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Loss of separation when reporter's aircraft crossed runway 16L while other air carrier was on takeoff roll on runway 16L. Flight crew had been told to hold short of runway 16L but read back cleared to cross.
| Attributes | |
| ACN | 388872 |
| Time | |
| Date | 199712 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sea |
| State Reference | WA |
| 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 | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | ground other : taxi |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | climbout : takeoff other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer pilot : commercial |
| Experience | flight time last 90 days : 80 flight time total : 4600 flight time type : 2000 |
| ASRS Report | 388872 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 240 flight time total : 3700 flight time type : 1200 |
| ASRS Report | 388880 |
| Events | |
| Anomaly | conflict : ground less severe non adherence : required legal separation non adherence : published procedure non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Pilot Deviation |
Narrative:
On landing rollout runway 16R at sea-tac, tower cleared us to hold short of runway 16L. We understood tower to say clear to cross runway 16L. We read back: 'roger, clear to cross runway 16L.' tower did not respond or correct our transmission. (Tower tape verifies these xmissions to be accurate.) we crossed runway 16L safely, but aircraft on runway 16L was told to abort takeoff. Landing rollout is a busy time. Controllers must listen to pilot readbacks closely. Supplemental information from acn 388880: the captain looked up runway 16L and saw an aircraft at the end of the runway that appeared to be positioned and holding for us to cross. We proceeded to cross the runway. We were then told that our instructions had been to hold short of runway 16L. The aircraft on the runway had been cleared for takeoff. We cleared the runway and were told to phone tower after we blocked in. It was a miscom that was worsened due to our receiving the information just as we were passing control of the aircraft.
Original NASA ASRS Text
Title: LOSS OF SEPARATION WHEN RPTR'S ACFT CROSSED RWY 16L WHILE OTHER ACR WAS ON TKOF ROLL ON RWY 16L. FLC HAD BEEN TOLD TO HOLD SHORT OF RWY 16L BUT READ BACK CLRED TO CROSS.
Narrative: ON LNDG ROLLOUT RWY 16R AT SEA-TAC, TWR CLRED US TO HOLD SHORT OF RWY 16L. WE UNDERSTOOD TWR TO SAY CLR TO CROSS RWY 16L. WE READ BACK: 'ROGER, CLR TO CROSS RWY 16L.' TWR DID NOT RESPOND OR CORRECT OUR XMISSION. (TWR TAPE VERIFIES THESE XMISSIONS TO BE ACCURATE.) WE CROSSED RWY 16L SAFELY, BUT ACFT ON RWY 16L WAS TOLD TO ABORT TKOF. LNDG ROLLOUT IS A BUSY TIME. CTLRS MUST LISTEN TO PLT READBACKS CLOSELY. SUPPLEMENTAL INFO FROM ACN 388880: THE CAPT LOOKED UP RWY 16L AND SAW AN ACFT AT THE END OF THE RWY THAT APPEARED TO BE POSITIONED AND HOLDING FOR US TO CROSS. WE PROCEEDED TO CROSS THE RWY. WE WERE THEN TOLD THAT OUR INSTRUCTIONS HAD BEEN TO HOLD SHORT OF RWY 16L. THE ACFT ON THE RWY HAD BEEN CLRED FOR TKOF. WE CLRED THE RWY AND WERE TOLD TO PHONE TWR AFTER WE BLOCKED IN. IT WAS A MISCOM THAT WAS WORSENED DUE TO OUR RECEIVING THE INFO JUST AS WE WERE PASSING CTL OF THE ACFT.
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.