Description of Industries and Summary of Findings INDUSTRY 3721, AIRCRAFT This industry is made up of establishments primarily engaged in manufacturing or assembling complete aircraft. This industry also includes establishments owned by aircraft manufacturers and primarily engaged in research and development on aircraft, whether from enterprise funds or on a contract or fee basis. Also included are establishments engaged in repairing and rebuilding aircraft on a factory basis. Establishments primarily engaged in manufacturing engines and other aircraft parts and auxiliary equipment are classified in industry 3724 and 3728; and those manufacturing guided missiles and space vehicles and parts are classified in industry group 376. Establishments primarily engaged in the repair of aircraft, except on a factory basis, are classified in transportation, industry 4581; and research and development on aircraft by establishments not owned by aircraft manufacturers are classified in services, industry 8731. Products of this industry also are collected in the Current Industrial Report (CIR) M-37G, Civil Aircraft and Aircraft Engines. For information regarding the CIR, see Contacts for Data Users at the end of the Census of Manufactures section. The 1992 definition of this industry is the same as that used in the 1987 Standard Industrial Classification (SIC) system. The SIC number and title also are the same. In the 1992 Census of Manufactures, Industry 3721, Aircraft, had employment of 264.9 thousand. The employment figure was 1 percent below the 268.2 thousand reported in 1987. Compared with 1991, employment increased 3 percent. The 1991 data are based on the Census Bureau's annual survey of manufactures (ASM), which is a sample survey conducted each year between censuses. The leading States in employment in 1992 were California, Missouri, Texas, and Washington. These same States were the leaders in 1987. The total value of shipments for establishments classified in this industry was $63.0 billion. Establishments in virtually all industries ship secondary products as well as products primary to the industry in which they are classified and have some miscellaneous receipts, such as resales and contract receipts. Industry 3721 shipped $54.9 billion of aircraft products considered primary to the industry, $7.0 billion of secondary products, and had $1.1 billion of miscellaneous receipts, resales, and contract work. Thus, the ratio of primary products to the total of both secondary and primary products shipped by establishments in this industry was 89 percent (specialization ratio). In 1987, the specialization ratio was 90 percent. Establishments in this industry also accounted for 97 percent of products considered primary to the industry no matter where they were actually produced (coverage ratio). In 1987, the coverage ratio was 95 percent. The products primary to industry 3721, no matter in what industry they were produced, appear in file MC92F6A and aggregate to $56.6 billion. For further explanation of specialization and coverage ratios, see file MC92F5B and the appendixes. The total cost of materials, services, and fuels and energy used by establishments classified in the aircraft industry amounted to $36.1 billion. Data on specific materials consumed appear in file MC92F7. No establishments in this industry were excluded from the mail portion of the census. However, for a small number of establishments, reports were not received at the time the data were tabulated. For these establishments data were obtained from administrative records of other agencies or developed from industry averages. These establishments accounted for less than 1 percent of the total value of shipments. INDUSTRY 3724, AIRCRAFT ENGINES AND ENGINE PARTS This industry is made up of establishments primarily engaged in manufacturing aircraft engines and engine parts. This industry also includes establishments owned by aircraft engine manufacturers and primarily engaged in research and development on aircraft engines and engine parts whether from enterprise funds or on a contract or fee basis. Also included are establishments engaged in repairing and rebuilding aircraft engines on a factory basis. Establishments primarily engaged in manufacturing guided missile and space vehicle propulsion units and parts are classified in industry 3764; those manufacturing aircraft intake and exhaust valves and pistons are classified in industry 3592; and those manufacturing aircraft internal combustion engine filters are classified in industry 3714. Establishments primarily engaged in the repair of aircraft engines, except on a factory basis, are classified in transportation, industry 4581; and research and development on aircraft engines on a contract or fee basis by establishments not owned by aircraft engine manufacturers are classified in services, industry 8731. Products of this industry also are collected in the Current Industrial Report (CIR) M-37G, Civil Aircraft and Aircraft Engines. For information regarding the CIR, see Contacts for Data Users at the end of the Census of Manufactures section. The 1992 definition of this industry is the same as that used in the 1987 Standard Industrial Classification (SIC) system. The SIC number and title also are the same. In the 1992 Census of Manufactures, Industry 3724, Aircraft Engines and Engine Parts, had employment of 116.7 thousand. The employment figure was 16 percent below the 139.6 thousand reported in 1987. Compared with 1991, employment decreased 5 percent. The 1991 data are based on the Census Bureau's annual survey of manufactures (ASM), which is a sample survey conducted each year between censuses. The leading States in employment in 1992 were Connecticut, Florida, Indiana, and