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An air carrier B727 crew descended below its assigned altitude using vector navigation for a visual approach.
| Attributes | |
| ACN | 355717 |
| Time | |
| Date | 199612 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : atl |
| State Reference | GA |
| Altitude | msl bound lower : 6200 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : atl |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 14000 flight time type : 3000 |
| ASRS Report | 355717 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 5000 flight time type : 550 |
| ASRS Report | 355718 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : overshoot altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : became reoriented flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Cleared to descend from 12000 ft to 7000 ft on downwind heading east, following a heavy L1011. Visual conditions. Altitude alerting system inoperative on mco. Captain was working radios and watching traffic ahead at 3500 ft. First officer flying. So called out 'altitude,' as we passed 6200 ft. First officer made immediate correction back to 7000 ft. Captain had not called '1000 ft to go.' no traffic conflicts resulted.
Original NASA ASRS Text
Title: AN ACR B727 CREW DSNDED BELOW ITS ASSIGNED ALT USING VECTOR NAV FOR A VISUAL APCH.
Narrative: CLRED TO DSND FROM 12000 FT TO 7000 FT ON DOWNWIND HDG E, FOLLOWING A HVY L1011. VISUAL CONDITIONS. ALT ALERTING SYS INOP ON MCO. CAPT WAS WORKING RADIOS AND WATCHING TFC AHEAD AT 3500 FT. FO FLYING. SO CALLED OUT 'ALT,' AS WE PASSED 6200 FT. FO MADE IMMEDIATE CORRECTION BACK TO 7000 FT. CAPT HAD NOT CALLED '1000 FT TO GO.' NO TFC CONFLICTS RESULTED.
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.