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Flight crew of an medium large transport cruising at FL350 were informed by the next center controller that their clearance had been amended to FL330. Crew advised center that they had not received that clearance.
| Attributes | |
| ACN | 465680 |
| Time | |
| Date | 200003 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| State Reference | AZ |
| Altitude | msl bound lower : 33000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 10000 flight time type : 2000 |
| ASRS Report | 465680 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 510 flight time total : 20000 flight time type : 15000 |
| ASRS Report | 465489 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Flight cleared to climb and maintain FL350 by ZLA controller on 128.07. Clearance to climb read back by first officer. Controller told flight to maintain FL330 within 10 NM. Said climb clearance had been amended, transmission not received by flight. Center controller stated that climb clearance had previously amended to maintain FL330 and proceed direct beryl intersection, flight responded that amendment was not received, and that another aircraft had read back our clearance.
Original NASA ASRS Text
Title: FLC OF AN MLG CRUISING AT FL350 WERE INFORMED BY THE NEXT CTR CTLR THAT THEIR CLRNC HAD BEEN AMENDED TO FL330. CREW ADVISED CTR THAT THEY HAD NOT RECEIVED THAT CLRNC.
Narrative: FLT CLRED TO CLB AND MAINTAIN FL350 BY ZLA CTLR ON 128.07. CLRNC TO CLB READ BACK BY FO. CTLR TOLD FLT TO MAINTAIN FL330 WITHIN 10 NM. SAID CLB CLRNC HAD BEEN AMENDED, XMISSION NOT RECEIVED BY FLT. CTR CTLR STATED THAT CLB CLRNC HAD PREVIOUSLY AMENDED TO MAINTAIN FL330 AND PROCEED DIRECT BERYL INTXN, FLT RESPONDED THAT AMENDMENT WAS NOT RECEIVED, AND THAT ANOTHER ACFT HAD READ BACK OUR CLRNC.
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.