 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Pilot reporter questions the impact of a ground vehicle traffic blocking the transmission of the ILS course inside the runway threshold and the aircraft operating procedure that should be associated with that situation.
| Attributes | |
| ACN | 205088 |
| Time | |
| Date | 199203 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ont |
| State Reference | CA |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | ils localizer & glide slope : ont Other Other |
| Flight Phase | descent : approach landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 260 flight time total : 12000 flight time type : 10000 |
| ASRS Report | 205088 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Airport |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | other physical facility procedure or policy : unspecified |
| Airport | other physical facility |
Narrative:
We were airlines flight phx-ont on fri/mar/92, in an medium large transport with 137 passenger. It was a confusing situation as to ... Does the ILS work and operable or is it not. Ont runway 26R closed, runway 26L ILS not usable inside runway threshold. We delay our departure from phx because we were told that a cement truck was blocking the ILS antenna. We launched after being advised the cement truck difficulty was taken care of. The ATIS ont upon arrival stated that 'aircraft could not make coupled approachs to 26L.' the WX improved to a 4500 RVR and we were able to make the approach and land safely. My misunderstanding is ... What impact does 'localizer unusable inside runway threshold' have on CAT I/ii approachs when RVR 18 or 24 is needed?
Original NASA ASRS Text
Title: PLT RPTR QUESTIONS THE IMPACT OF A GND VEHICLE TFC BLOCKING THE TRANSMISSION OF THE ILS COURSE INSIDE THE RWY THRESHOLD AND THE ACFT OPERATING PROC THAT SHOULD BE ASSOCIATED WITH THAT SITUATION.
Narrative: WE WERE AIRLINES FLT PHX-ONT ON FRI/MAR/92, IN AN MLG WITH 137 PAX. IT WAS A CONFUSING SITUATION AS TO ... DOES THE ILS WORK AND OPERABLE OR IS IT NOT. ONT RWY 26R CLOSED, RWY 26L ILS NOT USABLE INSIDE RWY THRESHOLD. WE DELAY OUR DEP FROM PHX BECAUSE WE WERE TOLD THAT A CEMENT TRUCK WAS BLOCKING THE ILS ANTENNA. WE LAUNCHED AFTER BEING ADVISED THE CEMENT TRUCK DIFFICULTY WAS TAKEN CARE OF. THE ATIS ONT UPON ARR STATED THAT 'ACFT COULD NOT MAKE COUPLED APCHS TO 26L.' THE WX IMPROVED TO A 4500 RVR AND WE WERE ABLE TO MAKE THE APCH AND LAND SAFELY. MY MISUNDERSTANDING IS ... WHAT IMPACT DOES 'LOC UNUSABLE INSIDE RWY THRESHOLD' HAVE ON CAT I/II APCHS WHEN RVR 18 OR 24 IS NEEDED?
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.