Recommends Procedures For Inspection Of Nuts And Bolts Through The Rear Spar
The FAA has released a Special Airworthiness Information Bulletin (SAIB) for Air Tractor, Inc. Models AT-401B, AT-402B, AT-502A, AT-502B, AT-504, AT-602, AT-802, and AT-802A having serial numbers prior to 401B/402B-1347, 502A/502B-3059, 504-4029, 602-1278, and 802/802A-0661 airplanes (under Type Certificate Data Sheets A17SW and A19SW)