLL.

Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.