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A B737-300 flight crew is given an improper clearance that was meant to be an altitude crossing restr by ATC for cofax intersection, PA.
| Attributes | |
| ACN | 525706 |
| Time | |
| Date | 200107 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : cofax |
| State Reference | PA |
| Altitude | msl bound lower : 25000 msl bound upper : 26000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time type : 285 |
| ASRS Report | 525706 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time type : 1227 |
| ASRS Report | 525709 |
| Events | |
| Anomaly | altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : clearance non adherence : published procedure other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory none taken : anomaly accepted none taken : insufficient time |
| Consequence | faa : reviewed incident with flight crew other |
| Supplementary | |
| Problem Areas | ATC Human Performance Airspace Structure Flight Crew Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
Initially received a vector and descent clearance to FL250. After a couple mins, controller said 'air carrier XXXX cleared direct cofax and uhhhh 250...that will work.' we read back 'direct cofax down to FL250.' we never received a crossing restr. 9 mi west of cofax the controller asked us if we would be able to make cofax at FL250 or else he would have to make several phone calls. We said that he should probably start making the phone calls. We increased our descent and missed cofax by 1000 ft. We were then passed on to ZNY. We feel that this was caused due to non standard phraseology.
Original NASA ASRS Text
Title: A B737-300 FLC IS GIVEN AN IMPROPER CLRNC THAT WAS MEANT TO BE AN ALT XING RESTR BY ATC FOR COFAX INTXN, PA.
Narrative: INITIALLY RECEIVED A VECTOR AND DSCNT CLRNC TO FL250. AFTER A COUPLE MINS, CTLR SAID 'ACR XXXX CLRED DIRECT COFAX AND UHHHH 250...THAT WILL WORK.' WE READ BACK 'DIRECT COFAX DOWN TO FL250.' WE NEVER RECEIVED A XING RESTR. 9 MI W OF COFAX THE CTLR ASKED US IF WE WOULD BE ABLE TO MAKE COFAX AT FL250 OR ELSE HE WOULD HAVE TO MAKE SEVERAL PHONE CALLS. WE SAID THAT HE SHOULD PROBABLY START MAKING THE PHONE CALLS. WE INCREASED OUR DSCNT AND MISSED COFAX BY 1000 FT. WE WERE THEN PASSED ON TO ZNY. WE FEEL THAT THIS WAS CAUSED DUE TO NON STANDARD PHRASEOLOGY.
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.