Landing on occupied runway.

Attributes
ACN	284520
Time
Date	199409
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : mdw
State Reference	IL
Altitude	agl bound lower : 0 agl bound upper : 100
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach landing other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B737 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 : first officer
Qualification	pilot : flight engineer pilot : cfi pilot : atp
Experience	flight time last 90 days : 217 flight time total : 9140 flight time type : 450
ASRS Report	284520
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : ground critical non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 70
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation Operational Error

Narrative:

On approach into midway's runway 31L, flight was cleared to land on runway 31L. The approach continued normally until just crossing the threshold. I noticed 2 conical shaped beams of light on the overrun portion of runway 13L. I was unsure of the source of the light but reported. To the captain that there may have been an aircraft in position and hold. (On runway 31L) by this time there was no visible conflict and the landing continued normally. No strobes, anticollision, wing or TCASII was observed. On taxi-in the tower requested we call them. We then learned that they cleared a 737 into position and cleared us to land also.

Original NASA ASRS Text

Title: LNDG ON OCCUPIED RWY.

Narrative: ON APCH INTO MIDWAY'S RWY 31L, FLT WAS CLRED TO LAND ON RWY 31L. THE APCH CONTINUED NORMALLY UNTIL JUST XING THE THRESHOLD. I NOTICED 2 CONICAL SHAPED BEAMS OF LIGHT ON THE OVERRUN PORTION OF RWY 13L. I WAS UNSURE OF THE SOURCE OF THE LIGHT BUT RPTED. TO THE CAPT THAT THERE MAY HAVE BEEN AN ACFT IN POS AND HOLD. (ON RWY 31L) BY THIS TIME THERE WAS NO VISIBLE CONFLICT AND THE LNDG CONTINUED NORMALLY. NO STROBES, ANTICOLLISION, WING OR TCASII WAS OBSERVED. ON TAXI-IN THE TWR REQUESTED WE CALL THEM. WE THEN LEARNED THAT THEY CLRED A 737 INTO POS AND CLRED US TO LAND ALSO.

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.