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Mistakenly thinking his new vector heading was to intercept the localizer just as the previous one was a pilot is surprised to receive a holding clearance that would resolve a traffic conflict problem.
| Attributes | |
| ACN | 526980 |
| Time | |
| Date | 200110 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | intersection : cladd |
| State Reference | VA |
| Altitude | msl single value : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 24 flight time total : 2226 flight time type : 193 |
| ASRS Report | 526980 |
| Events | |
| Anomaly | non adherence : clearance other spatial deviation |
| Resolutory Action | controller : issued new clearance flight crew : became reoriented other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On IFR flight from iad to okv. Original clearance was fly 280 degrees to intercept okv ILS runway 32 localizer. The clearance was changed to fly 270 degrees for spacing. Here was the misunderstanding. When I crossed the localizer, I turned back to intercept the localizer. Iad approach asked my heading. I answered 324 degrees. He said he thought I was on 270 degree vector. I answered I was intercepting the localizer. He then told me to hold as published at clapp. (By this time I was outside the 'enhanced' class B airspace, and asked to cancel IFR. Approach agreed and I continued VFR to okv to the right of the slower traffic which was doing an NDB approach at okv.) now I realize, once the controller changed my heading from 280 degrees to 270 degrees, the previous clearance to intercept the okv ILS runway 32 localizer, was also no longer in effect. I'll realize from now on that slight heading changes in a clearance, changes the rest of the clearance too.
Original NASA ASRS Text
Title: MISTAKENLY THINKING HIS NEW VECTOR HEADING WAS TO INTERCEPT THE LOC JUST AS THE PREVIOUS ONE WAS A PLT IS SURPRISED TO RECEIVE A HOLDING CLRNC THAT WOULD RESOLVE A TFC CONFLICT PROB.
Narrative: ON IFR FLT FROM IAD TO OKV. ORIGINAL CLRNC WAS FLY 280 DEGS TO INTERCEPT OKV ILS RWY 32 LOC. THE CLRNC WAS CHANGED TO FLY 270 DEGS FOR SPACING. HERE WAS THE MISUNDERSTANDING. WHEN I CROSSED THE LOC, I TURNED BACK TO INTERCEPT THE LOC. IAD APCH ASKED MY HEADING. I ANSWERED 324 DEGS. HE SAID HE THOUGHT I WAS ON 270 DEG VECTOR. I ANSWERED I WAS INTERCEPTING THE LOC. HE THEN TOLD ME TO HOLD AS PUBLISHED AT CLAPP. (BY THIS TIME I WAS OUTSIDE THE 'ENHANCED' CLASS B AIRSPACE, AND ASKED TO CANCEL IFR. APCH AGREED AND I CONTINUED VFR TO OKV TO THE R OF THE SLOWER TFC WHICH WAS DOING AN NDB APCH AT OKV.) NOW I REALIZE, ONCE THE CTLR CHANGED MY HEADING FROM 280 DEGS TO 270 DEGS, THE PREVIOUS CLRNC TO INTERCEPT THE OKV ILS RWY 32 LOC, WAS ALSO NO LONGER IN EFFECT. I'LL REALIZE FROM NOW ON THAT SLIGHT HEADING CHANGES IN A CLRNC, CHANGES THE REST OF THE CLRNC TOO.
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.