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Multiple runway operation parallel runways. Air carrier X had less than standard separation from medium large transport takeoff on parallel runways.
| Attributes | |
| ACN | 242234 |
| Time | |
| Date | 199305 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : dtw |
| State Reference | MI |
| Altitude | msl bound lower : 1200 msl bound upper : 1200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dtw tower : dtw tower : hut |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude climbout : initial climbout : takeoff |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : takeoff climbout : intermediate altitude climbout : initial |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 15000 flight time type : 7000 |
| ASRS Report | 242234 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 15000 flight time type : 7000 |
| ASRS Report | 242233 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 400 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Inter Facility Coordination Failure |
Narrative:
Air carrier X departed dtw. The tower (local) gave a widebody transport that departed ahead of us a 230 heading and told him to report on the heading. Tower told us that the preceding widebody transport was turning right and cleared us to depart runway 21R and maintain runway heading. We replied that we had the widebody transport in sight, runway heading and cleared to go. Unknown to us, another medium large transport was cleared to depart with runway heading instructions at the same time from runway 21C (on tower frequency 118.4 -- we were on 135.0). Tower never assigned us any other heading and turned us over to departure. We checked in with departure saying 'air carrier X with you out of 1200 ft climbing to 10000). He left us on runway heading until approximately out of 3000 ft when he said 'turn right immediately to a heading of 260 degrees.' we had watched the other medium large transport through the climb as he paralleled us both visually and on TCASII. Supplemental information from acn 242233: after takeoff, medium large transport on runway 29C was launched at same time as us, and after switch to departure, we noticed a potential conflict on TCASII. Departure controller told us to fly 260 degrees immediately, then asked what heading was assigned by tower -- heading was runway heading. Separation was 1 mi and 400 ft vertical when 260 degree heading was assigned. I suspect we should have been assigned the 230 degree heading, not the runway heading we followed off runway 21R.
Original NASA ASRS Text
Title: MULTIPLE RWY OP PARALLEL RWYS. ACR X HAD LTSS FROM MLG TKOF ON PARALLEL RWYS.
Narrative: ACR X DEPARTED DTW. THE TWR (LCL) GAVE A WDB THAT DEPARTED AHEAD OF US A 230 HDG AND TOLD HIM TO RPT ON THE HDG. TWR TOLD US THAT THE PRECEDING WDB WAS TURNING R AND CLRED US TO DEPART RWY 21R AND MAINTAIN RWY HDG. WE REPLIED THAT WE HAD THE WDB IN SIGHT, RWY HDG AND CLRED TO GO. UNKNOWN TO US, ANOTHER MLG WAS CLRED TO DEPART WITH RWY HDG INSTRUCTIONS AT THE SAME TIME FROM RWY 21C (ON TWR FREQ 118.4 -- WE WERE ON 135.0). TWR NEVER ASSIGNED US ANY OTHER HDG AND TURNED US OVER TO DEP. WE CHKED IN WITH DEP SAYING 'ACR X WITH YOU OUT OF 1200 FT CLBING TO 10000). HE LEFT US ON RWY HDG UNTIL APPROX OUT OF 3000 FT WHEN HE SAID 'TURN R IMMEDIATELY TO A HDG OF 260 DEGS.' WE HAD WATCHED THE OTHER MLG THROUGH THE CLB AS HE PARALLELED US BOTH VISUALLY AND ON TCASII. SUPPLEMENTAL INFO FROM ACN 242233: AFTER TKOF, MLG ON RWY 29C WAS LAUNCHED AT SAME TIME AS US, AND AFTER SWITCH TO DEP, WE NOTICED A POTENTIAL CONFLICT ON TCASII. DEP CTLR TOLD US TO FLY 260 DEGS IMMEDIATELY, THEN ASKED WHAT HDG WAS ASSIGNED BY TWR -- HDG WAS RWY HDG. SEPARATION WAS 1 MI AND 400 FT VERT WHEN 260 DEG HDG WAS ASSIGNED. I SUSPECT WE SHOULD HAVE BEEN ASSIGNED THE 230 DEG HDG, NOT THE RWY HDG WE FOLLOWED OFF RWY 21R.
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.