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B727 had noted OM and MM runway 9R was unmonitored. Chief pilot said a CAT ii approach could be made since the markers were functioning. On approach at MM had wild fluctuations of GS and made a go around. Second approach similar problems but land ok. Feels serious safety factor.
| Attributes | |
| ACN | 362354 |
| Time | |
| Date | 199702 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : atl |
| State Reference | GA |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : atl |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach landing : go around |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 362354 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | inflight encounter other non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Airport |
| Air Traffic Incident | other |
| Situations | |
| Airport | other physical facility |
Narrative:
Our paperwork indicated that the OM and MM in atl runway 9R was unmonitored. Questioning the legality of doing a CAT ii approach, I asked chief pilot if this was ok, and he told me the markers are not inoperative, just unmonitored. The autoplt had to be disconnected during our first attempt, due to wild GS oscillations (?). On the second approach we had similar results, indicating the MM may have been inoperative, thus not triggering the desensitization of the GS on the B727. This is a serious safety factor and should not be allowed to continue. We need to know if the equipment is working or not!
Original NASA ASRS Text
Title: B727 HAD NOTED OM AND MM RWY 9R WAS UNMONITORED. CHIEF PLT SAID A CAT II APCH COULD BE MADE SINCE THE MARKERS WERE FUNCTIONING. ON APCH AT MM HAD WILD FLUCTUATIONS OF GS AND MADE A GAR. SECOND APCH SIMILAR PROBS BUT LAND OK. FEELS SERIOUS SAFETY FACTOR.
Narrative: OUR PAPERWORK INDICATED THAT THE OM AND MM IN ATL RWY 9R WAS UNMONITORED. QUESTIONING THE LEGALITY OF DOING A CAT II APCH, I ASKED CHIEF PLT IF THIS WAS OK, AND HE TOLD ME THE MARKERS ARE NOT INOP, JUST UNMONITORED. THE AUTOPLT HAD TO BE DISCONNECTED DURING OUR FIRST ATTEMPT, DUE TO WILD GS OSCILLATIONS (?). ON THE SECOND APCH WE HAD SIMILAR RESULTS, INDICATING THE MM MAY HAVE BEEN INOP, THUS NOT TRIGGERING THE DESENSITIZATION OF THE GS ON THE B727. THIS IS A SERIOUS SAFETY FACTOR AND SHOULD NOT BE ALLOWED TO CONTINUE. WE NEED TO KNOW IF THE EQUIP IS WORKING OR NOT!
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.