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Military Y climb through occupied altitude had less than standard separation from small aircraft X. System error.
| Attributes | |
| ACN | 244837 |
| Time | |
| Date | 199306 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : omn |
| State Reference | FL |
| Altitude | msl bound lower : 7000 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other |
| Route In Use | enroute : direct enroute airway : jax |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Experimental |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 20000 flight time type : 40 |
| ASRS Report | 244837 |
| Person 2 | |
| Affiliation | government : military |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : military |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 1500 vertical : 300 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Small aircraft X northbound V-3 at 7000 working jax approach on 118.0. Jax approach had stated he was not receiving my 'mode C' -- I acknowledged. Next saw military Y climbing southeast towards me. As it appeared a collision was possible, I dropped 300 ft to 6700 -- military Y passed above and slightly behind me. Returned to 7000 and continued flight. On call back to controller, was told military Y had been cleared from 6000 to 8000. Military Y was on UHF, so did not hear his comments, but from ATC talk, realized he had asked also. ATC told military Y he had 'lost' my transponder, etc. He apologized to military Y. Believe ATC forgot about us when he lost the transponder return. On arrival at destination, had transponder and encoder removed and checked! All checked out normal by licensed avionics repair station! (No problem was discovered -- all worked normal on return flight.) supplemental information from acn 244886: no mode C small aircraft X northbound at 7000 ft. Military Y southeast bound at 7000 ft.
Original NASA ASRS Text
Title: MIL Y CLB THROUGH OCCUPIED ALT HAD LTSS FROM SMA X. SYS ERROR.
Narrative: SMA X NBOUND V-3 AT 7000 WORKING JAX APCH ON 118.0. JAX APCH HAD STATED HE WAS NOT RECEIVING MY 'MODE C' -- I ACKNOWLEDGED. NEXT SAW MIL Y CLBING SE TOWARDS ME. AS IT APPEARED A COLLISION WAS POSSIBLE, I DROPPED 300 FT TO 6700 -- MIL Y PASSED ABOVE AND SLIGHTLY BEHIND ME. RETURNED TO 7000 AND CONTINUED FLT. ON CALL BACK TO CTLR, WAS TOLD MIL Y HAD BEEN CLRED FROM 6000 TO 8000. MIL Y WAS ON UHF, SO DID NOT HEAR HIS COMMENTS, BUT FROM ATC TALK, REALIZED HE HAD ASKED ALSO. ATC TOLD MIL Y HE HAD 'LOST' MY XPONDER, ETC. HE APOLOGIZED TO MIL Y. BELIEVE ATC FORGOT ABOUT US WHEN HE LOST THE XPONDER RETURN. ON ARR AT DEST, HAD XPONDER AND ENCODER REMOVED AND CHKED! ALL CHKED OUT NORMAL BY LICENSED AVIONICS REPAIR STATION! (NO PROB WAS DISCOVERED -- ALL WORKED NORMAL ON RETURN FLT.) SUPPLEMENTAL INFO FROM ACN 244886: NO MODE C SMA X NBOUND AT 7000 FT. MIL Y SE BOUND AT 7000 FT.
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.