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An ATR72 PIC report on towers that are above the MDA located near the circling path of aircraft utilizing a GPS approach to runways 12 and 30 to mdst, first officer.
| Attributes | |
| ACN | 498813 |
| Time | |
| Date | 200101 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : mdst.airport |
| State Reference | FO |
| Altitude | agl bound lower : 661 agl bound upper : 944 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | ATR 72 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision approach : circling |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine |
| ASRS Report | 498813 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : multi engine pilot : commercial |
| Events | |
| Anomaly | conflict : ground critical inflight encounter other non adherence : far non adherence : company policies other anomaly other other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Environmental Factor Company Airport Airspace Structure Chart Or Publication |
| Primary Problem | Environmental Factor |
| Situations | |
| Airport | other physical facility procedure or policy : mdst.airport |
| Chart | approach : mdst.gps |
Narrative:
The circling approachs at santiago, dominican republic (cibao intersection mdst) have MDA's lower than obstacles within the maneuvering area: GPS 30 circ 12 has haa of 661 ft but towers near the approach end of runway 12 with hts of 704 ft, 694 ft, 722 ft, and 687 ft. GPS 12 circ 30 has haa of 661 ft but a tower near the approach end of runway 30 with ht of 944 ft! (It's on a hill). There are also 836 ft and 844 ft towers on approach to runway 30 that are shown on the RNAV 12 departure, but not the GPS 30 or GPS 12 approach plates. I don't know the fine points of the terps, but this doesn't seem right to me. I think the MDA should keep you above obstacles within 1 1/2 mi of the field boundary.
Original NASA ASRS Text
Title: AN ATR72 PIC RPT ON TOWERS THAT ARE ABOVE THE MDA LOCATED NEAR THE CIRCLING PATH OF ACFT UTILIZING A GPS APCH TO RWYS 12 AND 30 TO MDST, FO.
Narrative: THE CIRCLING APCHS AT SANTIAGO, DOMINICAN REPUBLIC (CIBAO INTXN MDST) HAVE MDA'S LOWER THAN OBSTACLES WITHIN THE MANEUVERING AREA: GPS 30 CIRC 12 HAS HAA OF 661 FT BUT TOWERS NEAR THE APCH END OF RWY 12 WITH HTS OF 704 FT, 694 FT, 722 FT, AND 687 FT. GPS 12 CIRC 30 HAS HAA OF 661 FT BUT A TOWER NEAR THE APCH END OF RWY 30 WITH HT OF 944 FT! (IT'S ON A HILL). THERE ARE ALSO 836 FT AND 844 FT TOWERS ON APCH TO RWY 30 THAT ARE SHOWN ON THE RNAV 12 DEP, BUT NOT THE GPS 30 OR GPS 12 APCH PLATES. I DON'T KNOW THE FINE POINTS OF THE TERPS, BUT THIS DOESN'T SEEM RIGHT TO ME. I THINK THE MDA SHOULD KEEP YOU ABOVE OBSTACLES WITHIN 1 1/2 MI OF THE FIELD BOUNDARY.
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.