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Pilot of a piper PA32 was cleared to a lower altitude than legally specified for transition altitude for an ILS approach.
| Attributes | |
| ACN | 490480 |
| Time | |
| Date | 200010 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : cid.vor |
| State Reference | IA |
| Altitude | msl bound lower : 2000 msl bound upper : 2700 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : cid.tracon |
| Operator | general aviation : personal |
| Make Model Name | Piper Twin Piston Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | ils localizer & glide slope : 27 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | approach : instrument precision arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : private |
| Experience | flight time last 90 days : 25 flight time total : 403 flight time type : 93 |
| ASRS Report | 490480 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued alert flight crew : returned to assigned altitude |
| Consequence | Other |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Deviation other |
Narrative:
ZAU had me descend to 3000 ft and told to contact cid approach. Contacted cid approach and was told to expect vectors for the ILS runway 27 at cid. Was told to descend to 2000 ft. Started getting vectors for the approach. While on a 40 degree intercept, cid approach asked me to verify altitude. I replied 2000 ft to which cid approach informed me that I was supposed to be at 2700 ft. I then climbed back up to 2700 ft. What I should have done is to totally familiarize myself with all altitudes at the various position of the cid ILS runway 27. Had I done that, I would have been able to question the clearance to descend to 2000 ft. The government approach plate clearly states 2700 ft must be maintained until intercepting the GS. From this experience I have learned that I should not rely on the controllers but to verify clrncs with the approach charts. There are other critical altitudes other than decision ht.
Original NASA ASRS Text
Title: PLT OF A PIPER PA32 WAS CLRED TO A LOWER ALT THAN LEGALLY SPECIFIED FOR TRANSITION ALT FOR AN ILS APCH.
Narrative: ZAU HAD ME DSND TO 3000 FT AND TOLD TO CONTACT CID APCH. CONTACTED CID APCH AND WAS TOLD TO EXPECT VECTORS FOR THE ILS RWY 27 AT CID. WAS TOLD TO DSND TO 2000 FT. STARTED GETTING VECTORS FOR THE APCH. WHILE ON A 40 DEG INTERCEPT, CID APCH ASKED ME TO VERIFY ALT. I REPLIED 2000 FT TO WHICH CID APCH INFORMED ME THAT I WAS SUPPOSED TO BE AT 2700 FT. I THEN CLBED BACK UP TO 2700 FT. WHAT I SHOULD HAVE DONE IS TO TOTALLY FAMILIARIZE MYSELF WITH ALL ALTS AT THE VARIOUS POS OF THE CID ILS RWY 27. HAD I DONE THAT, I WOULD HAVE BEEN ABLE TO QUESTION THE CLRNC TO DSND TO 2000 FT. THE GOV APCH PLATE CLRLY STATES 2700 FT MUST BE MAINTAINED UNTIL INTERCEPTING THE GS. FROM THIS EXPERIENCE I HAVE LEARNED THAT I SHOULD NOT RELY ON THE CTLRS BUT TO VERIFY CLRNCS WITH THE APCH CHARTS. THERE ARE OTHER CRITICAL ALTS OTHER THAN DECISION HT.
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.