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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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ARTCC radar controller climbed an air carrier B767 to 15000 ft and turned him to a heading to pass below a military EA6 at 16000 ft. TA was given to the EA6 and he had the B767 in sight. The B767 received a TCASII RA to climb as the aircraft approached each other and the controller sees that the aircraft have passed and then climbs the B767. Controller reporter says the TCASII RA instructions were invalid.
| Attributes | |
| ACN | 368980 |
| Time | |
| Date | 199705 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sea |
| State Reference | WA |
| Altitude | msl bound lower : 15000 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zse |
| Operator | common carrier : air carrier |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Prowler (EA6B) |
| Operating Under FAR Part | other : other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 9 |
| ASRS Report | 368980 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 12600 vertical : 700 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Air carrier X departed sea for copenhagen, denmark, and checked on frequency climbing to 15000 ft. I restated the clearance to 15000 ft. 1 min later, the military Y (EA6) checked on frequency en route to whidbey NAS level at 16000 ft. I turned air carrier X right to heading 020 degrees to cross beneath the EA6. Then I turned the EA6 left to heading 250 degrees and called the B767 traffic at 12 O'clock, 2 mi, level at 15000 ft. After the EA6 responds, air carrier X states he had a TCASII RA to climb. I advise air carrier X of the EA6 passing on the right at 16000 ft. He answers traffic in sight. Traffic is no longer a factor and air carrier X gets climb and continues on course. The TCASII RA to climb does not make sense since the traffic had been level long before the traffic was close to each other. An RA to climb seems to be about the only thing that should not be done.
Original NASA ASRS Text
Title: ARTCC RADAR CTLR CLBED AN ACR B767 TO 15000 FT AND TURNED HIM TO A HDG TO PASS BELOW A MIL EA6 AT 16000 FT. TA WAS GIVEN TO THE EA6 AND HE HAD THE B767 IN SIGHT. THE B767 RECEIVED A TCASII RA TO CLB AS THE ACFT APCHED EACH OTHER AND THE CTLR SEES THAT THE ACFT HAVE PASSED AND THEN CLBS THE B767. CTLR RPTR SAYS THE TCASII RA INSTRUCTIONS WERE INVALID.
Narrative: ACR X DEPARTED SEA FOR COPENHAGEN, DENMARK, AND CHKED ON FREQ CLBING TO 15000 FT. I RESTATED THE CLRNC TO 15000 FT. 1 MIN LATER, THE MIL Y (EA6) CHKED ON FREQ ENRTE TO WHIDBEY NAS LEVEL AT 16000 FT. I TURNED ACR X R TO HDG 020 DEGS TO CROSS BENEATH THE EA6. THEN I TURNED THE EA6 L TO HDG 250 DEGS AND CALLED THE B767 TFC AT 12 O'CLOCK, 2 MI, LEVEL AT 15000 FT. AFTER THE EA6 RESPONDS, ACR X STATES HE HAD A TCASII RA TO CLB. I ADVISE ACR X OF THE EA6 PASSING ON THE R AT 16000 FT. HE ANSWERS TFC IN SIGHT. TFC IS NO LONGER A FACTOR AND ACR X GETS CLB AND CONTINUES ON COURSE. THE TCASII RA TO CLB DOES NOT MAKE SENSE SINCE THE TFC HAD BEEN LEVEL LONG BEFORE THE TFC WAS CLOSE TO EACH OTHER. AN RA TO CLB SEEMS TO BE ABOUT THE ONLY THING THAT SHOULD NOT BE DONE.
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.