Cessna 414A and 421C, if modified by S-TEC Corporation STC - Flight Control System
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators should inspect rudder trim tab blocks and flight control cables following S-TEC Service Bulletin 11-001R2. If trim tab blocks are improperly located, they must be repositioned per the STC or FAA-approved methods. Additionally, installations should be modified to include pulleys that prevent cable wear as specified in the updated STCs.
Summary
The FAA Special Airworthiness Information Bulletin SAIB: CE-11-29R1 addresses flight control system concerns for Cessna 414A and 421C aircraft modified by S-TEC Corporation Supplemental Type Certificates SA08996AC-D, SA7787SW-D, and SA7790SW-D with optional trim installed. The bulletin provides guidance on inspecting rudder trim tab blocks and phenolic blocks along the flight control system to prevent wear and ensure proper rudder travel. This information bulletin is advisory and does not mandate regulatory action.
What changed
This revised SAIB updates guidance to incorporate changes from S-TEC Service Bulletin 11-001R2 and removes references to potential similar actions by Cessna. It notifies operators that the S-TEC STCs have been revised to include pulley installations to reduce cable wear and correct rudder trim tab block placement to ensure full rudder travel.
Why it matters
Proper inspection and modification of the flight control system are critical to maintaining aircraft safety and control effectiveness. Operators and maintenance personnel must be aware of potential wear points and improper installations that could limit rudder travel, affecting aircraft handling. Following the updated guidance helps prevent premature component wear and ensures compliance with the latest approved configurations.
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