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A B727 climbing to FL190 in ZME airspace climbs above its assigned altitude when given a descent clearance.
| Attributes | |
| ACN | 398130 |
| Time | |
| Date | 199803 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : ujm |
| State Reference | AR |
| Altitude | msl bound lower : 18800 msl bound upper : 19300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zme tracon : lax |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude cruise other descent other |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 15000 flight time type : 6000 |
| ASRS Report | 398130 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 35 flight time total : 2600 flight time type : 35 |
| ASRS Report | 397629 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa other other : unspecified cockpit |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : became reoriented |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While climbing through FL188 with climb checklist in progress to assigned altitude of FL190, ZME issued a clearance to descend to a lower altitude at pilot discretion. The new altitude was entered into the altitude alerter and autoplt did not capture FL190. The aircraft climbed slightly above FL190 before it was leveled off and returned to FL190. Supplemental information from acn 397629: at an altitude of approximately FL188 with climb checklist in progress, while climbing to assigned altitude of FL190, center issued a lower altitude to descend to at pilot's discretion. The new altitude was dialed into the altitude alerter and the autoplt did not capture FL190 resulting in the aircraft climbing slightly above the assigned altitude. The aircraft momentarily exceeded FL190, but was quickly leveled off at assigned altitude.
Original NASA ASRS Text
Title: A B727 CLBING TO FL190 IN ZME AIRSPACE CLBS ABOVE ITS ASSIGNED ALT WHEN GIVEN A DSCNT CLRNC.
Narrative: WHILE CLBING THROUGH FL188 WITH CLB CHKLIST IN PROGRESS TO ASSIGNED ALT OF FL190, ZME ISSUED A CLRNC TO DSND TO A LOWER ALT AT PLT DISCRETION. THE NEW ALT WAS ENTERED INTO THE ALT ALERTER AND AUTOPLT DID NOT CAPTURE FL190. THE ACFT CLBED SLIGHTLY ABOVE FL190 BEFORE IT WAS LEVELED OFF AND RETURNED TO FL190. SUPPLEMENTAL INFO FROM ACN 397629: AT AN ALT OF APPROX FL188 WITH CLB CHKLIST IN PROGRESS, WHILE CLBING TO ASSIGNED ALT OF FL190, CTR ISSUED A LOWER ALT TO DSND TO AT PLT'S DISCRETION. THE NEW ALT WAS DIALED INTO THE ALT ALERTER AND THE AUTOPLT DID NOT CAPTURE FL190 RESULTING IN THE ACFT CLBING SLIGHTLY ABOVE THE ASSIGNED ALT. THE ACFT MOMENTARILY EXCEEDED FL190, BUT WAS QUICKLY LEVELED OFF AT ASSIGNED ALT.
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.