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Who holds what · as the FAA records the name

Leth & Associates

Named as the FAA publishes it on its approvals.

Holds 5 approved modifications, most of them for the Douglas DC-8. FAA spelling: Leth & Associates.

Approved modifications 5 · newest first

Douglas DC-8 2Boeing 727 2Boeing 757 1
2014-12-19ST01857SE · Increase of the Maximum Zero Fuel Weight · 757-200 Series
2002-07-16SA3437NM · Modification to permit an increase in maximum allowable zero fuel weight of DC-8-62 airplanes, (1) which are... · DC-8-62
1994-05-31ST00094SE · Increase in the maximum zero fuel weight. · 727-200 Series
1990-03-27SA4912NM · Increase in the maximum zero fuel weight. · 727-100 Series
1990-03-01SA4844NM · Modification in accordance with FAA-approved data to permit an increase in maximum landing weight above 2,000 ft. · DC-8-63

Source: FAA Dynamic Regulatory System (type certificate data sheets, supplemental type certificates, parts manufacturer approvals, technical standard order authorisations). An organisation's name is as the FAA spelled it on each record; related spellings are separate pages.