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A C-172 pilot cleared to fly the ILS 29R IAP to toa advised that when on the GS crossing the bason OM he was at about 1;600 MSL vice the charted 1;895 MSL.
| Attributes | |
| ACN | 922695 |
| Time | |
| Date | 201012 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | TOA.Airport |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | ILS/VOR |
| Person 1 | |
| Function | Pilot Flying Single Pilot |
| Qualification | Flight Crew Private Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 6 Flight Crew Total 1025 Flight Crew Type 900 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy |
Narrative:
I was cleared for the ILS 29R to toa after the descent to 2;000 ft and established on the ILS. I intercepted the glide slope well prior to bason and somehow descended below 2;000 ft prior to reaching bason down to about 1;600 ft even though my glide slope reading was dead on. Either the transmitted glide slope is low or my indicator is wrong because the approach plate shows the slope signal crossing bason at 1;895 ft.
Original NASA ASRS Text
Title: A C-172 Pilot cleared to fly the ILS 29R IAP to TOA advised that when on the GS crossing the BASON OM he was at about 1;600 MSL vice the charted 1;895 MSL.
Narrative: I was cleared for the ILS 29R to TOA after the descent to 2;000 FT and established on the ILS. I intercepted the glide slope well prior to BASON and somehow descended below 2;000 FT prior to reaching BASON down to about 1;600 FT even though my glide slope reading was dead on. Either the transmitted glide slope is low or my indicator is wrong because the approach plate shows the slope signal crossing BASON at 1;895 FT.
Data retrieved from NASA's ASRS site as of April 2012 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.