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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Charter pilot encountered plus 14 degrees temperature change while over atlantic. Resulting airspeed change was not reported or adjusted in timely manner.
| Attributes | |
| ACN | 308790 |
| Time | |
| Date | 199506 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : yqx |
| State Reference | NF |
| Altitude | msl bound lower : 37000 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : czqx |
| Operator | common carrier : air taxi |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : other oceanic enroute : atlantic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 120 flight time total : 3000 flight time type : 1100 |
| ASRS Report | 308790 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | non adherence : far other anomaly other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | other other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
On company approved flight plan and trans oceanic clearance to maintain FL370 and mach .74. We encountered a dramatic change in temperature of plus 14 degrees. As I started to react with more power to compensate for the loss in mach speed, gander radio asked us for our mach speed, the first officer's response was mach .73. Soon after his response we were back up to mach .74. Gander radio told to maintain .74.
Original NASA ASRS Text
Title: CHARTER PLT ENCOUNTERED PLUS 14 DEGS TEMP CHANGE WHILE OVER ATLANTIC. RESULTING AIRSPD CHANGE WAS NOT RPTED OR ADJUSTED IN TIMELY MANNER.
Narrative: ON COMPANY APPROVED FLT PLAN AND TRANS OCEANIC CLRNC TO MAINTAIN FL370 AND MACH .74. WE ENCOUNTERED A DRAMATIC CHANGE IN TEMP OF PLUS 14 DEGS. AS I STARTED TO REACT WITH MORE PWR TO COMPENSATE FOR THE LOSS IN MACH SPD, GANDER RADIO ASKED US FOR OUR MACH SPD, THE FO'S RESPONSE WAS MACH .73. SOON AFTER HIS RESPONSE WE WERE BACK UP TO MACH .74. GANDER RADIO TOLD TO MAINTAIN .74.
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.