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Atlas / NTSB / ANC92LA032

NTSB CAROL · Event

Event ANC92LA032

1992-02-04 METLAKATLA, Alaska, United States Airport · MTM None 1 aircraft Status: Completed

Aircraft involved

Probable cause & findings

TOTAL FAILURE OF THE RIVETS ATTACHING THE TRIM TAB CONTROL HORN TO THE RIGHT ELEVATOR TRIM TAB.

Factual narrative

WHILE ON FINAL APPROACH FOR LANDING, THE PILOT REPORTED THAT THE AIRPLANE'S CONTROL YOKE STARTED VIBRATING AND THE NOSE OF THE AIRPLANE PITCHED DOWN. THE PILOT CORRECTED BY RE-TRIMMING THE AIRPLANE AND LANDED WITHOUT FURTHER INCIDENT. POST-ACCIDENT INSPECTION REVEALED THAT THE RIVETS ATTACHING THE TRIM TAB CONTROL HORN TO THE RIGHT ELEVATOR TRIM TAB HAD PULLED OUT, ALLOWING THE TRIM TAB AND ELEVATOR TO FLUTTER. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1992_ANC92LA032.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.