EASA SIB NM-14-05
Beechcraft (formerly Hawker Beechcraft, Raytheon, British Aerospace) BAe.125 and Hawker Series — Wing/Aileron Oscillations
Summary
The Special Airworthiness Information Bulletin SAIB: NM-14-05 is an FAA informational bulletin addressing wing and aileron oscillations in Beechcraft BAe.125 Series 800A, 800B, 1000A, and 1000B airplanes, as well as Hawker 750, 800, 800XP, 850XP, 900XP, and 1000 models. It highlights an airworthiness concern related to wing/aileron oscillations at high altitudes and speeds, excluding airplanes modified by Aviation Partners Inc. Supplemental Type Certificate ST01411SE.
What Changed
This bulletin introduces awareness of wing and aileron oscillations reported in certain Beechcraft and Hawker aircraft models, identifying causes such as missing aileron bushings, low cable tensions, and improperly installed brackets. It does not mandate regulatory action but recommends maintenance checks to prevent potential structural damage from oscillations.
Why It Matters
This information is critical for operators, maintenance personnel, and compliance teams to prevent wing structural fatigue and possible damage caused by oscillations during high-altitude, high-speed flight. Proper maintenance and inspection can avoid severe wing spar and stiffener cracks, ensuring continued airworthiness and flight safety.
What To Do
Operators and maintenance personnel should perform a one-time maintenance check as soon as possible to verify correct installation of aileron bushings, proper free play limits, correctly installed hinge brackets, and correct cable tensions. Regular maintenance per the existing manuals is strongly recommended, and any wing oscillation findings should be reported to the FAA at wichita-cos@faa.gov.