 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Military X descent to occupied altitude had less than standard separation with air carrier Y. System error.
| Attributes | |
| ACN | 215496 |
| Time | |
| Date | 199207 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : phx |
| State Reference | AZ |
| Altitude | msl bound lower : 35000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zab |
| Operator | other |
| Make Model Name | Fighter |
| Flight Phase | cruise other descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| 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 : 1 |
| ASRS Report | 215496 |
| Person 2 | |
| Affiliation | government : military |
| Function | flight crew : single pilot |
| Qualification | pilot : military |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 27000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Military X flight of 2 fgt's inbound to iwa. Sector 80 controller advised military X at FL390 was on a heading to separate him from air carrier Y at FL350 bound for lax. Military X then checked on and was given clearance to deviation south for WX. I coordinated a lower altitude with sector 91, they approved FL240 reference traffic at FL310. I instructed military X to descend to FL240 and expedite through FL290. I then realized there was traffic at FL330. I then instructed military X to maintain FL350, there was no response. I tried again, and then on guard twice before flight acknowledged clearance. I attempted to provide lateral separation with a 30 degree right turn on military X and 30 degree left turn on air carrier Y. I gave military X an additional 30 degree right turn which he took, advising me it would put him into WX.
Original NASA ASRS Text
Title: MIL X DSCNT TO OCCUPIED ALT HAD LTSS WITH ACR Y. SYS ERROR.
Narrative: MIL X FLT OF 2 FGT'S INBOUND TO IWA. SECTOR 80 CTLR ADVISED MIL X AT FL390 WAS ON A HDG TO SEPARATE HIM FROM ACR Y AT FL350 BOUND FOR LAX. MIL X THEN CHKED ON AND WAS GIVEN CLRNC TO DEV S FOR WX. I COORDINATED A LOWER ALT WITH SECTOR 91, THEY APPROVED FL240 REF TFC AT FL310. I INSTRUCTED MIL X TO DSND TO FL240 AND EXPEDITE THROUGH FL290. I THEN REALIZED THERE WAS TFC AT FL330. I THEN INSTRUCTED MIL X TO MAINTAIN FL350, THERE WAS NO RESPONSE. I TRIED AGAIN, AND THEN ON GUARD TWICE BEFORE FLT ACKNOWLEDGED CLRNC. I ATTEMPTED TO PROVIDE LATERAL SEPARATION WITH A 30 DEG R TURN ON MIL X AND 30 DEG L TURN ON ACR Y. I GAVE MIL X AN ADDITIONAL 30 DEG R TURN WHICH HE TOOK, ADVISING ME IT WOULD PUT HIM INTO WX.
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.