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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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A B747-400 flight crew receives a message by cpdlc to climb in a block altitude while flying the pacific in ZOA airspace. ARTCC calls by HF radio and rescinds clearance.
| Attributes | |
| ACN | 424272 |
| Time | |
| Date | 199901 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zoa |
| State Reference | CA |
| Altitude | msl bound lower : 35000 msl bound upper : 37000 |
| Environment | |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | tower : lax |
| Operator | common carrier : air carrier |
| Make Model Name | B747-400 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : pacific |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer |
| Experience | flight time total : 18000 |
| ASRS Report | 424272 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
Received cpdlc clearance for block altitude FL350/FL370. Began climb to FL370 and received HF radio call to rescind climb due to no clearance. Have written documentation of ATC clearance received over printer through cpdlc.
Original NASA ASRS Text
Title: A B747-400 FLC RECEIVES A MESSAGE BY CPDLC TO CLB IN A BLOCK ALT WHILE FLYING THE PACIFIC IN ZOA AIRSPACE. ARTCC CALLS BY HF RADIO AND RESCINDS CLRNC.
Narrative: RECEIVED CPDLC CLRNC FOR BLOCK ALT FL350/FL370. BEGAN CLB TO FL370 AND RECEIVED HF RADIO CALL TO RESCIND CLB DUE TO NO CLRNC. HAVE WRITTEN DOCUMENTATION OF ATC CLRNC RECEIVED OVER PRINTER THROUGH CPDLC.
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.