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During an arrival route, ATC intervened to instruct medium large transport to level off in their descent due to a flight of military F15 aircraft. The military aircraft ended up below and above their aircraft causing less than standard separation.
| Attributes | |
| ACN | 280148 |
| Time | |
| Date | 199408 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : rdu |
| State Reference | NC |
| Altitude | msl bound lower : 12700 msl bound upper : 12700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Eagle (F-15) |
| Operating Under FAR Part | other : other |
| Navigation In Use | Other Other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 10000 flight time type : 2500 |
| ASRS Report | 280148 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : far non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 750 vertical : 800 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were cleared on the argal arrival to cross argal at 10000 ft/250 KIAS. During the descent ATC advised traffic (flight of F15's) VFR at 11500 ft and suggested we stop descent at 12000 ft. Passing 14000 or so we acquired the TCASII contact and then saw an F-15 below us. Later we saw another F15 above us (our altitude was 12700 ft descending). We had no TCASII warning nor did we take evasive action. I suggest that all aircraft in a VFR formation squawk. The formation leader tell ATC of a block VFR altitude to eliminate ending up in the middle of them.
Original NASA ASRS Text
Title: DURING AN ARR RTE, ATC INTERVENED TO INSTRUCT MLG TO LEVEL OFF IN THEIR DSCNT DUE TO A FLT OF MIL F15 ACFT. THE MIL ACFT ENDED UP BELOW AND ABOVE THEIR ACFT CAUSING LTSS.
Narrative: WE WERE CLRED ON THE ARGAL ARR TO CROSS ARGAL AT 10000 FT/250 KIAS. DURING THE DSCNT ATC ADVISED TFC (FLT OF F15'S) VFR AT 11500 FT AND SUGGESTED WE STOP DSCNT AT 12000 FT. PASSING 14000 OR SO WE ACQUIRED THE TCASII CONTACT AND THEN SAW AN F-15 BELOW US. LATER WE SAW ANOTHER F15 ABOVE US (OUR ALT WAS 12700 FT DSNDING). WE HAD NO TCASII WARNING NOR DID WE TAKE EVASIVE ACTION. I SUGGEST THAT ALL ACFT IN A VFR FORMATION SQUAWK. THE FORMATION LEADER TELL ATC OF A BLOCK VFR ALT TO ELIMINATE ENDING UP IN THE MIDDLE OF THEM.
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.