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Flight cleared to cross sln at FL350. Miscalculated mileage to sln. Controller intervened, crossing was accomplished.
| Attributes | |
| ACN | 111397 |
| Time | |
| Date | 198905 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : sln |
| State Reference | KS |
| Altitude | msl bound lower : 33000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 14600 flight time type : 3000 |
| ASRS Report | 111397 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Chart Or Publication |
| Air Traffic Incident | other |
Narrative:
Flight established FL330 (chop at FL310 and too heavy for FL350) tracking outbnd on J18 between stj and sln (stj 236 degree right). Controller told us to cross sln FL350. We acknowledged and relaxed. When my stj reading (DME) was indicating about halfway between the 2 facs, the controller asked if we had received the crossing clearance. We confirmed that we had. We had started to look up the inbound bearing frequency, etc, for sln, but were interrupted with, '...climb now to FL350!' of course we immediately complied with the clearance. After leveling FL350 we had time to sort things out. One side of the chart shows the distance between stj and sln as 240. The other side (hi 1) shows 141. (I was using the hi 2 side). I thought that over 100 mi remained. We made our crossing only because of the controller's alertness and assertiveness! Note: I can see one error happening on the map, but 2? If you add the individual DME distances, you get 140, not 141.
Original NASA ASRS Text
Title: FLT CLEARED TO CROSS SLN AT FL350. MISCALCULATED MILEAGE TO SLN. CTLR INTERVENED, CROSSING WAS ACCOMPLISHED.
Narrative: FLT ESTABLISHED FL330 (CHOP AT FL310 AND TOO HEAVY FOR FL350) TRACKING OUTBND ON J18 BTWN STJ AND SLN (STJ 236 DEG R). CTLR TOLD US TO CROSS SLN FL350. WE ACKNOWLEDGED AND RELAXED. WHEN MY STJ READING (DME) WAS INDICATING ABOUT HALFWAY BTWN THE 2 FACS, THE CTLR ASKED IF WE HAD RECEIVED THE XING CLRNC. WE CONFIRMED THAT WE HAD. WE HAD STARTED TO LOOK UP THE INBND BEARING FREQ, ETC, FOR SLN, BUT WERE INTERRUPTED WITH, '...CLB NOW TO FL350!' OF COURSE WE IMMEDIATELY COMPLIED WITH THE CLRNC. AFTER LEVELING FL350 WE HAD TIME TO SORT THINGS OUT. ONE SIDE OF THE CHART SHOWS THE DISTANCE BTWN STJ AND SLN AS 240. THE OTHER SIDE (HI 1) SHOWS 141. (I WAS USING THE HI 2 SIDE). I THOUGHT THAT OVER 100 MI REMAINED. WE MADE OUR XING ONLY BECAUSE OF THE CTLR'S ALERTNESS AND ASSERTIVENESS! NOTE: I CAN SEE ONE ERROR HAPPENING ON THE MAP, BUT 2? IF YOU ADD THE INDIVIDUAL DME DISTANCES, YOU GET 140, NOT 141.
Data retrieved from NASA's ASRS site as of August 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.