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NAVAID problem allegedly created by passenger use of hand held cellular telephones on IAP ILS approach.
| Attributes | |
| ACN | 200510 |
| Time | |
| Date | 199202 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : hou |
| State Reference | TX |
| Altitude | msl bound lower : 1500 msl bound upper : 1500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : hou |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | ils localizer & glide slope : hou Other Other |
| Flight Phase | descent : approach ground : preflight |
| Route In Use | approach : straight in |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 280 flight time total : 7500 flight time type : 230 |
| ASRS Report | 200510 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Inbound ILS runway 4 at houston. At the OM, captain and first officer ILS (localizer and GS) needles fluctuated in opposite directions (1 1/2 dots). Tower called us drifting to the north of the localizer. First officer made PA to 'secure hand held telephones.' first officer switched to VOR which showed on course to field and above MDA. 10-15 seconds after PA, captain's ILS needles returned to normal. Uneventful landing made at houston.
Original NASA ASRS Text
Title: NAVAID PROBLEM ALLEGEDLY CREATED BY PAX USE OF HAND HELD CELLULAR TELEPHONES ON IAP ILS APCH.
Narrative: INBOUND ILS RWY 4 AT HOUSTON. AT THE OM, CAPT AND FO ILS (LOC AND GS) NEEDLES FLUCTUATED IN OPPOSITE DIRECTIONS (1 1/2 DOTS). TWR CALLED US DRIFTING TO THE N OF THE LOC. FO MADE PA TO 'SECURE HAND HELD TELEPHONES.' FO SWITCHED TO VOR WHICH SHOWED ON COURSE TO FIELD AND ABOVE MDA. 10-15 SECONDS AFTER PA, CAPT'S ILS NEEDLES RETURNED TO NORMAL. UNEVENTFUL LNDG MADE AT HOUSTON.
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.