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B727 flight crew are questioned by ZNY controller about previously issued clearance apparently due to a developing potential conflict with another aircraft.
| Attributes | |
| ACN | 517521 |
| Time | |
| Date | 200107 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : lrp.vortac |
| State Reference | PA |
| Altitude | msl single value : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zny.artcc |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 517521 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 4000 flight time type : 700 |
| ASRS Report | 517624 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance controller : issued advisory |
| Consequence | faa : reviewed incident with flight crew faa : investigated |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
On a flight from bos to dfw, while in ZNY's airspace, we were given a vector of 260 degrees and direct lrp VOR when able. We were then given a vector of 270 degrees for traffic. Later, we were given a vector of 260 degrees, direct lrp when able. We told center we were receiving lrp and proceeding direct with about a 15 degree left turn. Several mins later, we were given the next sector's frequency and told to expect a heading to hvq from them. We replied that the transmission was garbled and verified the frequency only. We checked in on the new frequency and center later gave us a heading of 280 degrees for traffic. Although it wasn't very apparent to us, evidently, they stopped another flight's climb due to separation. Center then asked us several times what our previous clearance had been. We subsequently were given a phone number to call to discuss this with center. Evidently, during the garbled transmission, there was a clearance given that we didn't hear or misunderstood. In retrospect, we should have questioned the whole transmission, not just the frequency, and center should have made sure we understood the whole transmission.
Original NASA ASRS Text
Title: B727 FLC ARE QUESTIONED BY ZNY CTLR ABOUT PREVIOUSLY ISSUED CLRNC APPARENTLY DUE TO A DEVELOPING POTENTIAL CONFLICT WITH ANOTHER ACFT.
Narrative: ON A FLT FROM BOS TO DFW, WHILE IN ZNY'S AIRSPACE, WE WERE GIVEN A VECTOR OF 260 DEGS AND DIRECT LRP VOR WHEN ABLE. WE WERE THEN GIVEN A VECTOR OF 270 DEGS FOR TFC. LATER, WE WERE GIVEN A VECTOR OF 260 DEGS, DIRECT LRP WHEN ABLE. WE TOLD CTR WE WERE RECEIVING LRP AND PROCEEDING DIRECT WITH ABOUT A 15 DEG L TURN. SEVERAL MINS LATER, WE WERE GIVEN THE NEXT SECTOR'S FREQ AND TOLD TO EXPECT A HDG TO HVQ FROM THEM. WE REPLIED THAT THE XMISSION WAS GARBLED AND VERIFIED THE FREQ ONLY. WE CHKED IN ON THE NEW FREQ AND CTR LATER GAVE US A HDG OF 280 DEGS FOR TFC. ALTHOUGH IT WASN'T VERY APPARENT TO US, EVIDENTLY, THEY STOPPED ANOTHER FLT'S CLB DUE TO SEPARATION. CTR THEN ASKED US SEVERAL TIMES WHAT OUR PREVIOUS CLRNC HAD BEEN. WE SUBSEQUENTLY WERE GIVEN A PHONE NUMBER TO CALL TO DISCUSS THIS WITH CTR. EVIDENTLY, DURING THE GARBLED XMISSION, THERE WAS A CLRNC GIVEN THAT WE DIDN'T HEAR OR MISUNDERSTOOD. IN RETROSPECT, WE SHOULD HAVE QUESTIONED THE WHOLE XMISSION, NOT JUST THE FREQ, AND CTR SHOULD HAVE MADE SURE WE UNDERSTOOD THE WHOLE XMISSION.
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.