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After receiving an ATC vector and advisory concerning the approach to expect, a B727-200 flight crew inadvertently descended through their assigned altitude. At 400 ft below the assigned altitude, the crew recognized the mistake and corrected. The approach controller did not comment, but immediately cleared the crew for a lower altitude.
| Attributes | |
| ACN | 338690 |
| Time | |
| Date | 199606 |
| Day | Fri |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : fll |
| State Reference | FL |
| Altitude | msl bound lower : 10600 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : mia artcc : eggx |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent 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 |
| Experience | flight time last 90 days : 150 flight time total : 5500 flight time type : 200 |
| ASRS Report | 338690 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 100 flight time total : 7000 flight time type : 500 |
| ASRS Report | 338462 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Approaching assigned leveloff altitude of 11000 ft MSL, controller assigned heading of 180 degrees and 'expect ILS runway 9L approach.' first officer, flying the aircraft, may have anticipated lower altitude call, allowed the aircraft to descend below 11000 ft to 10600 ft, and then initiated an immediate correction to 11000 ft MSL. No other conflicting traffic or traffic of any description was present, nor did miami approach controller comment. We were immediately cleared to 2000 ft MSL for ILS approach runway 9L for an onboard equipment check. Arrival uneventful. Fatigue due to time of night positively played a role in this deviation, and the slower recognition and reaction time by crew when noticing this deviation.
Original NASA ASRS Text
Title: AFTER RECEIVING AN ATC VECTOR AND ADVISORY CONCERNING THE APCH TO EXPECT, A B727-200 FLC INADVERTENTLY DSNDED THROUGH THEIR ASSIGNED ALT. AT 400 FT BELOW THE ASSIGNED ALT, THE CREW RECOGNIZED THE MISTAKE AND CORRECTED. THE APCH CTLR DID NOT COMMENT, BUT IMMEDIATELY CLRED THE CREW FOR A LOWER ALT.
Narrative: APCHING ASSIGNED LEVELOFF ALT OF 11000 FT MSL, CTLR ASSIGNED HDG OF 180 DEGS AND 'EXPECT ILS RWY 9L APCH.' FO, FLYING THE ACFT, MAY HAVE ANTICIPATED LOWER ALT CALL, ALLOWED THE ACFT TO DSND BELOW 11000 FT TO 10600 FT, AND THEN INITIATED AN IMMEDIATE CORRECTION TO 11000 FT MSL. NO OTHER CONFLICTING TFC OR TFC OF ANY DESCRIPTION WAS PRESENT, NOR DID MIAMI APCH CTLR COMMENT. WE WERE IMMEDIATELY CLRED TO 2000 FT MSL FOR ILS APCH RWY 9L FOR AN ONBOARD EQUIP CHK. ARR UNEVENTFUL. FATIGUE DUE TO TIME OF NIGHT POSITIVELY PLAYED A ROLE IN THIS DEV, AND THE SLOWER RECOGNITION AND REACTION TIME BY CREW WHEN NOTICING THIS DEV.
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.