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An MD88 flight crew delays their descent when the first officer PF fails to monitor aircraft performance after data entry into FMC.
| Attributes | |
| ACN | 424360 |
| Time | |
| Date | 199901 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : rmg |
| State Reference | GA |
| Altitude | msl bound lower : 29000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : fat |
| Operator | common carrier : air carrier |
| Make Model Name | MD-88 |
| Navigation In Use | Other |
| Flight Phase | cruise other other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer |
| Experience | flight time last 90 days : 180 flight time total : 4000 flight time type : 700 |
| ASRS Report | 424360 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : undershoot other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Center controller said, 'descend and maintain FL290 for traffic.' the captain read back, 'air carrier X, FL330 for FL290.' I entered the new altitude in the FMS and pushed the VNAV button to initiate the descent. A few mins later, center asked, 'air carrier X, are you descending to FL290?' we were still level at FL330. I then made an expeditious descent to FL290. I was in conversation with the captain and failed to verify that the aircraft had entered the descent. It is fairly common for the MD88 autoflt system to not respond to inputs on the first try, so increased vigilance is necessary.
Original NASA ASRS Text
Title: AN MD88 FLC DELAYS THEIR DSCNT WHEN THE FO PF FAILS TO MONITOR ACFT PERFORMANCE AFTER DATA ENTRY INTO FMC.
Narrative: CTR CTLR SAID, 'DSND AND MAINTAIN FL290 FOR TFC.' THE CAPT READ BACK, 'ACR X, FL330 FOR FL290.' I ENTERED THE NEW ALT IN THE FMS AND PUSHED THE VNAV BUTTON TO INITIATE THE DSCNT. A FEW MINS LATER, CTR ASKED, 'ACR X, ARE YOU DSNDING TO FL290?' WE WERE STILL LEVEL AT FL330. I THEN MADE AN EXPEDITIOUS DSCNT TO FL290. I WAS IN CONVERSATION WITH THE CAPT AND FAILED TO VERIFY THAT THE ACFT HAD ENTERED THE DSCNT. IT IS FAIRLY COMMON FOR THE MD88 AUTOFLT SYS TO NOT RESPOND TO INPUTS ON THE FIRST TRY, SO INCREASED VIGILANCE IS NECESSARY.
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.