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Flight crew of air carrier light transport aircraft had a false terrain warning at the beginning of an approach at the 15 DME location.
| Attributes | |
| ACN | 219996 |
| Time | |
| Date | 199208 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : cle |
| State Reference | OH |
| Altitude | msl bound lower : 5000 msl bound upper : 5500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : cle |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | descent : approach descent other |
| Route In Use | approach : straight in |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 10 flight time total : 4500 flight time type : 1000 |
| ASRS Report | 219996 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance non adherence : published procedure other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Approaching cleveland on the 23 localizer. Approximately 15 DME after being cleared for the approach, the terrain warning sounded. At this time we were in heavy rain, moderate turbulence and could see breaks in the clouds below. I told first officer to climb until the warning stopped. The warning stopped around 5500 ft. I was looking out the left side to see if an airplane was under us. We then continued the approach and landed as scheduled in cleveland. We were not sure if the warning was an aircraft under us or if the heavy rain may have caused a faulty warning. I did not contact approach to tell them of the momentary altitude deviation because I was cleared for the approach.
Original NASA ASRS Text
Title: FLC OF ACR LTT ACFT HAD A FALSE TERRAIN WARNING AT THE BEGINNING OF AN APCH AT THE 15 DME LOCATION.
Narrative: APCHING CLEVELAND ON THE 23 LOC. APPROX 15 DME AFTER BEING CLRED FOR THE APCH, THE TERRAIN WARNING SOUNDED. AT THIS TIME WE WERE IN HVY RAIN, MODERATE TURB AND COULD SEE BREAKS IN THE CLOUDS BELOW. I TOLD FO TO CLB UNTIL THE WARNING STOPPED. THE WARNING STOPPED AROUND 5500 FT. I WAS LOOKING OUT THE L SIDE TO SEE IF AN AIRPLANE WAS UNDER US. WE THEN CONTINUED THE APCH AND LANDED AS SCHEDULED IN CLEVELAND. WE WERE NOT SURE IF THE WARNING WAS AN ACFT UNDER US OR IF THE HVY RAIN MAY HAVE CAUSED A FAULTY WARNING. I DID NOT CONTACT APCH TO TELL THEM OF THE MOMENTARY ALTDEV BECAUSE I WAS CLRED FOR THE APCH.
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.