 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Flight crew of an LR35 recover from a heading deviation during GPS programmed approach procedure. Reporter cites a failure of either the GPS in the flight plan mode or a failure of the interfacing with the database programmed heading.
| Attributes | |
| ACN | 377881 |
| Time | |
| Date | 199708 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : msp |
| State Reference | MN |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : msp |
| Operator | common carrier : air carrier |
| Make Model Name | Learjet 35 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other |
| Flight Phase | descent : approach |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 90 flight time total : 9200 flight time type : 4500 |
| ASRS Report | 377881 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : became reoriented flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
The flying captain was using the autoplt coupled to the universal GNS-xls GPS. The GPS was set up in flight plan mode using the stored arrival to msp. The last segment of the arrival is a 300 degree heading. The GPS program neglected this heading and proceeded direct msp. The captain noticed the deviation and returned to the correct heading. By this time approach noticed the deviation. There were no conflicts. During this incident, I was heads down reviewing the approach. Caution must be used when stored databases are being used.
Original NASA ASRS Text
Title: FLC OF AN LR35 RECOVER FROM A HDG DEV DURING GPS PROGRAMMED APCH PROC. RPTR CITES A FAILURE OF EITHER THE GPS IN THE FLT PLAN MODE OR A FAILURE OF THE INTERFACING WITH THE DATABASE PROGRAMMED HDG.
Narrative: THE FLYING CAPT WAS USING THE AUTOPLT COUPLED TO THE UNIVERSAL GNS-XLS GPS. THE GPS WAS SET UP IN FLT PLAN MODE USING THE STORED ARR TO MSP. THE LAST SEGMENT OF THE ARR IS A 300 DEG HDG. THE GPS PROGRAM NEGLECTED THIS HDG AND PROCEEDED DIRECT MSP. THE CAPT NOTICED THE DEV AND RETURNED TO THE CORRECT HDG. BY THIS TIME APCH NOTICED THE DEV. THERE WERE NO CONFLICTS. DURING THIS INCIDENT, I WAS HEADS DOWN REVIEWING THE APCH. CAUTION MUST BE USED WHEN STORED DATABASES ARE BEING USED.
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.