 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Advanced cockpit air carrier medium large transport flight crew experiences track deviation and erroneous heading information.
| Attributes | |
| ACN | 149859 |
| Time | |
| Date | 199006 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mxe airport : phl |
| State Reference | PA |
| Altitude | msl bound lower : 6000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : phl |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 60 flight time total : 11150 flight time type : 250 |
| ASRS Report | 149859 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | non adherence : clearance other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Our clearance after contacting departure from phl was climb to 10000', upon leaving 2000' turn right direct modena VOR, (departed taxiway 27L). Modena 113.2 was set in both navigation heads. Out of 2000' a right turn toward the VOR was initiated. The copilot selected navigation position on his IRS mode selector and I initialized direct to modena on the legs page. Everything lined up and I then switched my IRS mode selector to navigation and turned my attention outside to check for traffic. Passing 6000', departure asked for our heading. We were on a 305 degree course and according to the IRS, proceeding direct to modena. We were informed modena was 265 degree, a 40 degree difference. I immediately switched back to VOR/ILS on the IRS mode selector and the controller was correct. We continued flight in VOR/ILS mode. There was supposedly no conflict with traffic. I wrote IRS up upon arrival in pit.
Original NASA ASRS Text
Title: ADVANCED COCKPIT ACR MLG FLT CREW EXPERIENCES TRACK DEVIATION AND ERRONEOUS HEADING INFORMATION.
Narrative: OUR CLRNC AFTER CONTACTING DEP FROM PHL WAS CLB TO 10000', UPON LEAVING 2000' TURN R DIRECT MODENA VOR, (DEPARTED TXWY 27L). MODENA 113.2 WAS SET IN BOTH NAV HEADS. OUT OF 2000' A R TURN TOWARD THE VOR WAS INITIATED. THE COPLT SELECTED NAV POS ON HIS IRS MODE SELECTOR AND I INITIALIZED DIRECT TO MODENA ON THE LEGS PAGE. EVERYTHING LINED UP AND I THEN SWITCHED MY IRS MODE SELECTOR TO NAV AND TURNED MY ATTN OUTSIDE TO CHK FOR TFC. PASSING 6000', DEP ASKED FOR OUR HDG. WE WERE ON A 305 DEG COURSE AND ACCORDING TO THE IRS, PROCEEDING DIRECT TO MODENA. WE WERE INFORMED MODENA WAS 265 DEG, A 40 DEG DIFFERENCE. I IMMEDIATELY SWITCHED BACK TO VOR/ILS ON THE IRS MODE SELECTOR AND THE CTLR WAS CORRECT. WE CONTINUED FLT IN VOR/ILS MODE. THERE WAS SUPPOSEDLY NO CONFLICT WITH TFC. I WROTE IRS UP UPON ARR IN PIT.
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.