Air carrier Y landing on occupied runway had less than standard separation from air carrier X. Syste...

Attributes
ACN	168645
Time
Date	199101
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : anc
State Reference	AK
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Dusk
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 4 Turbojet Eng
Navigation In Use	Other
Flight Phase	ground other : taxi landing other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
ASRS Report	168645
Person 2
Affiliation	government : faa
Qualification	controller : non radar
Events
Anomaly	conflict : ground critical non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	Other
Miss Distance	horizontal : 6000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure Operational Error

Narrative:

WX 1/2 mi south and bs. Air carrier X landed on runway 6R. Did not clear runway before air carrier Y landed. I thought air carrier X was clear, as he had turned 90 degrees and I thought he was exiting on the taxiway. The person working cabin coordinator was watching the asde and didn't say anything, so I assumed that there was nothing to worry about and that my visibility observation was correct. At the time there were 8 aircraft ready for departure on runway 14. We had bad WX, short staffing, heavy traffic through a lot of the day. The person on cabin coordinator was a newly checked out person. The runway confign is one of the most difficult we ever work. I could certainly have used a little more help. We have been after the state to correct a problem with the taxiway signs and their response is that they are setup technically correct, even though they cause a lot of confusion and pilots turning at the wrong taxiway.

Original NASA ASRS Text

Title: ACR Y LNDG ON OCCUPIED RWY HAD LESS THAN STANDARD SEPARATION FROM ACR X. SYSTEM ERROR.

Narrative: WX 1/2 MI S AND BS. ACR X LANDED ON RWY 6R. DID NOT CLR RWY BEFORE ACR Y LANDED. I THOUGHT ACR X WAS CLR, AS HE HAD TURNED 90 DEGS AND I THOUGHT HE WAS EXITING ON THE TXWY. THE PERSON WORKING CABIN COORDINATOR WAS WATCHING THE ASDE AND DIDN'T SAY ANYTHING, SO I ASSUMED THAT THERE WAS NOTHING TO WORRY ABOUT AND THAT MY VIS OBSERVATION WAS CORRECT. AT THE TIME THERE WERE 8 ACFT READY FOR DEP ON RWY 14. WE HAD BAD WX, SHORT STAFFING, HEAVY TFC THROUGH A LOT OF THE DAY. THE PERSON ON CABIN COORDINATOR WAS A NEWLY CHKED OUT PERSON. THE RWY CONFIGN IS ONE OF THE MOST DIFFICULT WE EVER WORK. I COULD CERTAINLY HAVE USED A LITTLE MORE HELP. WE HAVE BEEN AFTER THE STATE TO CORRECT A PROB WITH THE TXWY SIGNS AND THEIR RESPONSE IS THAT THEY ARE SETUP TECHNICALLY CORRECT, EVEN THOUGH THEY CAUSE A LOT OF CONFUSION AND PLTS TURNING AT THE WRONG TXWY.

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.

Air carrier Y landing on occupied runway had less than standard separation from air carrier X. System error.