EASA SIB CE-18-25: Piper PA-28-140 Aeroplanes - Throttle Control Arm Clearance

What to do

Operators of Piper PA-28-140 airplanes with the Power Flow Systems STC SA02168AT kit should visually inspect the throttle control arm clearance with the engine off and the throttle lever fully forward. They must confirm that the throttle control arm bracket does not contact the collector assembly and verify that the throttle arm reaches the maximum power stop on the carburetor following applicable rigging procedures. No specific compliance deadline is provided, but timely inspection is recommended.

Summary

The Special Airworthiness Information Bulletin SAIB: CE-18-25 is an FAA informational bulletin addressing a throttle control arm clearance issue on Piper PA-28-140 airplanes equipped with the Power Flow Systems, Inc. Supplemental Type Certificate SA02168AT kit. The bulletin highlights a potential interference between the carburetor throttle control arm bracket and the exhaust collector assembly, which may prevent the engine from reaching full throttle power. This bulletin is intended to alert owners, operators, and maintenance personnel about this concern without mandating regulatory action.

What changed

This bulletin introduces awareness of an airworthiness concern involving the throttle control arm bracket contacting the exhaust collector heat shield on Piper PA-28-140 airplanes with the Power Flow Systems STC SA02168AT installed. It does not impose new regulatory requirements but provides recommendations for inspection and verification to prevent engine power reduction. No airworthiness directive has been issued as this is not currently considered an unsafe condition warranting mandatory action.

Why it matters

This information is critical for aviation professionals to prevent potential engine power loss caused by mechanical interference in the throttle control system. Operators and maintenance teams need to be aware of this issue to ensure proper throttle arm clearance and full engine power capability. Addressing this concern proactively can help avoid power reduction incidents and enhance flight safety for affected Piper PA-28-140 aircraft.