Unauthorized runway entry. Potential conflict with arrival landing traffic.

Attributes
ACN	272317
Time
Date	199405
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : mex
State Reference	FO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : hlg
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	ground other : taxi
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer pilot : instrument pilot : cfi pilot : commercial
Experience	flight time last 90 days : 287 flight time total : 16000 flight time type : 2000
ASRS Report	272317
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : ground less severe incursion : runway non adherence : clearance non adherence : far other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We had finished the taxi and before takeoff checklist. It was my leg to fly. The captain was taxiing the aircraft. I had my head and eyes down in the cockpit reading the tol card and giving the takeoff briefing. When I looked up the captain had taxied through the runway hold line and was in the center of the taxiway exterior of the runway center line of runway 5R at mexico city airport. I looked to the left and saw an large aircraft on final 1 1/2 mi turning to the left to side step to runway 5L. As I was telling the captain we were on the taxiway extension to runway 5R the ground control advised us we were on the runway 5R. The captain made a 180 degree turn to the left and vacated the runway. Takeoff briefing should be done on the ramp with the aircraft parked, not on the taxi roll.

Original NASA ASRS Text

Title: UNAUTH RWY ENTRY. POTENTIAL CONFLICT WITH ARR LNDG TFC.

Narrative: WE HAD FINISHED THE TAXI AND BEFORE TKOF CHKLIST. IT WAS MY LEG TO FLY. THE CAPT WAS TAXIING THE ACFT. I HAD MY HEAD AND EYES DOWN IN THE COCKPIT READING THE TOL CARD AND GIVING THE TKOF BRIEFING. WHEN I LOOKED UP THE CAPT HAD TAXIED THROUGH THE RWY HOLD LINE AND WAS IN THE CTR OF THE TXWY EXTERIOR OF THE RWY CTR LINE OF RWY 5R AT MEXICO CITY ARPT. I LOOKED TO THE L AND SAW AN LARGE ACFT ON FINAL 1 1/2 MI TURNING TO THE L TO SIDE STEP TO RWY 5L. AS I WAS TELLING THE CAPT WE WERE ON THE TXWY EXTENSION TO RWY 5R THE GND CTL ADVISED US WE WERE ON THE RWY 5R. THE CAPT MADE A 180 DEG TURN TO THE L AND VACATED THE RWY. TKOF BRIEFING SHOULD BE DONE ON THE RAMP WITH THE ACFT PARKED, NOT ON THE TAXI ROLL.

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.