B737 crew fails to turn as directed by the prado 6 departure out of ont.

Attributes
ACN	726981
Time
Date	200702
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : rplc.airport
State Reference	FO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 150 flight time total : 6000 flight time type : 1000
ASRS Report	726981
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	incursion : runway non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Airport ATC Human Performance Flight Crew Human Performance Chart Or Publication
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Our flight was cleared to taxi to runway 2R via taxiway F. Neither the captain nor I had extensive experience flying from rplc. When cleared to taxi; there was no sign of taxiway F. We determined via our airport diagram its position. As we started to roll; we were cleared for takeoff on runway 2R. We crossed a very wide unmarked taxiway that we both mistook for runway 2L. When we approached runway 2L it was not labeled and we lined up for takeoff thinking we were on runway 2R. The only sign I saw was on the far side of the runway as we positioned that read runways 2R/20L. Because the runways (2L/2R) are staggered we did not see the right runway as we positioned (both runways are of equal length). When I looked at the map to check our alignment; it looked tight. At approximately 120 KTS; I heard the captain say 'I think we are on the wrong runway.' we rotated and climbed without further incident. The only transmission from tower was to contact departure passing 5000 ft.

Original NASA ASRS Text

Title: B737 CREW FAILS TO TURN AS DIRECTED BY THE PRADO 6 DEP OUT OF ONT.

Narrative: OUR FLT WAS CLRED TO TAXI TO RWY 2R VIA TXWY F. NEITHER THE CAPT NOR I HAD EXTENSIVE EXPERIENCE FLYING FROM RPLC. WHEN CLRED TO TAXI; THERE WAS NO SIGN OF TXWY F. WE DETERMINED VIA OUR ARPT DIAGRAM ITS POS. AS WE STARTED TO ROLL; WE WERE CLRED FOR TKOF ON RWY 2R. WE CROSSED A VERY WIDE UNMARKED TXWY THAT WE BOTH MISTOOK FOR RWY 2L. WHEN WE APCHED RWY 2L IT WAS NOT LABELED AND WE LINED UP FOR TKOF THINKING WE WERE ON RWY 2R. THE ONLY SIGN I SAW WAS ON THE FAR SIDE OF THE RWY AS WE POSITIONED THAT READ RWYS 2R/20L. BECAUSE THE RWYS (2L/2R) ARE STAGGERED WE DID NOT SEE THE R RWY AS WE POSITIONED (BOTH RWYS ARE OF EQUAL LENGTH). WHEN I LOOKED AT THE MAP TO CHK OUR ALIGNMENT; IT LOOKED TIGHT. AT APPROX 120 KTS; I HEARD THE CAPT SAY 'I THINK WE ARE ON THE WRONG RWY.' WE ROTATED AND CLBED WITHOUT FURTHER INCIDENT. THE ONLY XMISSION FROM TWR WAS TO CONTACT DEP PASSING 5000 FT.

Data retrieved from NASA's ASRS site as of January 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.