Ohio. This represents a shift from 1987 when Connecticut, Ohio, Massachusetts, and Florida were the leading States. The total value of shipments for establishments classified in this industry was $22.0 billion. Establishments in virtually all industries ship secondary products as well as products primary to the industry in which they are classified and have some miscellaneous receipts, such as resales and contract receipts. Industry 3724 shipped $19.5 billion of aircraft engines and engine parts considered primary to the industry, $1.2 billion of secondary products, and had $1.2 billion of miscellaneous receipts, resales, and contract work. Thus, the ratio of primary products to the total of both secondary and primary products shipped by establishments in this industry was 94 percent (specialization ratio). In 1987, the specialization ratio was 92 percent. Establishments in this industry also accounted for 95 percent of products considered primary to the industry no matter where they were actually produced (coverage ratio). In 1987, the coverage ratio was 94 percent. The products primary to industry 3724, no matter in what industry they were produced, appear in file MC92F6A and aggregate to $20.6 billion. For further explanation of specialization and coverage ratios, see file MC92F5B and the appendixes. The total cost of materials, services, and fuels and energy used by establishments classified in the aircraft engines and engine parts industry amounted to $9.0 billion. Data on specific materials consumed appear in file MC92F7. Single-establishment companies in this industry with less than 10 employees were excluded from the mail portion of the census. The data for these establishments (and a small number of larger establishments whose reports were not received at the time the data were tabulated) were obtained from administrative records of other agencies or developed from industry averages. These establishments accounted for 2 percent of the total value of shipments. INDUSTRY 3728, AIRCRAFT PARTS AND EQUIPMENT, N.E.C. This industry is made up of establishments primarily engaged in manufacturing aircraft parts and auxiliary equipment, not elsewhere classified. This industry also includes establishments owned by manufacturers of aircraft parts and auxiliary equipment and primarily engaged in research and development on aircraft parts, whether from enterprise funds or on a contract or fee basis. Establishments primarily engaged in manufacturing or assembling complete aircraft are classified in industry 3721; those manufacturing aircraft engines and parts are classified in industry 3724; those manufacturing aeronautical instruments are classified in industry 3812; those manufacturing aircraft engine electrical (aeronautical electrical) equipment are classified in industry 3694; and those manufacturing guided missile and space vehicle parts and auxiliary equipment are classified in industry 3769. Establishments not owned by manufacturers of aircraft parts but primarily engaged in research and development on aircraft parts on a contract or fee basis are classified in services, industry 8731. The 1992 definition of this industry is the same as that used in the 1987 Standard Industrial Classification (SIC) system. The SIC number and title also are the same. In the 1992 Census of Manufactures, Industry 3728, Aircraft Parts and Equipment, N.E.C., had employment of 165.3 thousand. The employment figure was 12 percent below the 188.2 thousand reported in 1987. Compared with 1991, employment decreased 12 percent. The 1991 data are based on the Census Bureau's annual survey of manufactures (ASM), which is a sample survey conducted each year between censuses. The leading States in employment in 1992 were California, Connecticut, Kansas, and Texas. These same States were the leaders in 1987. The total value of shipments for establishments classified in this industry was $19.8 billion. Establishments in virtually all industries ship secondary products as well as products primary to the industry in which they are classified and have some miscellaneous receipts, such as resales and contract receipts. Industry 3728 shipped $16.5 billion of aircraft parts and equipment, not elsewhere classified products considered primary to the industry, $2.9 billion of secondary products, and had $505.8 million of miscellaneous receipts, resales, and contract work. Thus, the ratio of primary products to the total of both secondary and primary products shipped by establishments in this industry was 85 percent (specialization ratio). In 1987, the specialization ratio was 82 percent. Establishments in this industry also accounted for 74 percent of products considered primary to the industry no matter where they were actually produced (coverage ratio). In 1987, the coverage ratio was 71 percent. The products primary to industry 3728, no matter in what industry they were produced, appear in file MC92F6A and aggregate to $22.1 billion. For further explanation of specialization and coverage ratios, see file MC92F5B and the appendixes. The total cost of materials, services, and fuels and energy used by establishments classified in the aircraft parts and equipment, not elsewhere classified, industry amounted to $6.1 billion. Data on specific materials consumed appear in file MC92F7. Single-establishment companies in this industry with less than 10 employees were excluded from the mail portion of the census. The data for these establishments (and a small number of larger establishments whose reports were not received at the time the data were tabulated) were obtained from administrative records of other agencies or developed from industry averages. These establishments accounted for 4 percent of the total value of shipments.