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Very close to V1, a B737 is asked by the local controller to abort on runway 7L at las if he can. An apparent crossing of the hold short line at A6 by a B757 was the reason for the call. Takeoff was continued.
| Attributes | |
| ACN | 610556 |
| Time | |
| Date | 200403 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : las.airport |
| State Reference | NV |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : takeoff roll |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : las.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : holding |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 20000 flight time type : 14000 |
| ASRS Report | 610556 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : multi engine pilot : commercial |
| Experience | flight time last 90 days : 150 flight time total : 8192 flight time type : 2647 |
| ASRS Report | 610557 |
| Events | |
| Anomaly | conflict : ground less severe incursion : runway non adherence : clearance non adherence : far |
| Independent Detector | other controllera other flight crewa other flight crewb |
| Resolutory Action | none taken : anomaly accepted none taken : insufficient time |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 150 |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Ambiguous |
Narrative:
Departing runway 7L at las from intersection A8, we were cleared for takeoff. Prior to commencing the takeoff roll, we saw another air carriersouth B757 approaching runway 7L at intersection A6 ahead of us where it was to hold short. It looked like it might not hold short, so we held until seeing the B757 stop. Feeling secure that the B757 was stopped and clear of the runway, I began the takeoff. At a speed of around 100 KTS, the tower said 'company, abort the takeoff if you can.' we were within 10 KTS of our V1 speed and I saw no safety of flight issues and continued the takeoff. The only reason I could think that we were asked to abort was because the B757 had gone beyond the hold point for runway 7L. The B757 had not advised this and the tower had not advised us of that. We continued uneventfully to destination. I called the tower to find out about the reason for the abort call. They indicated everything was alright unless we wanted to pursue it. I indicated that we did not. At that point in the takeoff, had we aborted we would have had a high speed abort and gone through the intersection that was in question. In my opinion we were completely safe at all times. We had plenty of clearance to make that takeoff or I would not have commenced it. I do question the use of crossing the active to taxi for takeoff when another route to the runway was available. Supplemental information from acn 610557: captain's leg. Las tower gave us 'position and hold runway 7L at intersection A8.' another carrier B757 at A6 or A5 southbound was told to 'hold short of runway 7L.' we were 'cleared for takeoff,' but hesitated until the B757 stopped, which it did seemingly well short of runway 7L. As we were accelerating between the '80 KTS' call and V1, las tower said, 'company number, abort your takeoff, if you can safely.' (phraseology as accurate as I can recall.) by this time we were close to V1 and there was no threat in front of us, so we elected to continue the takeoff in the interest of safety. The B757 did not seem to 'loom' into our takeoff safety margin, nor did a high speed abort seem like a safer option. The remainder of the takeoff and flight was normal.
Original NASA ASRS Text
Title: VERY CLOSE TO V1, A B737 IS ASKED BY THE LCL CTLR TO ABORT ON RWY 7L AT LAS IF HE CAN. AN APPARENT XING OF THE HOLD SHORT LINE AT A6 BY A B757 WAS THE REASON FOR THE CALL. TKOF WAS CONTINUED.
Narrative: DEPARTING RWY 7L AT LAS FROM INTXN A8, WE WERE CLRED FOR TKOF. PRIOR TO COMMENCING THE TKOF ROLL, WE SAW ANOTHER ACRS B757 APCHING RWY 7L AT INTXN A6 AHEAD OF US WHERE IT WAS TO HOLD SHORT. IT LOOKED LIKE IT MIGHT NOT HOLD SHORT, SO WE HELD UNTIL SEEING THE B757 STOP. FEELING SECURE THAT THE B757 WAS STOPPED AND CLR OF THE RWY, I BEGAN THE TKOF. AT A SPD OF AROUND 100 KTS, THE TWR SAID 'COMPANY, ABORT THE TKOF IF YOU CAN.' WE WERE WITHIN 10 KTS OF OUR V1 SPD AND I SAW NO SAFETY OF FLT ISSUES AND CONTINUED THE TKOF. THE ONLY REASON I COULD THINK THAT WE WERE ASKED TO ABORT WAS BECAUSE THE B757 HAD GONE BEYOND THE HOLD POINT FOR RWY 7L. THE B757 HAD NOT ADVISED THIS AND THE TWR HAD NOT ADVISED US OF THAT. WE CONTINUED UNEVENTFULLY TO DEST. I CALLED THE TWR TO FIND OUT ABOUT THE REASON FOR THE ABORT CALL. THEY INDICATED EVERYTHING WAS ALRIGHT UNLESS WE WANTED TO PURSUE IT. I INDICATED THAT WE DID NOT. AT THAT POINT IN THE TKOF, HAD WE ABORTED WE WOULD HAVE HAD A HIGH SPD ABORT AND GONE THROUGH THE INTXN THAT WAS IN QUESTION. IN MY OPINION WE WERE COMPLETELY SAFE AT ALL TIMES. WE HAD PLENTY OF CLRNC TO MAKE THAT TKOF OR I WOULD NOT HAVE COMMENCED IT. I DO QUESTION THE USE OF XING THE ACTIVE TO TAXI FOR TKOF WHEN ANOTHER RTE TO THE RWY WAS AVAILABLE. SUPPLEMENTAL INFO FROM ACN 610557: CAPT'S LEG. LAS TWR GAVE US 'POS AND HOLD RWY 7L AT INTXN A8.' ANOTHER CARRIER B757 AT A6 OR A5 SBND WAS TOLD TO 'HOLD SHORT OF RWY 7L.' WE WERE 'CLRED FOR TKOF,' BUT HESITATED UNTIL THE B757 STOPPED, WHICH IT DID SEEMINGLY WELL SHORT OF RWY 7L. AS WE WERE ACCELERATING BTWN THE '80 KTS' CALL AND V1, LAS TWR SAID, 'COMPANY NUMBER, ABORT YOUR TKOF, IF YOU CAN SAFELY.' (PHRASEOLOGY AS ACCURATE AS I CAN RECALL.) BY THIS TIME WE WERE CLOSE TO V1 AND THERE WAS NO THREAT IN FRONT OF US, SO WE ELECTED TO CONTINUE THE TKOF IN THE INTEREST OF SAFETY. THE B757 DID NOT SEEM TO 'LOOM' INTO OUR TKOF SAFETY MARGIN, NOR DID A HIGH SPD ABORT SEEM LIKE A SAFER OPTION. THE REMAINDER OF THE TKOF AND FLT WAS NORMAL.
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.