What was found
VERY SIGNIFICANT HARMONIC-VIBRATION BEING TRANSMITTED THRU FLAP HANDLE AS FLAPS APPROACH 5. REPLACED FLAP-SLAT SHUTOFF VALVE MODULE, MODULE INSTALLATION TEST CKS OK, NO LEAKS, NO VIBRATION FELT DURING SEVERAL FLAP EXTENSION CYCLES.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
VERY SIGNIFICANT HARMONIC-VIBRATION BEING TRANSMITTED THRU FLAP HANDLE AS FLAPS APPROACH 5. REPLACED FLAP-SLAT SHUTOFF VALVE MODULE, MODULE INSTALLATION TEST CKS OK, NO LEAKS, NO VIBRATION FELT DURING SEVERAL FLAP EXTENSION CYCLES.