 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Corp pilot flying a lear 31 missets GPS fix and almost misses crossing restr. Center controller catches the error and requests a 360 degree turn to descend to the assigned altitude.
| Attributes | |
| ACN | 335296 |
| Time | |
| Date | 199605 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mht |
| State Reference | NH |
| Altitude | msl bound lower : 9000 msl bound upper : 30000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw tower : dtw |
| Operator | general aviation : corporate |
| Make Model Name | Learjet 31 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : cfi pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 210 flight time total : 8000 flight time type : 700 |
| ASRS Report | 335296 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met non adherence : far non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were told to cross 25 mi southwest of mht at 9000 ft MSL. We were navigating by GPS and backup VOR. The GPS still said we were 85-90 mi from mht. Center advised us that we were 25 mi out and we would have to do a 360 degree turn to make the crossing because we were still at 30000 ft. We made the turn and made the crossing restr. We still do not know why the GPS gave us that we were 85 mi out. We were navigating to keene VOR then mht. The 3 letter identify for keene is een. There is another VOR in the area that has an identify ene which is on the northeast side of mht. It is possible I could have put ene in the GPS instead of een. I don't think it is a good idea to have two vors that close with such close idents since so much of the new equipment we have you have to put in the 3 letter identify. It looked like we were on course because we were going exactly right for the course. Callback conversation with reporter revealed the following information: reporter aircraft was a lear 31 and he stated that if the controller had not caught the error they would have remained at altitude and missed the crossing restr. They were about 5 mi from the crossing fix when ATC contacted them. They did determine that the wrong VOR had been entered into the GPS. This was new equipment and different from their previous equipment. It was a learning process on this trip. They learned!!
Original NASA ASRS Text
Title: CORP PLT FLYING A LEAR 31 MISSETS GPS FIX AND ALMOST MISSES XING RESTR. CTR CTLR CATCHES THE ERROR AND REQUESTS A 360 DEG TURN TO DSND TO THE ASSIGNED ALT.
Narrative: WE WERE TOLD TO CROSS 25 MI SW OF MHT AT 9000 FT MSL. WE WERE NAVING BY GPS AND BACKUP VOR. THE GPS STILL SAID WE WERE 85-90 MI FROM MHT. CTR ADVISED US THAT WE WERE 25 MI OUT AND WE WOULD HAVE TO DO A 360 DEG TURN TO MAKE THE XING BECAUSE WE WERE STILL AT 30000 FT. WE MADE THE TURN AND MADE THE XING RESTR. WE STILL DO NOT KNOW WHY THE GPS GAVE US THAT WE WERE 85 MI OUT. WE WERE NAVING TO KEENE VOR THEN MHT. THE 3 LETTER IDENT FOR KEENE IS EEN. THERE IS ANOTHER VOR IN THE AREA THAT HAS AN IDENT ENE WHICH IS ON THE NE SIDE OF MHT. IT IS POSSIBLE I COULD HAVE PUT ENE IN THE GPS INSTEAD OF EEN. I DON'T THINK IT IS A GOOD IDEA TO HAVE TWO VORS THAT CLOSE WITH SUCH CLOSE IDENTS SINCE SO MUCH OF THE NEW EQUIP WE HAVE YOU HAVE TO PUT IN THE 3 LETTER IDENT. IT LOOKED LIKE WE WERE ON COURSE BECAUSE WE WERE GOING EXACTLY RIGHT FOR THE COURSE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR ACFT WAS A LEAR 31 AND HE STATED THAT IF THE CTLR HAD NOT CAUGHT THE ERROR THEY WOULD HAVE REMAINED AT ALT AND MISSED THE XING RESTR. THEY WERE ABOUT 5 MI FROM THE XING FIX WHEN ATC CONTACTED THEM. THEY DID DETERMINE THAT THE WRONG VOR HAD BEEN ENTERED INTO THE GPS. THIS WAS NEW EQUIP AND DIFFERENT FROM THEIR PREVIOUS EQUIP. IT WAS A LEARNING PROCESS ON THIS TRIP. THEY LEARNED!!
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.