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Cessna 525 first officer requested an altitude change using unconventional phraseology which resulted in the ARTCC controller issuing a conflicting altitude.
| Attributes | |
| ACN | 520911 |
| Time | |
| Date | 200108 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zhu.artcc |
| State Reference | TX |
| Altitude | msl bound lower : 16000 msl bound upper : 17000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Citationjet, C525/C526 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | climbout : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : commercial pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 200 flight time total : 1600 flight time type : 20 |
| ASRS Report | 520911 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 145 flight time total : 4250 flight time type : 468 |
| ASRS Report | 520912 |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | controller : issued new clearance controller : separated traffic |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | vertical : 1000 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
I requested '20 we are in the tops.' controller responded 'who is requesting 20.' I responded 'nxxxxx.' controller responded 'cleared 20.' I initiated climb for 16000 ft to 20000 ft. At 17000 ft, controller asked for my altitude. I responded '17000 ft for FL200.' controller said 'XXX level 17000 ft traffic alert.' I immediately leveled at 17000 ft. I think the factors involved were: my (pilot's) incorrect phraseology in saying '20' instead of 'FL200.' the controller was busy and only said 'cleared 20.' communication breakdown between pilot and controller.
Original NASA ASRS Text
Title: CESSNA 525 FO REQUESTED AN ALT CHANGE USING UNCONVENTIONAL PHRASEOLOGY WHICH RESULTED IN THE ARTCC CTLR ISSUING A CONFLICTING ALT.
Narrative: I REQUESTED '20 WE ARE IN THE TOPS.' CTLR RESPONDED 'WHO IS REQUESTING 20.' I RESPONDED 'NXXXXX.' CTLR RESPONDED 'CLRED 20.' I INITIATED CLB FOR 16000 FT TO 20000 FT. AT 17000 FT, CTLR ASKED FOR MY ALT. I RESPONDED '17000 FT FOR FL200.' CTLR SAID 'XXX LEVEL 17000 FT TFC ALERT.' I IMMEDIATELY LEVELED AT 17000 FT. I THINK THE FACTORS INVOLVED WERE: MY (PLT'S) INCORRECT PHRASEOLOGY IN SAYING '20' INSTEAD OF 'FL200.' THE CTLR WAS BUSY AND ONLY SAID 'CLRED 20.' COM BREAKDOWN BTWN PLT AND CTLR.
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.