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Cpr PIC perceived clearance instructions for ILS approach to gyy airport by ord TRACON were inaccurate and questioned the controller. Controller reiterated clearance and restrs, again clearing aircraft for approach and changed aircraft to gyy tower. PIC questioned tower local controller, who advised preceding aircraft on approach also had problem with TRACON controller's clearance. PIC elected to follow published procedure and land.
| Attributes | |
| ACN | 390734 |
| Time | |
| Date | 199801 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : gyy |
| State Reference | IN |
| Altitude | msl bound lower : 1941 msl bound upper : 2400 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord tower : gyy tower : new |
| Operator | general aviation : corporate |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach descent other |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : instrument pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 75 flight time total : 14000 flight time type : 4000 |
| ASRS Report | 390734 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Vectored by chicago approach control to gyy ILS runway 30. Given final heading 270 degrees to intercept gyy ILS approach course maintain 2400 ft and cleared for ILS approach, then told to maintain 2400 ft until crossing gy OM and cleared for approach. ILS, GS crossing altitude is 1941 ft. Procedure turn altitude is 2400 ft, then 2000 ft inbound till GS intercept. Tried to clarify with approach control, but told again to cross gy OM at 2400 ft cleared for ILS, call gary tower on 125.6. We told gyy tower our situation and he told us king air before us had the same problem and couldn't get down on the approach and missed. I elected to follow the approach procedure, maintaining 2400 ft until localizer intercept and GS intercept and followed ILS inbound, crossing gy NDB (OM) at 1941 ft MSL as published. Controller instructions not consistent with procedure.
Original NASA ASRS Text
Title: CPR PIC PERCEIVED CLRNC INSTRUCTIONS FOR ILS APCH TO GYY ARPT BY ORD TRACON WERE INACCURATE AND QUESTIONED THE CTLR. CTLR REITERATED CLRNC AND RESTRS, AGAIN CLRING ACFT FOR APCH AND CHANGED ACFT TO GYY TWR. PIC QUESTIONED TWR LCL CTLR, WHO ADVISED PRECEDING ACFT ON APCH ALSO HAD PROB WITH TRACON CTLR'S CLRNC. PIC ELECTED TO FOLLOW PUBLISHED PROC AND LAND.
Narrative: VECTORED BY CHICAGO APCH CTL TO GYY ILS RWY 30. GIVEN FINAL HDG 270 DEGS TO INTERCEPT GYY ILS APCH COURSE MAINTAIN 2400 FT AND CLRED FOR ILS APCH, THEN TOLD TO MAINTAIN 2400 FT UNTIL XING GY OM AND CLRED FOR APCH. ILS, GS XING ALT IS 1941 FT. PROC TURN ALT IS 2400 FT, THEN 2000 FT INBOUND TILL GS INTERCEPT. TRIED TO CLARIFY WITH APCH CTL, BUT TOLD AGAIN TO CROSS GY OM AT 2400 FT CLRED FOR ILS, CALL GARY TWR ON 125.6. WE TOLD GYY TWR OUR SIT AND HE TOLD US KING AIR BEFORE US HAD THE SAME PROB AND COULDN'T GET DOWN ON THE APCH AND MISSED. I ELECTED TO FOLLOW THE APCH PROC, MAINTAINING 2400 FT UNTIL LOC INTERCEPT AND GS INTERCEPT AND FOLLOWED ILS INBOUND, XING GY NDB (OM) AT 1941 FT MSL AS PUBLISHED. CTLR INSTRUCTIONS NOT CONSISTENT WITH PROC.
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.