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Cpr small aircraft pilot misreads instrument on IAP back course localizer approach and descends prematurely. Altitude crossing restriction not met in altitude deviation altitude excursion.
| Attributes | |
| ACN | 210839 |
| Time | |
| Date | 199205 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : cll |
| State Reference | TX |
| Altitude | msl bound lower : 920 msl bound upper : 2300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : cll |
| Operator | general aviation : corporate |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other descent : approach descent other |
| Route In Use | approach : straight in |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 85 flight time total : 700 |
| ASRS Report | 210839 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met non adherence : published procedure non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
I descended below 2300 ft MSL before reaching bryin intersection on the localizer back course runway 16 cll. I descended to 920 ft MSL where the altitude would have been 2300 ft MSL. This occurred because I mistakenly thought I had crossed bryin. Center informed tower and tower informed me. I began an immediate climb but crossed bryin within about 20 seconds. I need to determine which side the #2 VOR CDI is on before and after the fix during my approach briefing. I thought I saw the CDI go to the center of the indicator, showing that I was crossing bryin, but was mistaken. A DME distance from cll VOR to bryin might make this mistake less likely if it were on the approach plate. It would make it easier to fix bryin on the approach.
Original NASA ASRS Text
Title: CPR SMA PLT MISREADS INST ON IAP BACK COURSE LOC APCH AND DSNDS PREMATURELY. ALT XING RESTRICTION NOT MET IN ALTDEV ALT EXCURSION.
Narrative: I DSNDED BELOW 2300 FT MSL BEFORE REACHING BRYIN INTXN ON THE LOC BACK COURSE RWY 16 CLL. I DSNDED TO 920 FT MSL WHERE THE ALT WOULD HAVE BEEN 2300 FT MSL. THIS OCCURRED BECAUSE I MISTAKENLY THOUGHT I HAD CROSSED BRYIN. CTR INFORMED TWR AND TWR INFORMED ME. I BEGAN AN IMMEDIATE CLB BUT CROSSED BRYIN WITHIN ABOUT 20 SECONDS. I NEED TO DETERMINE WHICH SIDE THE #2 VOR CDI IS ON BEFORE AND AFTER THE FIX DURING MY APCH BRIEFING. I THOUGHT I SAW THE CDI GO TO THE CTR OF THE INDICATOR, SHOWING THAT I WAS XING BRYIN, BUT WAS MISTAKEN. A DME DISTANCE FROM CLL VOR TO BRYIN MIGHT MAKE THIS MISTAKE LESS LIKELY IF IT WERE ON THE APCH PLATE. IT WOULD MAKE IT EASIER TO FIX BRYIN ON 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.