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Local controller approved a request from ground controller to cross the active runway, then cleared a B737 for takeoff that was 500 ft from the runway. The aircraft crossing the runway stopped before clearing the runway on the other side, causing the B737 to abort takeoff.
| Attributes | |
| ACN | 379594 |
| Time | |
| Date | 199709 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : phl |
| State Reference | PA |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : takeoff other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | ground : holding ground other : taxi |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar |
| Experience | controller non radar : 1 controller radar : 10 flight time total : 2000 |
| ASRS Report | 379594 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : ground |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : ground less severe incursion : runway non adherence : clearance non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : rejected takeoff none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Ground controller had requested permission to cross active runway with a single aircraft. I observed the aircraft crossing as a departure approached the runway for takeoff. Since the departure aircraft was still 500 ft from runway end and crossing aircraft was almost clear, I issued takeoff clearance to departure aircraft. Crossing aircraft stopped before aircraft empennage was fully clear of runway apparently, since departure aircraft aborted takeoff roll after 50 ft of roll and stated the crossing traffic was not completely clear. A scan of the asde surface radar at that time showed aircraft subsequently was clear of runway. Moral: apply positive separation in this situation since anticipated separation cannot be ensured.
Original NASA ASRS Text
Title: LCL CTLR APPROVED A REQUEST FROM GND CTLR TO CROSS THE ACTIVE RWY, THEN CLRED A B737 FOR TKOF THAT WAS 500 FT FROM THE RWY. THE ACFT XING THE RWY STOPPED BEFORE CLRING THE RWY ON THE OTHER SIDE, CAUSING THE B737 TO ABORT TKOF.
Narrative: GND CTLR HAD REQUESTED PERMISSION TO CROSS ACTIVE RWY WITH A SINGLE ACFT. I OBSERVED THE ACFT XING AS A DEP APCHED THE RWY FOR TKOF. SINCE THE DEP ACFT WAS STILL 500 FT FROM RWY END AND XING ACFT WAS ALMOST CLR, I ISSUED TKOF CLRNC TO DEP ACFT. XING ACFT STOPPED BEFORE ACFT EMPENNAGE WAS FULLY CLR OF RWY APPARENTLY, SINCE DEP ACFT ABORTED TKOF ROLL AFTER 50 FT OF ROLL AND STATED THE XING TFC WAS NOT COMPLETELY CLR. A SCAN OF THE ASDE SURFACE RADAR AT THAT TIME SHOWED ACFT SUBSEQUENTLY WAS CLR OF RWY. MORAL: APPLY POSITIVE SEPARATION IN THIS SIT SINCE ANTICIPATED SEPARATION CANNOT BE ENSURED.
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.