 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Flight crew of an light transport was instructed to stop their departure climb and level off at a lower altitude. A B727 climbing at a lower altitude was given a turn by ATC in response to a TCASII RA reported by the pilot.
| Attributes | |
| ACN | 341722 |
| Time | |
| Date | 199607 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 3000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Beech 1900 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other departure sid : sid |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer pilot : cfi |
| Experience | flight time last 90 days : 150 flight time total : 7300 flight time type : 700 |
| ASRS Report | 341722 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Upon takeoff we were cleared to 5000 ft, fly heading of 090 degrees. An air carrier Y B727 took off ahead of us, he was assigned a 110 degree heading, I think. After handoff to departure, we were out of 3300 ft established on a 090 degree heading when departure told us to level off at 3000 ft. Air carrier Y was turned to 040 degrees and he was below us climbing as well and he got an RA during climbing. We saw him as he was making a turn and climbing. I think the B727 for some reason was slow, climbing slowly and ATC was after him to hurry his turn. So I think his reduced performance caused ATC to misjudge spacing and allow the B727 to get close enough for an RA. We didn't see traffic and weren't issued any TA's by ATC, and since we are beech 1900 we'll never outclb or catch a B727 during climb out. We took no evasive action and didn't see the B727's flight path until after his RA turn, so I don't know whether or not any conflict existed or would have been possible.
Original NASA ASRS Text
Title: FLC OF AN LTT WAS INSTRUCTED TO STOP THEIR DEP CLB AND LEVEL OFF AT A LOWER ALT. A B727 CLBING AT A LOWER ALT WAS GIVEN A TURN BY ATC IN RESPONSE TO A TCASII RA RPTED BY THE PLT.
Narrative: UPON TKOF WE WERE CLRED TO 5000 FT, FLY HDG OF 090 DEGS. AN ACR Y B727 TOOK OFF AHEAD OF US, HE WAS ASSIGNED A 110 DEG HDG, I THINK. AFTER HDOF TO DEP, WE WERE OUT OF 3300 FT ESTABLISHED ON A 090 DEG HDG WHEN DEP TOLD US TO LEVEL OFF AT 3000 FT. ACR Y WAS TURNED TO 040 DEGS AND HE WAS BELOW US CLBING AS WELL AND HE GOT AN RA DURING CLBING. WE SAW HIM AS HE WAS MAKING A TURN AND CLBING. I THINK THE B727 FOR SOME REASON WAS SLOW, CLBING SLOWLY AND ATC WAS AFTER HIM TO HURRY HIS TURN. SO I THINK HIS REDUCED PERFORMANCE CAUSED ATC TO MISJUDGE SPACING AND ALLOW THE B727 TO GET CLOSE ENOUGH FOR AN RA. WE DIDN'T SEE TFC AND WEREN'T ISSUED ANY TA'S BY ATC, AND SINCE WE ARE BEECH 1900 WE'LL NEVER OUTCLB OR CATCH A B727 DURING CLBOUT. WE TOOK NO EVASIVE ACTION AND DIDN'T SEE THE B727'S FLT PATH UNTIL AFTER HIS RA TURN, SO I DON'T KNOW WHETHER OR NOT ANY CONFLICT EXISTED OR WOULD HAVE BEEN POSSIBLE.
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.