 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Both ILS receivers on an air carrier medium large transport failed to align themselves properly. The TRACON approach controller intervened.
| Attributes | |
| ACN | 355339 |
| Time | |
| Date | 199612 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : mem |
| State Reference | TN |
| Altitude | msl bound lower : 3000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mem |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : sdu |
| Flight Phase | descent : approach |
| Route In Use | approach : straight in enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 22000 flight time type : 13000 |
| ASRS Report | 355339 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | aircraft : equipment problem dissipated other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
| Situations | |
| Navigational Aid | Unspecified |
Narrative:
On vectors to ILS runway 18C mem. Descended to 3000 ft and given 210 degree heading to intercept and cleared to runway 18C, ILS approach. First officer and captain tuned to 108.3 runway 18C ILS frequency. First officer localizer showed slight right correction to localizer intercept, captain showed larger correction when approach called and said we were right of course. Captain re-channeled navigation radio and correction jumped left as suggested by approach. First officer radio also corrected left about that time. Rest of approach normal, but wrote up ILS functions of navigation receivers. Maintenance said aircraft showed no history, but other aircraft had complained of localizer problems on runway 18C and they suspected construction equipment work on runway 18L new runway. (Sent air safety report.)
Original NASA ASRS Text
Title: BOTH ILS RECEIVERS ON AN ACR MLG FAILED TO ALIGN THEMSELVES PROPERLY. THE TRACON APCH CTLR INTERVENED.
Narrative: ON VECTORS TO ILS RWY 18C MEM. DSNDED TO 3000 FT AND GIVEN 210 DEG HDG TO INTERCEPT AND CLRED TO RWY 18C, ILS APCH. FO AND CAPT TUNED TO 108.3 RWY 18C ILS FREQ. FO LOC SHOWED SLIGHT R CORRECTION TO LOC INTERCEPT, CAPT SHOWED LARGER CORRECTION WHEN APCH CALLED AND SAID WE WERE R OF COURSE. CAPT RE-CHANNELED NAV RADIO AND CORRECTION JUMPED L AS SUGGESTED BY APCH. FO RADIO ALSO CORRECTED L ABOUT THAT TIME. REST OF APCH NORMAL, BUT WROTE UP ILS FUNCTIONS OF NAV RECEIVERS. MAINT SAID ACFT SHOWED NO HISTORY, BUT OTHER ACFT HAD COMPLAINED OF LOC PROBS ON RWY 18C AND THEY SUSPECTED CONSTRUCTION EQUIP WORK ON RWY 18L NEW RWY. (SENT AIR SAFETY RPT.)
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.