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DO328 flight crew does not clarify clearance, misinterps ATC climb instruction to FL270, and climbs to FL290. ATC questions flight crew when altitude is observed at FL280. PIC disputes clearance. ATC reassigns FL290 as final assigned altitude. First officer, knowing there is no clear understanding, perceives PIC should have clarified clearance.
| Attributes | |
| ACN | 410740 |
| Time | |
| Date | 199808 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : eic |
| State Reference | LA |
| Altitude | msl bound lower : 27000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 245 flight time total : 3700 flight time type : 600 |
| ASRS Report | 410740 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
At approximately XA40 pm, 25 mi west of eic, willey 1 departure, dfw, ATC issued climb to FL290. Switched controllers. ATC said 'direct pns reaching FL270.' ATC controller did not speak very clearly, I thought she said, 'stop at FL270.' I asked captain (PNF). He says, 'I did not hear her say that.' changed frequency again. ATC says, 'what's your altitude.' captain says FL280, climbing FL290. ATC said, 'you were issued FL270.' captain asked, 'do you want us to descend to FL270?' ATC advised, 'no, maintain FL290.' I think part of the problem was ATC was not being very clear about stopping the climb at FL270 and issuing direct to pns after FL270. Previous controller gave us an altitude of FL290. Captain did not seem to care too much about it. He could have called ATC back just to make sure we had to stop at FL270.
Original NASA ASRS Text
Title: DO328 FLC DOES NOT CLARIFY CLRNC, MISINTERPS ATC CLB INSTRUCTION TO FL270, AND CLBS TO FL290. ATC QUESTIONS FLC WHEN ALT IS OBSERVED AT FL280. PIC DISPUTES CLRNC. ATC REASSIGNS FL290 AS FINAL ASSIGNED ALT. FO, KNOWING THERE IS NO CLR UNDERSTANDING, PERCEIVES PIC SHOULD HAVE CLARIFIED CLRNC.
Narrative: AT APPROX XA40 PM, 25 MI W OF EIC, WILLEY 1 DEP, DFW, ATC ISSUED CLB TO FL290. SWITCHED CTLRS. ATC SAID 'DIRECT PNS REACHING FL270.' ATC CTLR DID NOT SPEAK VERY CLRLY, I THOUGHT SHE SAID, 'STOP AT FL270.' I ASKED CAPT (PNF). HE SAYS, 'I DID NOT HEAR HER SAY THAT.' CHANGED FREQ AGAIN. ATC SAYS, 'WHAT'S YOUR ALT.' CAPT SAYS FL280, CLBING FL290. ATC SAID, 'YOU WERE ISSUED FL270.' CAPT ASKED, 'DO YOU WANT US TO DSND TO FL270?' ATC ADVISED, 'NO, MAINTAIN FL290.' I THINK PART OF THE PROB WAS ATC WAS NOT BEING VERY CLR ABOUT STOPPING THE CLB AT FL270 AND ISSUING DIRECT TO PNS AFTER FL270. PREVIOUS CTLR GAVE US AN ALT OF FL290. CAPT DID NOT SEEM TO CARE TOO MUCH ABOUT IT. HE COULD HAVE CALLED ATC BACK JUST TO MAKE SURE WE HAD TO STOP AT FL270.
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.