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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Mlt fails to respond to center instructions to turn. Controller turns air carrier but aircraft slow to allow such a steep bank. Close proximity.
| Attributes | |
| ACN | 217824 |
| Time | |
| Date | 199208 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : iiu |
| State Reference | KY |
| Altitude | msl bound lower : 37000 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Military Transport |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : flight engineer pilot : instrument pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 60 flight time total : 18000 flight time type : 1000 |
| ASRS Report | 217824 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe inflight encounter : weather non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 36000 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were working ZID on 133.05 megahertz. The busy center controller was telling a military (mlt I think) located somewhere to our 10-11 O'clock position also at FL370 to take an immediate heading to the east (plus or minus, I think). The mlt plane did not acknowledge. We could not see him on TCASII as I think he was behind a cell 20-30 mi away. The controller tried several times to contact mlt with whom he had previously been in communication. The controller gave us an immediate turn left to 360 degrees. I pushed heading select and commanded maximum bank angle along with a heading command of 360 degrees. The sluggish autoplt did not understand the urgent nature of the turn, so I disconnected while passing about 045 degrees and flew the ADI. Just then, my super cool calm and collected first officer informed me he had the bugger on TCASII ahead to the left (10 to 1030 O'clock plus or minus) at 10 or so mi and closing from the northeast to the southwest. I was in about a 30 degree bank at the time, hanging on for dear life and holding altitude and muttering. The controller gave an urgent command us to turn quickly to a heading of 330 degrees. First officer with a different tone to his voice commanded me to turn. By now, I was in a 40 degree bank plus or minus and first officer was giving me the closure distance from TCASII (which to say the least is slow at updating) '9 mi -- 8 mi -- 7 mi.' then, as our heading passed 020 degrees, 12 O'clock, 6 1/2 mi -- pause, 7 mi he's moving away! As we passed 350 degrees the center told us to turn right and proceed on course. He then demanded of the mlt what right he had to deviate as he did without permission. He instructed the mlt to call a certain telephone number due to activation of the center proximity warning system etc. There was a shift change then and the new controller gave me the supervisor's phone number which I called. He told me all the voice and radar tapes had been pulled for investigation.
Original NASA ASRS Text
Title: MLT FAILS TO RESPOND TO CTR INSTRUCTIONS TO TURN. CTLR TURNS ACR BUT ACFT SLOW TO ALLOW SUCH A STEEP BANK. CLOSE PROX.
Narrative: WE WERE WORKING ZID ON 133.05 MEGAHERTZ. THE BUSY CTR CTLR WAS TELLING A MIL (MLT I THINK) LOCATED SOMEWHERE TO OUR 10-11 O'CLOCK POS ALSO AT FL370 TO TAKE AN IMMEDIATE HDG TO THE E (PLUS OR MINUS, I THINK). THE MLT PLANE DID NOT ACKNOWLEDGE. WE COULD NOT SEE HIM ON TCASII AS I THINK HE WAS BEHIND A CELL 20-30 MI AWAY. THE CTLR TRIED SEVERAL TIMES TO CONTACT MLT WITH WHOM HE HAD PREVIOUSLY BEEN IN COM. THE CTLR GAVE US AN IMMEDIATE TURN L TO 360 DEGS. I PUSHED HDG SELECT AND COMMANDED MAX BANK ANGLE ALONG WITH A HDG COMMAND OF 360 DEGS. THE SLUGGISH AUTOPLT DID NOT UNDERSTAND THE URGENT NATURE OF THE TURN, SO I DISCONNECTED WHILE PASSING ABOUT 045 DEGS AND FLEW THE ADI. JUST THEN, MY SUPER COOL CALM AND COLLECTED FO INFORMED ME HE HAD THE BUGGER ON TCASII AHEAD TO THE L (10 TO 1030 O'CLOCK PLUS OR MINUS) AT 10 OR SO MI AND CLOSING FROM THE NE TO THE SW. I WAS IN ABOUT A 30 DEG BANK AT THE TIME, HANGING ON FOR DEAR LIFE AND HOLDING ALT AND MUTTERING. THE CTLR GAVE AN URGENT COMMAND US TO TURN QUICKLY TO A HDG OF 330 DEGS. FO WITH A DIFFERENT TONE TO HIS VOICE COMMANDED ME TO TURN. BY NOW, I WAS IN A 40 DEG BANK PLUS OR MINUS AND FO WAS GIVING ME THE CLOSURE DISTANCE FROM TCASII (WHICH TO SAY THE LEAST IS SLOW AT UPDATING) '9 MI -- 8 MI -- 7 MI.' THEN, AS OUR HDG PASSED 020 DEGS, 12 O'CLOCK, 6 1/2 MI -- PAUSE, 7 MI HE'S MOVING AWAY! AS WE PASSED 350 DEGS THE CTR TOLD US TO TURN R AND PROCEED ON COURSE. HE THEN DEMANDED OF THE MLT WHAT RIGHT HE HAD TO DEVIATE AS HE DID WITHOUT PERMISSION. HE INSTRUCTED THE MLT TO CALL A CERTAIN TELEPHONE NUMBER DUE TO ACTIVATION OF THE CTR PROX WARNING SYS ETC. THERE WAS A SHIFT CHANGE THEN AND THE NEW CTLR GAVE ME THE SUPVR'S PHONE NUMBER WHICH I CALLED. HE TOLD ME ALL THE VOICE AND RADAR TAPES HAD BEEN PULLED FOR INVESTIGATION.
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.