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|
Attributes | |
ACN | 221598 |
Time | |
Date | 199209 |
Day | Wed |
Local Time Of Day | 1801 To 2400 |
Place | |
Locale Reference | atc facility : slc |
State Reference | UT |
Altitude | msl bound lower : 24000 msl bound upper : 24500 |
Environment | |
Flight Conditions | VMC |
Light | Dusk |
Aircraft 1 | |
Controlling Facilities | artcc : zlc military facility : vttr |
Operator | other |
Make Model Name | Military Transport |
Navigation In Use | Other |
Flight Phase | cruise other cruise other |
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 : military |
Function | flight crew : captain oversight : pic |
Qualification | pilot : atp pilot : cfi pilot : commercial pilot : military |
Experience | flight time last 90 days : 50 flight time total : 1850 flight time type : 1100 |
ASRS Report | 221598 |
Person 2 | |
Affiliation | government : military |
Function | flight crew : first officer |
Qualification | pilot : military |
Events | |
Anomaly | conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other other anomaly other other spatial deviation |
Independent Detector | other flight crewa other other : unspecified |
Resolutory Action | none taken : unable |
Consequence | faa : investigated |
Miss Distance | horizontal : 12000 vertical : 500 |
Supplementary | |
Primary Problem | Flight Crew Human Performance |
Air Traffic Incident | Pilot Deviation |
Narrative:
We were the lead of a 2 ship formation. The second aircraft was at FL245 (lead was at FL240). As we approached our turn point on the north corner of the uttr test range, we passed through a cloud and picked up some icing. We turned to the northwest to exit the WX since the accumulation rate increased. Once we entered the clear our radar painted moisture towards the northeast. Visually, we determined this to be multiple thunderstorms. We advised clover control that we were deviating for thunderstorms, and would start our turn towards the south when we could. Soon after, we started our turn and advised him. Clover advised us we were north of the area and we told him we were correcting back, while avoiding WX. No mention of any traffic was made to us. A min later, our second aircraft was advised of traffic and told to descend to FL240. Because he was in and out of the WX, he told clover 'unable,' and shortly afterwards declared an emergency. After rollout, each aircraft was given separate clrncs out of the area. The thunderstorms prevented us from turning as planned. While clover separates military aircraft, he is not an FAA controller. Likewise, he didn't advise salt lake center of our WX problems. We should have declared an emergency before we exited the area (we thought clover was a controling agency). One other option would have been to request FL230 versus FL240 and descend 1000 ft. This would have given our second aircraft the proper spacing. Salt lake center had an aircraft 2 mi away at FL250 which our second aircraft was in conflict with.
Original NASA ASRS Text
Title: POTENTIAL CONFLICT WITH LTSS BTWN 2 MIL BMB AND AN ACR MLG.
Narrative: WE WERE THE LEAD OF A 2 SHIP FORMATION. THE SECOND ACFT WAS AT FL245 (LEAD WAS AT FL240). AS WE APCHED OUR TURN POINT ON THE N CORNER OF THE UTTR TEST RANGE, WE PASSED THROUGH A CLOUD AND PICKED UP SOME ICING. WE TURNED TO THE NW TO EXIT THE WX SINCE THE ACCUMULATION RATE INCREASED. ONCE WE ENTERED THE CLR OUR RADAR PAINTED MOISTURE TOWARDS THE NE. VISUALLY, WE DETERMINED THIS TO BE MULTIPLE TSTMS. WE ADVISED CLOVER CTL THAT WE WERE DEVIATING FOR TSTMS, AND WOULD START OUR TURN TOWARDS THE S WHEN WE COULD. SOON AFTER, WE STARTED OUR TURN AND ADVISED HIM. CLOVER ADVISED US WE WERE N OF THE AREA AND WE TOLD HIM WE WERE CORRECTING BACK, WHILE AVOIDING WX. NO MENTION OF ANY TFC WAS MADE TO US. A MIN LATER, OUR SECOND ACFT WAS ADVISED OF TFC AND TOLD TO DSND TO FL240. BECAUSE HE WAS IN AND OUT OF THE WX, HE TOLD CLOVER 'UNABLE,' AND SHORTLY AFTERWARDS DECLARED AN EMER. AFTER ROLLOUT, EACH ACFT WAS GIVEN SEPARATE CLRNCS OUT OF THE AREA. THE TSTMS PREVENTED US FROM TURNING AS PLANNED. WHILE CLOVER SEPARATES MIL ACFT, HE IS NOT AN FAA CTLR. LIKEWISE, HE DIDN'T ADVISE SALT LAKE CTR OF OUR WX PROBLEMS. WE SHOULD HAVE DECLARED AN EMER BEFORE WE EXITED THE AREA (WE THOUGHT CLOVER WAS A CTLING AGENCY). ONE OTHER OPTION WOULD HAVE BEEN TO REQUEST FL230 VERSUS FL240 AND DSND 1000 FT. THIS WOULD HAVE GIVEN OUR SECOND ACFT THE PROPER SPACING. SALT LAKE CTR HAD AN ACFT 2 MI AWAY AT FL250 WHICH OUR SECOND ACFT WAS IN CONFLICT WITH.
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.