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Flight crew of a lear 25 failed to make STAR crossing restr due to first officer using time and distance calculation rather than GPS navigation guidance.
| Attributes | |
| ACN | 429040 |
| Time | |
| Date | 199902 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | intersection : holey |
| State Reference | NJ |
| Altitude | msl single value : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90.tracon |
| Operator | common carrier : air taxi |
| Make Model Name | Learjet 25 |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | other vortac |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : eno.rbv1 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : multi engine |
| Experience | flight time last 90 days : 140 flight time total : 1940 flight time type : 17 |
| ASRS Report | 429040 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued alert |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We had been given clearance to cross holey at 11000 ft. The captain (PNF) was running the navigation equipment. He had entered holey in the GPS, which is in the pedestal between the seats, and set rbv in the VOR/DME navs. I misunderstood the location of the crossing restr and was using the distance and time to rbv for the descent. When ATC said 'you missed that one by a mi,' I realized what I had done and we descended with spoilers extended directly to 8000 ft as instructed. This was my first operational flight, and thankfully we did not have passenger. This emphasized to me the importance of knowing what navigation information is displayed where and verifying verbally with the PNF that I am using the correct information for descent planning. The PNF had everything set up properly, I just used the wrong time to fix information by using the rbv DME information on the panel instead of using the GPS data between the seats. In the future, I plan to verbally confirm with the PNF that I am descending to cross 'X' intersection as set in the GPS with 'Y' mins to go. This will prevent this type of error from happening by verbally communicating to him that I am using the correct data for my descent.
Original NASA ASRS Text
Title: FLC OF A LEAR 25 FAILED TO MAKE STAR XING RESTR DUE TO FO USING TIME AND DISTANCE CALCULATION RATHER THAN GPS NAV GUIDANCE.
Narrative: WE HAD BEEN GIVEN CLRNC TO CROSS HOLEY AT 11000 FT. THE CAPT (PNF) WAS RUNNING THE NAV EQUIP. HE HAD ENTERED HOLEY IN THE GPS, WHICH IS IN THE PEDESTAL BTWN THE SEATS, AND SET RBV IN THE VOR/DME NAVS. I MISUNDERSTOOD THE LOCATION OF THE XING RESTR AND WAS USING THE DISTANCE AND TIME TO RBV FOR THE DSCNT. WHEN ATC SAID 'YOU MISSED THAT ONE BY A MI,' I REALIZED WHAT I HAD DONE AND WE DSNDED WITH SPOILERS EXTENDED DIRECTLY TO 8000 FT AS INSTRUCTED. THIS WAS MY FIRST OPERATIONAL FLT, AND THANKFULLY WE DID NOT HAVE PAX. THIS EMPHASIZED TO ME THE IMPORTANCE OF KNOWING WHAT NAV INFO IS DISPLAYED WHERE AND VERIFYING VERBALLY WITH THE PNF THAT I AM USING THE CORRECT INFO FOR DSCNT PLANNING. THE PNF HAD EVERYTHING SET UP PROPERLY, I JUST USED THE WRONG TIME TO FIX INFO BY USING THE RBV DME INFO ON THE PANEL INSTEAD OF USING THE GPS DATA BTWN THE SEATS. IN THE FUTURE, I PLAN TO VERBALLY CONFIRM WITH THE PNF THAT I AM DSNDING TO CROSS 'X' INTXN AS SET IN THE GPS WITH 'Y' MINS TO GO. THIS WILL PREVENT THIS TYPE OF ERROR FROM HAPPENING BY VERBALLY COMMUNICATING TO HIM THAT I AM USING THE CORRECT DATA FOR MY DSCNT.
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.