 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B767 flight leveled at FL330 and requested clearance to '350' with '370' later. While in the climb to FL350 the controller advised the crew he did not issue a clearance to FL350.
| Attributes | |
| ACN | 636578 |
| Time | |
| Date | 200411 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : flg.vor |
| State Reference | AZ |
| Altitude | msl bound lower : 33000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zab.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : vacating altitude cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : multi engine pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 90 flight time total : 3900 flight time type : 500 |
| ASRS Report | 636578 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : radar/ mode c other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance none taken : detected after the fact |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
We reported in to ZAB 'level at FL330, request 350.' we were eastbound at time of report. ZAB replied, 'do you mean to request 370?' we replied, 'yes, request 370.' ZAB replied, 'maintain 350, expect clearance to 370 shortly.' we replied, 'roger, climbing to 350, we'll expect clearance to 370 later.' in the climb, ZAB said 'I see you're climbing. Maintain 350, I did not clear you to climb.' we replied, 'roger, we will level at 350. We understood that you cleared us to 350.' ZAB replied, 'don't worry about it, just level at 350.' we did and were subsequently cleared to 370. What really caused the problem: center misspoke in saying 'maintain 350' and did not correct us when we reported 'climbing' out of 330 to 350.
Original NASA ASRS Text
Title: A B767 FLT LEVELED AT FL330 AND REQUESTED CLRNC TO '350' WITH '370' LATER. WHILE IN THE CLB TO FL350 THE CTLR ADVISED THE CREW HE DID NOT ISSUE A CLRNC TO FL350.
Narrative: WE RPTED IN TO ZAB 'LEVEL AT FL330, REQUEST 350.' WE WERE EBOUND AT TIME OF RPT. ZAB REPLIED, 'DO YOU MEAN TO REQUEST 370?' WE REPLIED, 'YES, REQUEST 370.' ZAB REPLIED, 'MAINTAIN 350, EXPECT CLRNC TO 370 SHORTLY.' WE REPLIED, 'ROGER, CLBING TO 350, WE'LL EXPECT CLRNC TO 370 LATER.' IN THE CLB, ZAB SAID 'I SEE YOU'RE CLBING. MAINTAIN 350, I DID NOT CLR YOU TO CLB.' WE REPLIED, 'ROGER, WE WILL LEVEL AT 350. WE UNDERSTOOD THAT YOU CLRED US TO 350.' ZAB REPLIED, 'DON'T WORRY ABOUT IT, JUST LEVEL AT 350.' WE DID AND WERE SUBSEQUENTLY CLRED TO 370. WHAT REALLY CAUSED THE PROB: CTR MISSPOKE IN SAYING 'MAINTAIN 350' AND DID NOT CORRECT US WHEN WE RPTED 'CLBING' OUT OF 330 TO 350.
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.