SNOHOMISH, WA, USA
N3314T
CESSNA 177
DURING CRUISE A PARTIAL POWER LOSS OCCURRED AND THE PILOT, UNABLE TO REACH A SUITABLE AIRPORT, EXECUTED A FORCED LANDING. POST CRASH EXAMINATION REVEALED THAT THE MIXTURE CONTROL CABLE CORE HAD SEPARATED AT THE MIXTURE CONTROL ARM BOLT ADJACENT TO THE CARBURETOR. ADDITIONALLY, THE ADEL CLAMP ASSEMBLY RETAINING THE MIXTURE CONTROL CABLE NEAR THE MIXTURE CONTROL ARM WAS OBSERVED TO BE SEPARATED. THE SEPARATED CABLE CORE WAS DUE TO REVERSE BENDING FATIGUE CRACKING CONSISTENT WITH EXCESSIVE VIBRATORY LOADS APPLIED TO THE CABLE AS A RESULT OF THE SEPARATED ADEL CLAMP ASSEMBLY. THE SEPARATED ADEL CLAMP WAS DUE TO EXCESSIVE TWISTING LOADS APPLIED TO THE CLAMP. DURING THE FORCED LANDING ROLLOUT, WHICH WAS EXECUTED ON ROUGH TERRAIN, THE NOSE WHEEL ASSEMBLY COLLAPSED.
THE SEPARATION OF THE MIXTURE CONTROL CABLE (CORE) RESULTING FROM SEPARATION OF THE ADEL CLAMP ASSEMBLY AND IMPROPER ADJUSTMENT BY MAINTENANCE PERSONNEL.
Source: NTSB Aviation Accident Database
Aviation Accidents App
In-Depth Access to Aviation Accident Reports
