As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNUSUAL VIBRATION AFTER TAKE OFF. INCREASED WITH ALTITUDE AND AIRSPEED INCREASE. FELT THROUGHOUT CABIN. DECREASED WHEN WE SLOWED; UNAFFECTED BY GEAR; FLAPS; OR ENGINE CHANGES. FOR ADDITIONAL QUESTION TEXT (717) 542-8807<[01] PERFORMED AIRFRAME CONDITIONAL INSP PER AMM 05-51-67. NO DEFECTS NOTED.