EASA SIB NM-17-09: Boeing 767 Aeroplanes - Inboard Spoiler Power Control Actuators

What to do

Owners and operators of affected Boeing 767 airplanes should incorporate the inspection and maintenance procedures outlined in Boeing Alert Service Bulletin 767-27A0236 and the updated Boeing 767 Aircraft Maintenance Manual. Inspections should focus on detecting damage and leakage in inboard spoiler PCAs, especially when lock collars are used. There are no mandatory compliance deadlines stated, but timely adoption of these procedures is recommended.

Summary

The FAA Special Airworthiness Information Bulletin SAIB: NM-17-09 provides information for owners and operators of Boeing 767-200, -300, -300F, and -400ER series airplanes regarding inspection and maintenance procedural changes for certain inboard spoiler power control actuators (PCAs). This bulletin addresses a hydraulic fluid leakage issue linked to specific inboard spoiler PCAs on Model 767 airplanes with line numbers 1 through 1108. The document is informational and does not mandate regulatory action.

What changed

The bulletin introduces updated inspection and maintenance procedures for inboard spoiler PCAs to prevent hydraulic fluid leakage. Boeing has issued Alert Service Bulletin 767-27A0236 and revised the Boeing 767 Aircraft Maintenance Manual Section 27-61-00 to include these procedural changes. These updates focus on preventing damage caused by improper use of tooling during maintenance.

Why it matters

This information is critical for aviation professionals to avoid hydraulic system failures caused by leaking inboard spoiler PCAs, which can lead to loss of hydraulic fluid and affect flight control systems. Operators and maintenance teams must be aware of the correct procedures to prevent damage during maintenance and ensure continued airworthiness. Compliance with these recommendations helps maintain safety and reliability of affected Boeing 767 aircraft.