Taxiway markings at sql reported to be wearing and becoming less obvious. A taxiway excursion is the...

Attributes
ACN	491313
Time
Date	200011
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sql.airport
State Reference	CA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	None
Person 1
Affiliation	other
Function	instruction : instructor oversight : pic
Qualification	pilot : cfi
Experience	flight time last 90 days : 30 flight time total : 1400 flight time type : 195
ASRS Report	491313
Person 2
Affiliation	other
Function	instruction : trainee
Qualification	pilot : student
Events
Anomaly	excursion : taxiway other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Airport Flight Crew Human Performance
Primary Problem	Airport
Situations
Airport	markings : sql.airport

Narrative:

Aircraft on taxi to runway 12 sql, inadvertently taxied beyond no movement area protecting ramp low drainage area, west side of runway 12. No disruption to airport operations or problem for aircraft on taxi, taxi line clearly indicated right turn around area, however, an error in decision to taxi direct to run-up area, aircraft taxi continue through area to run-up without incident. Protected area is not as obvious as might be, could use new paint on taxiway, but movement was an error in decision because of perception of the logical direct route to run-up area. Callback conversation with reporter revealed the following information: the reporter said that the large open ramp area has two taxi lines painted. One for traffic from each direction. The one they were following had two 90 degree turns to avoid a low area of the ramp that is used for drainage. The visual picture is that the best route to the run-up area is straight ahead. The deterioration of the painted lines and admitted inattention to them resulted in taxiing through the drainage area.

Original NASA ASRS Text

Title: TXWY MARKINGS AT SQL RPTED TO BE WEARING AND BECOMING LESS OBVIOUS. A TXWY EXCURSION IS THE RESULT.

Narrative: ACFT ON TAXI TO RWY 12 SQL, INADVERTENTLY TAXIED BEYOND NO MOVEMENT AREA PROTECTING RAMP LOW DRAINAGE AREA, W SIDE OF RWY 12. NO DISRUPTION TO ARPT OPS OR PROB FOR ACFT ON TAXI, TAXI LINE CLEARLY INDICATED R TURN AROUND AREA, HOWEVER, AN ERROR IN DECISION TO TAXI DIRECT TO RUN-UP AREA, ACFT TAXI CONTINUE THROUGH AREA TO RUN-UP WITHOUT INCIDENT. PROTECTED AREA IS NOT AS OBVIOUS AS MIGHT BE, COULD USE NEW PAINT ON TXWY, BUT MOVEMENT WAS AN ERROR IN DECISION BECAUSE OF PERCEPTION OF THE LOGICAL DIRECT RTE TO RUN-UP AREA. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR SAID THAT THE LARGE OPEN RAMP AREA HAS TWO TAXI LINES PAINTED. ONE FOR TRAFFIC FROM EACH DIRECTION. THE ONE THEY WERE FOLLOWING HAD TWO 90 DEG TURNS TO AVOID A LOW AREA OF THE RAMP THAT IS USED FOR DRAINAGE. THE VISUAL PICTURE IS THAT THE BEST RTE TO THE RUN-UP AREA IS STRAIGHT AHEAD. THE DETERIORATION OF THE PAINTED LINES AND ADMITTED INATTENTION TO THEM RESULTED IN TAXIING THROUGH THE DRAINAGE 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.

Taxiway markings at sql reported to be wearing and becoming less obvious. A taxiway excursion is the result.