Critical ground conflict between landing and departing air carrier traffic at ont.

Attributes
ACN	202880
Time
Date	199202
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ont
State Reference	CA
Altitude	agl bound lower : 200 agl bound upper : 300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ont artcc : eggx
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent : approach landing : go around
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : takeoff climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 7000 flight time type : 300
ASRS Report	202880
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : ground critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 500 vertical : 150
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

While on short final to ontario on the 26L ILS, tower put air carrier medium large transport Y in position and hold on 26L. Tower did not clear medium large transport Y to takeoff until we were about 300 ft AGL. At 200 ft it was obvious that we were going to hit medium large transport Y if corrective action were not taken. We initiated a go around. Tower did not say anything except 'medium large transport X cleared for right downwind.' we turned right downwind and landed. This was even more unusual since our aircraft had a slat malfunction (which ATC knew about). I called tower supervisor on telephone after landing. Supervisor said a trainee was handling our arrival and should not have let the situation develop.

Original NASA ASRS Text

Title: CRITICAL GND CONFLICT BTWN LNDG AND DEPARTING ACR TFC AT ONT.

Narrative: WHILE ON SHORT FINAL TO ONTARIO ON THE 26L ILS, TWR PUT ACR MLG Y IN POS AND HOLD ON 26L. TWR DID NOT CLR MLG Y TO TKOF UNTIL WE WERE ABOUT 300 FT AGL. AT 200 FT IT WAS OBVIOUS THAT WE WERE GOING TO HIT MLG Y IF CORRECTIVE ACTION WERE NOT TAKEN. WE INITIATED A GAR. TWR DID NOT SAY ANYTHING EXCEPT 'MLG X CLRED FOR R DOWNWIND.' WE TURNED R DOWNWIND AND LANDED. THIS WAS EVEN MORE UNUSUAL SINCE OUR ACFT HAD A SLAT MALFUNCTION (WHICH ATC KNEW ABOUT). I CALLED TWR SUPVR ON TELEPHONE AFTER LNDG. SUPVR SAID A TRAINEE WAS HANDLING OUR ARR AND SHOULD NOT HAVE LET THE SITUATION DEVELOP.

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.