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Potential conflict less than standard separation between 2 simultaneous departure aircraft on multiple runway operation parallel runways.
| Attributes | |
| ACN | 204912 |
| Time | |
| Date | 199203 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lax |
| State Reference | CA |
| Altitude | agl bound lower : 0 agl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : takeoff climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : takeoff climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 210 flight time total : 17000 flight time type : 4000 |
| ASRS Report | 204912 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : far non adherence : published procedure non adherence : required legal separation other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 800 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Pilot Deviation Operational Error |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
| Airport | other physical facility |
Narrative:
Los angeles tower cleared an air carrier large transport across 24L over to 24R. Although I did not hear it, first officer said air carrier Y was cleared for takeoff on 24R. We were cleared into position on 24L after air carrier Y crossed the runway. Later being cleared for takeoff. Halfway through takeoff roll, I noticed air carrier Y rolling on the adjacent runway. We both broke ground at the same time, air carrier Y just slightly ahead of us and to our right. Both of us were on a 250 degree heading, climbing to 2000 ft. I discussed this with one our management pilots who said this has happened before and that the tower can legally do this. Seems risky to me. I would not have elected to takeoff if I had seen air carrier Y, but the aircraft was out of my view until we were too far into takeoff to risk rejecting. About 3 mi west of runway, departure gave us a diverging 235 degree heading.
Original NASA ASRS Text
Title: POTENTIAL CONFLICT LTSS BTWN 2 SIMULTANEOUS DEP ACFT ON MULTIPLE RWY OP PARALLEL RWYS.
Narrative: LOS ANGELES TWR CLRED AN ACR LGT ACROSS 24L OVER TO 24R. ALTHOUGH I DID NOT HEAR IT, FO SAID ACR Y WAS CLRED FOR TKOF ON 24R. WE WERE CLRED INTO POS ON 24L AFTER ACR Y CROSSED THE RWY. LATER BEING CLRED FOR TKOF. HALFWAY THROUGH TKOF ROLL, I NOTICED ACR Y ROLLING ON THE ADJACENT RWY. WE BOTH BROKE GND AT THE SAME TIME, ACR Y JUST SLIGHTLY AHEAD OF US AND TO OUR R. BOTH OF US WERE ON A 250 DEG HDG, CLBING TO 2000 FT. I DISCUSSED THIS WITH ONE OUR MGMNT PLTS WHO SAID THIS HAS HAPPENED BEFORE AND THAT THE TWR CAN LEGALLY DO THIS. SEEMS RISKY TO ME. I WOULD NOT HAVE ELECTED TO TKOF IF I HAD SEEN ACR Y, BUT THE ACFT WAS OUT OF MY VIEW UNTIL WE WERE TOO FAR INTO TKOF TO RISK REJECTING. ABOUT 3 MI W OF RWY, DEP GAVE US A DIVERGING 235 DEG HDG.
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.