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Flight crew of ATR descends to 6000 ft vice 7000 ft due to clearance hearback clearance readback problem. Also dispute proper course out of coy VOR.
| Attributes | |
| ACN | 652392 |
| Time | |
| Date | 200503 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : tkpk.airport |
| State Reference | FO |
| Altitude | msl bound lower : 15000 msl bound upper : 6000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : tjzs.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | ATR Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 652392 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 650980 |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Chart Or Publication Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Ambiguous |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Cruising at 15000 ft; got crossing restr to gabar intersection at what we understood at 6000 ft and read back to ATC 6000 ft. No further transmission occurred. At gabar intersection; upon handoff; ATC asked our altitude because he was apparently expecting us at 7000 ft. Then he accepted us at 6000 ft with no apparent loss of separation and were handed off to tkpk airspace. The high/low altitude chart has G633 from dande to gabar as coy R117 and ATC shows same airway as coy R115 which is a 6 mi difference; we were given vectors to rejoin the airway.
Original NASA ASRS Text
Title: FLT CREW OF ATR DSNDS TO 6000 FT VICE 7000 FT DUE TO CLRNC HEARBACK CLRNC READBACK PROB. ALSO DISPUTE PROPER COURSE OUT OF COY VOR.
Narrative: CRUISING AT 15000 FT; GOT XING RESTR TO GABAR INTXN AT WHAT WE UNDERSTOOD AT 6000 FT AND READ BACK TO ATC 6000 FT. NO FURTHER XMISSION OCCURRED. AT GABAR INTXN; UPON HDOF; ATC ASKED OUR ALT BECAUSE HE WAS APPARENTLY EXPECTING US AT 7000 FT. THEN HE ACCEPTED US AT 6000 FT WITH NO APPARENT LOSS OF SEPARATION AND WERE HANDED OFF TO TKPK AIRSPACE. THE HIGH/LOW ALT CHART HAS G633 FROM DANDE TO GABAR AS COY R117 AND ATC SHOWS SAME AIRWAY AS COY R115 WHICH IS A 6 MI DIFFERENCE; WE WERE GIVEN VECTORS TO REJOIN THE AIRWAY.
Data retrieved from NASA's ASRS site as of January 2009 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.