Flight crew taxied aircraft so that right main gear left the taxiway and passed through mud.

Attributes
ACN	172645
Time
Date	199103
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 9000 flight time type : 2500
ASRS Report	172645
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	non adherence : published procedure non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After 4 runway changes below 10000', due to wind shifts and inoperative VASI, normal landing was made. ATC advised on rollout, 'turn out at taxiway M, parallel to ramp.' right turn on M and another right turn on parallel was made. Crew discovered turn on M should have been left turn, as aircraft was on south side of runway not on north side where terminal was. Airport plate 11-1A showed 90 degree turn on taxiway J would cross runway and lead to ramp. In the turn from parallel to J, right main gear left the taxiway. Normal turn was completed and aircraft taxied to gate area. Right main had mud on it, but inspection by mechanics found no damage. Crew discovered that taxi on south parallel and taxiway J were not authority/authorized by company. The company airport diagram had this area marked out. As the company has been in the process of eliminating the company airport diagrams, the crew used the commercial plate and missed the note about the unauthorized area.

Original NASA ASRS Text

Title: FLT CREW TAXIED ACFT SO THAT RIGHT MAIN GEAR LEFT THE TXWY AND PASSED THROUGH MUD.

Narrative: AFTER 4 RWY CHANGES BELOW 10000', DUE TO WIND SHIFTS AND INOP VASI, NORMAL LNDG WAS MADE. ATC ADVISED ON ROLLOUT, 'TURN OUT AT TXWY M, PARALLEL TO RAMP.' RIGHT TURN ON M AND ANOTHER RIGHT TURN ON PARALLEL WAS MADE. CREW DISCOVERED TURN ON M SHOULD HAVE BEEN LEFT TURN, AS ACFT WAS ON S SIDE OF RWY NOT ON N SIDE WHERE TERMINAL WAS. ARPT PLATE 11-1A SHOWED 90 DEG TURN ON TXWY J WOULD CROSS RWY AND LEAD TO RAMP. IN THE TURN FROM PARALLEL TO J, RIGHT MAIN GEAR LEFT THE TXWY. NORMAL TURN WAS COMPLETED AND ACFT TAXIED TO GATE AREA. RIGHT MAIN HAD MUD ON IT, BUT INSPECTION BY MECHS FOUND NO DAMAGE. CREW DISCOVERED THAT TAXI ON S PARALLEL AND TXWY J WERE NOT AUTH BY COMPANY. THE COMPANY ARPT DIAGRAM HAD THIS AREA MARKED OUT. AS THE COMPANY HAS BEEN IN THE PROCESS OF ELIMINATING THE COMPANY ARPT DIAGRAMS, THE CREW USED THE COMMERCIAL PLATE AND MISSED THE NOTE ABOUT THE UNAUTH AREA.

Data retrieved from NASA's ASRS site as of July 2007 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.