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An E120 crew, flying a localizer approach to cae, started their descent to the MDA prematurely, citing they heard the IAF (marker) identify.
| Attributes | |
| ACN | 565633 |
| Time | |
| Date | 200211 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : vykus |
| State Reference | SC |
| Altitude | msl single value : 1100 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : cae.tracon tower : cae.tower |
| Operator | common carrier : air taxi |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : cae.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : charter |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : commercial pilot : cfi |
| Experience | controller non radar : 6 controller radar : 6 flight time last 90 days : 250 flight time total : 2000 flight time type : 530 |
| ASRS Report | 565633 |
| Person 2 | |
| Affiliation | company : charter |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude altitude deviation : crossing restriction not met non adherence : published procedure non adherence : company policies other anomaly other |
| Independent Detector | aircraft equipment : gpws aircraft equipment : altitude alert other controllera |
| Resolutory Action | controller : issued alert flight crew : took evasive action other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Airport Navigational Facility Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On the localizer runway 29 approach to columbia metropolitan (cae) at approximately XA00. Maintain 1600 ft as controller advised. We were then cleared for the localizer 29 approach to cae. Waiting for the IAF, to descend to 700 ft MSL (473 ft AGL), we received the beacon and started to descend to MDA. While descending, tower advised a low altitude alert saying we had not reached the IAF. I advised that we had received it and started to descend. Had airport in sight, advised us we were cleared to land. Upon landing, he asked the following air carrier on the same approach when he received the IAF. He stated that he received faint signals further out on the approach. Tower said thank you. Decisions: we could have asked to verify the IAF (rykvs). Factors were: signal from beacon not 100% clear, inclement wind, rain, WX. These were all factors that were involved in this event. Callback conversation with cae tower specialist revealed the following information: no reports of marker unreliability have been received.
Original NASA ASRS Text
Title: AN E120 CREW, FLYING A LOC APCH TO CAE, STARTED THEIR DSCNT TO THE MDA PREMATURELY, CITING THEY HEARD THE IAF (MARKER) IDENT.
Narrative: ON THE LOC RWY 29 APCH TO COLUMBIA METRO (CAE) AT APPROX XA00. MAINTAIN 1600 FT AS CTLR ADVISED. WE WERE THEN CLRED FOR THE LOC 29 APCH TO CAE. WAITING FOR THE IAF, TO DSND TO 700 FT MSL (473 FT AGL), WE RECEIVED THE BEACON AND STARTED TO DSND TO MDA. WHILE DSNDING, TWR ADVISED A LOW ALT ALERT SAYING WE HAD NOT REACHED THE IAF. I ADVISED THAT WE HAD RECEIVED IT AND STARTED TO DSND. HAD ARPT IN SIGHT, ADVISED US WE WERE CLRED TO LAND. UPON LNDG, HE ASKED THE FOLLOWING ACR ON THE SAME APCH WHEN HE RECEIVED THE IAF. HE STATED THAT HE RECEIVED FAINT SIGNALS FURTHER OUT ON THE APCH. TWR SAID THANK YOU. DECISIONS: WE COULD HAVE ASKED TO VERIFY THE IAF (RYKVS). FACTORS WERE: SIGNAL FROM BEACON NOT 100% CLR, INCLEMENT WIND, RAIN, WX. THESE WERE ALL FACTORS THAT WERE INVOLVED IN THIS EVENT. CALLBACK CONVERSATION WITH CAE TWR SPECIALIST REVEALED THE FOLLOWING INFO: NO RPTS OF MARKER UNRELIABILITY HAVE BEEN RECEIVED.
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.