 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Pilot of SF3 reports that localizer signal for runway 13 ILS IAP displaces to the left of the runway edge at or near decision altitude.
| Attributes | |
| ACN | 609775 |
| Time | |
| Date | 200402 |
| Day | Mon |
| Place | |
| Locale Reference | airport : ggg.airport |
| State Reference | TX |
| Altitude | msl bound lower : 365 msl bound upper : 920 |
| Aircraft 1 | |
| Controlling Facilities | tower : ggg.tower |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340B |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 13 |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 609775 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Navigational Facility ATC Facility ATC Human Performance Airport FAA |
| Primary Problem | Navigational Facility |
Narrative:
On numerous approachs in IMC to GGG ILS runway 13, inside a 1/4 mile, just inside the highway, the ILS localizer guides the aircraft left of center line, past the left edge of the runway. I have always discontinued use of the autopilot at this point so I do not know how far it will take you. I have made numerous reports to GGG tower, it still continues. This occurs in different aircraft. Callback conversation with reporter revealed the following information: reporter advises that the runway in question is runway 13. There is no ILS approach to 31. He stressed the fact that the misalignment occurs just prior to decision altitude and if followed closely, as with an automatic coupled approach, which is mandated by his air carrier, results in the aircraft being left of the runway edge at a critical phase of flight. Reporter stated that he is aware of this anomaly being reported to the local tower several times. He further stated that his reports to his air carrier resulted in the response that GGG had received no complaints.
Original NASA ASRS Text
Title: PLT OF SF3 RPTS THAT LOCALIZER SIGNAL FOR RWY 13 ILS IAP DISPLACES TO THE L OF THE RWY EDGE AT OR NEAR DECISION ALT.
Narrative: ON NUMEROUS APCHS IN IMC TO GGG ILS RWY 13, INSIDE A 1/4 MILE, JUST INSIDE THE HIGHWAY, THE ILS LOCALIZER GUIDES THE ACFT L OF CENTER LINE, PAST THE L EDGE OF THE RWY. I HAVE ALWAYS DISCONTINUED USE OF THE AUTOPILOT AT THIS POINT SO I DO NOT KNOW HOW FAR IT WILL TAKE YOU. I HAVE MADE NUMEROUS RPTS TO GGG TWR, IT STILL CONTINUES. THIS OCCURS IN DIFFERENT ACFT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR ADVISES THAT THE RWY IN QUESTION IS RWY 13. THERE IS NO ILS APCH TO 31. HE STRESSED THE FACT THAT THE MISALIGNMENT OCCURS JUST PRIOR TO DECISION ALT AND IF FOLLOWED CLOSELY, AS WITH AN AUTO COUPLED APCH, WHICH IS MANDATED BY HIS ACR, RESULTS IN THE ACFT BEING L OF THE RWY EDGE AT A CRITICAL PHASE OF FLT. RPTR STATED THAT HE IS AWARE OF THIS ANOMALY BEING RPTED TO THE LOCAL TWR SEVERAL TIMES. HE FURTHER STATED THAT HIS RPTS TO HIS ACR RESULTED IN THE RESPONSE THAT GGG HAD RECEIVED NO COMPLAINTS.
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.