STC SA5824NM

This Certificate issued to Horizon Instruments, Inc.

600 S. Jefferson St., Unit C Placentia, CA 92870 Part 3 of the Civil Air Regulations.

Including Amendments 3-8 and FAR 23 Amendment 23-41 Original Product Type Certificate Number :

5A6 Cessna 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 180J, 180K Description of Type Design Change: Installation of an Engine Electronic Digital Tachometer, Horizon Model P-1000, P/N P100051- (Applicability Table on continuation sheet) in Cessna 180 series aircraft, in accordance with Horizon Instruments, Inc. Master Drawing List No. P100051, Rev. N/C, dated March 12, 1992, or later FAA approved revision.

Horizon Airplane Flight Manual Supplement No. 1, dated August 12, 1992, or later approved revision is required.

Limitations and Conditions: The installation should not be incorporated in any aircraft unless it is determined that the interrelationship between this installation and any previously approved configuration will not introduce any adverse effect upon the airworthiness of the aircraft. The approval of this modification applies to the above noted airplane model series only. A copy of this STC must be included in the permanent records of the modified aircraft. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of application : April 8, 1991

Date of issuance : August 28, 1992

Date reissued : January 14, 2002

( Signature) Manager, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office ( Title)

Number SA5824NM

Applicability Table

Aircraft Model Year Serial Numbers Horizon Tachometer P/N

180 1953 P100051-182 180 1954 30640 – 30265 P100051-182 180 1954 30266 - 31260 P100051-143 180 1955 P100051-184 180 1956 P100051-143 180A 1957 P100051-143 180A 1958 P100051-143 180B 1959 P100051-143 180C 1960 P100051-143 180D 1961 P100051-143 180E 1962 P100051-143 180F 1963 P100051-143 180G 1964 P100051-143 180H 1965 P100051-143 180H 1966 P100051-143 180H 1967 P100051-143 180H 1968 P100051-143 180H 1969 P100051-143 180H 1970 P100051-143 180H 1971 P100051-143 180H 1972 P100051-143 180J 1973 P100051-143 180J 1974 P100051-143 180J 1975 P100051-143 180J 1976 P100051-143 180K 1977 P100051-145 180K 1978 P100051-145 180K 1979 P100051-145 180K 1980 P100051-145 180K 1981 P100051-145

-END-