The FAA issued a Special Airworthiness Information Bulletin (SAIB) Number CE-16-07 of an airworthiness concern for owners and operators of Air Tractor, Inc. Models AT-802/802A airplanes that incorporate one or more of the following:

• Any serial number (S/N) in the range of 0228 through 0280;
• Any S/N and has the engine mount gusset installation made per Snow Engineering, Inc. Service Letter #253 prior to October 16, 2007;
• Any S/N and has engine mount replacements made between November 15, 2005 to December 31, 2008; and
• Any S/N and has supplemental type certificate (STC) number SA01916CH or STC number SA0175CH installed. 

 

The SAIB provides inspection procedures and on-condition maintenance actions for the engine mount for affected airplanes. The FAA believes that this airworthiness concern is not an unsafe condition that would warrant airworthiness directive (AD) action.

 

Air Tractor recently issued Snow Engineering Co. Service Letter (SL) #335 for certain Models AT-802 and AT-802A airplanes. The SL was issued after an operator reported finding the engine mount attach lug gusset cracked on one airplane. The SL provides instructions for inspecting the engine mount lug for correct orientation and inspecting the area for cracks. Air Tractor requests that you report your inspection results to the Air Tractor Service Department.

 

The SAIB recommends that affected aircraft owners inspect their aircraft using the procedures in SL #335 and report findings to Air Tractor.  

 

Please read and follow the instructions given in the SAIB. Click here to read or download the SAIB.