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An air carrier B727 freighter flight crew reports that, while intercepting the localizer, the autoplt pitched down and they lost 300 ft before they could recover. They completed the approach manually and entered the discrepancy in the logbook.
| Attributes | |
| ACN | 379940 |
| Time | |
| Date | 199709 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : cle |
| State Reference | OH |
| Altitude | msl bound lower : 2700 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : cle |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 40 flight time total : 2600 flight time type : 300 |
| ASRS Report | 379940 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : regained aircraft control flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
While on approach into cle ILS runway 23L, from outside the marker and level at 3000 ft, we turned onto the localizer. The autoplt pitched over, the autoplt pitch trim light illuminated. We lost 300 ft of altitude, disconnected the autoplt, flew manual approach. The autoplt was written up.
Original NASA ASRS Text
Title: AN ACR B727 FREIGHTER FLC RPTS THAT, WHILE INTERCEPTING THE LOC, THE AUTOPLT PITCHED DOWN AND THEY LOST 300 FT BEFORE THEY COULD RECOVER. THEY COMPLETED THE APCH MANUALLY AND ENTERED THE DISCREPANCY IN THE LOGBOOK.
Narrative: WHILE ON APCH INTO CLE ILS RWY 23L, FROM OUTSIDE THE MARKER AND LEVEL AT 3000 FT, WE TURNED ONTO THE LOC. THE AUTOPLT PITCHED OVER, THE AUTOPLT PITCH TRIM LIGHT ILLUMINATED. WE LOST 300 FT OF ALT, DISCONNECTED THE AUTOPLT, FLEW MANUAL APCH. THE AUTOPLT WAS WRITTEN UP.
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.