EASA SIB CE-12-19
Cessna 500, 501 and 550 Aeroplanes — modified by Sierra Industries STC SA80RM or SA152RM
Summary
The Special Airworthiness Information Bulletin SAIB: CE-12-19 is an FAA informational bulletin concerning Cessna Aircraft Company Models 500, 501, and 550 airplanes modified with Sierra Industries Supplemental Type Certificates SA80RM or SA152RM. It addresses updated instructions for continued airworthiness related to the auxiliary fuel tank installed by these STCs. The bulletin highlights revised maintenance and inspection procedures to prevent fuel leaks in the auxiliary fuel system.
What Changed
This bulletin introduces revised Instructions for Continued Airworthiness (ICA) documented in Sierra Industries ICA Document MMS-911, Issue 1, dated November 28, 2011. The updated ICA expands and clarifies inspection requirements, maintenance instructions, operational checks, troubleshooting procedures, and includes a fuel system schematic and wiring diagram for the auxiliary fuel tank. It replaces previous guidance that was found insufficient following fuel leak incidents.
Why It Matters
This information is important for operators and maintenance organizations to ensure the continued safe operation of Cessna 500, 501, and 550 airplanes equipped with Sierra Industries auxiliary fuel tanks. Proper adherence to the revised ICA reduces the risk of fuel leaks and potential safety hazards. Compliance with these updated maintenance instructions supports regulatory compliance and helps avoid costly repairs or operational disruptions.
What To Do
Owners and operators of affected Cessna models modified with Sierra Industries STC SA80RM or SA152RM should obtain and follow the revised ICA Document MMS-911, Issue 1, dated November 28, 2011. They should incorporate the updated inspection and maintenance procedures into their routine maintenance programs. There is no mandatory compliance deadline, but timely adoption is recommended to maintain airworthiness.