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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Large transport cleared at FL370, unable normal performance. Cleared lower altitude with vector to descend.
| Attributes | |
| ACN | 101846 |
| Time | |
| Date | 198901 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : jan |
| State Reference | MS |
| Altitude | msl bound lower : 36500 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zme |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute airway : zme |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : flight engineer pilot : cfi |
| Experience | flight time last 90 days : 100 flight time total : 11400 flight time type : 1600 |
| ASRS Report | 101846 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : commercial pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 15000 |
| ASRS Report | 102070 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude other anomaly |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Aircraft would not maintain programmed cruise speed. Mach number at FL370. Aircraft performance charts and pdcs affirmed ability to do so. Request for lower altitude was made but not available. Turn was given for lower altitude and for traffic. Aircraft speed degraded to 210-205 KTS indicated. Possible solution: noting the rate of climb and airspeed during climb and having a minimum rate and speed in mind and not going below these limits.
Original NASA ASRS Text
Title: LGT CLEARED AT FL370, UNABLE NORMAL PERFORMANCE. CLEARED LOWER ALT WITH VECTOR TO DESCEND.
Narrative: ACFT WOULD NOT MAINTAIN PROGRAMMED CRUISE SPEED. MACH NUMBER AT FL370. ACFT PERFORMANCE CHARTS AND PDCS AFFIRMED ABILITY TO DO SO. REQUEST FOR LOWER ALT WAS MADE BUT NOT AVAILABLE. TURN WAS GIVEN FOR LOWER ALT AND FOR TFC. ACFT SPEED DEGRADED TO 210-205 KTS INDICATED. POSSIBLE SOLUTION: NOTING THE RATE OF CLIMB AND AIRSPEED DURING CLIMB AND HAVING A MINIMUM RATE AND SPEED IN MIND AND NOT GOING BELOW THESE LIMITS.
Data retrieved from NASA's ASRS site as of August 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.