EASA SIB SAIB-2026-01: Pitot/Static Anti-Ice System

What to do

Owners and operators of affected Boeing 737-200/-300/-400/-500 airplanes should incorporate the updated Dispatch Deviation Guide and Airplane Maintenance Manual tasks as recommended. They should also review and apply the forthcoming Boeing service bulletin that addresses the electrical isolation fix. For further guidance, operators can consult the Boeing Fleet Team Digest 737-FTD-30-22001.

Summary

The Special Airworthiness Information Bulletin SAIB: 2026-01 is an FAA advisory concerning The Boeing Company Model 737-200/-300/-400/-500 airplanes. It informs operators about a potential issue where air data probe heaters may remain powered on while the aircraft is on the ground, which could pose a burn risk to maintenance personnel. This bulletin does not mandate corrective action but provides important safety information.

What changed

This bulletin highlights reports of probe heaters staying on after engine shutdown due to an electrical connection issue linked to Boeing Alert Service Bulletin 737-30A1064 and a Thrust Reverser Sleeve Disagree fault. Boeing has updated the Dispatch Deviation Guide and Airplane Maintenance Manual to include caution notes and instructions to remove power before maintenance. Additionally, Boeing plans to issue a new service bulletin to install blocking diodes isolating the Engine Accessory Unit from probe heat relays.

Why it matters

This information is critical for aviation professionals because unexpected probe heater operation can cause burn injuries during maintenance, posing a safety hazard. Operators and maintenance teams need to be aware of this issue to ensure safe handling of air data probes and to prevent potential damage or injury. Understanding this condition helps maintain aircraft safety and operational reliability.

What to do

Summary

What changed

Why it matters

More for Boeing 737