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Cpr Y non adherence to ATC clearance unauthorized descent from assigned altitude had less than standard separation from small aircraft Y. Pilot deviation.
| Attributes | |
| ACN | 203433 |
| Time | |
| Date | 199203 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : pae |
| State Reference | WA |
| Altitude | msl bound lower : 3000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zse tower : lax |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Fixed Gear |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar instruction : trainee |
| Qualification | controller : developmental |
| ASRS Report | 203433 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar instruction : instructor |
| Qualification | controller : radar |
| ASRS Report | 203036 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Miss Distance | horizontal : 15000 vertical : 600 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Corp Y, vectored to the localizer was assigned heading 110 to maintain 4000 ft. Correctly read back by pilot. Small aircraft Y, IFR, vectored 090 at 3000 ft to diverge from the localizer and crp Y. Crp Y then was issued turn to 130 to intercept the localizer, maintain 4000 ft. Cpr Y readback 'heading 130 to 3.' this was not caught by myself or the instructor. Mode C was observed at 037. I reclred cpr Y to maintain 4000. He replied 'oh, I thought you said 3,' and he climbed back to 4000 ft. Supplemental information from acn 203036: cpr Y assigned 4000 ft readback correct. Small aircraft Y aircraft issued IFR clearance readback correct. Cpr Y issued heading and altitude maintain 4000 ft readback incorrect. WX dissipating and had received 3 pop-up requests for IFR in a 2 min time frame.
Original NASA ASRS Text
Title: CPR Y NON ADHERENCE TO ATC CLRNC UNAUTH DSCNT FROM ASSIGNED ALT HAD LTSS FROM SMA Y. PLTDEV.
Narrative: CORP Y, VECTORED TO THE LOC WAS ASSIGNED HDG 110 TO MAINTAIN 4000 FT. CORRECTLY READ BACK BY PLT. SMA Y, IFR, VECTORED 090 AT 3000 FT TO DIVERGE FROM THE LOC AND CRP Y. CRP Y THEN WAS ISSUED TURN TO 130 TO INTERCEPT THE LOC, MAINTAIN 4000 FT. CPR Y READBACK 'HDG 130 TO 3.' THIS WAS NOT CAUGHT BY MYSELF OR THE INSTRUCTOR. MODE C WAS OBSERVED AT 037. I RECLRED CPR Y TO MAINTAIN 4000. HE REPLIED 'OH, I THOUGHT YOU SAID 3,' AND HE CLBED BACK TO 4000 FT. SUPPLEMENTAL INFO FROM ACN 203036: CPR Y ASSIGNED 4000 FT READBACK CORRECT. SMA Y ACFT ISSUED IFR CLRNC READBACK CORRECT. CPR Y ISSUED HDG AND ALT MAINTAIN 4000 FT READBACK INCORRECT. WX DISSIPATING AND HAD RECEIVED 3 POP-UP REQUESTS FOR IFR IN A 2 MIN TIME FRAME.
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.