EASA SIB SAIB-2026-16
Elevator Control System
Summary
Special Airworthiness Information Bulletin SAIB: 2026-16 is an FAA information bulletin addressing potential corrosion issues in the elevator torque shafts of Textron Aviation Inc. Model 99 series, King Air, and Airliner airplanes. The bulletin highlights corrosion found inside elevator torque shafts, particularly in models such as the King Air A100 manufactured in 1977, and provides guidance for inspection and maintenance.
What Changed
SAIB: 2026-16 introduces awareness of corrosion risks in elevator torque shafts of specific Textron Aviation Inc. aircraft models and recommends inspections and replacements as per Beechcraft Mandatory Service Letter MTL-27-03. It does not mandate regulatory action but advises voluntary inspections and reporting of findings to the FAA.
Why It Matters
This bulletin is important for aviation professionals because corrosion in elevator torque shafts can compromise flight control integrity, potentially affecting aircraft safety. Operators, maintenance organizations, and compliance teams need to be aware of this issue to prevent unexpected failures and ensure continued airworthiness of affected aircraft.
What To Do
Owners, operators, and maintenance technicians should inspect and replace elevator torque shaft assemblies following Beechcraft Mandatory Service Letter MTL-27-03 dated June 6, 2023. Any cracked, corroded, or damaged assemblies found should be reported to the FAA via email with detailed aircraft information and photographs. There is no mandatory compliance deadline stated.
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