- Effective
- January 16, 1969
- Models
- GO-435-C2 (O-435-17), GO-435-C2A, GO-435-C2A2, GO-435-C2B, GO-435-C2B1, GO-435-C2B2 and 314 more
- Registered aircraft
- 78,699 matched by model
- Product
- Engine
- Amendment
- 39-708
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 20 KB | f82988ee…ffc4bab | FAA DRS (API key needed) |
On this page
The airworthiness directive
66-06-03 LYCOMING: Amdt. 39-708. Applies to Model IO-360-A1A Engines with Serial Numbers 101-51 through 1231-51A, and All Engines Remanufactured by Lycoming Prior to December 1, 1964.
Compliance required as indicated.
To prevent further failures of connecting rod assemblies, P/N 74503 and P/N 74308, accomplish the following:
(a) Replace connecting rod assemblies P/N 74503 and P/N 74308 with 200 or more hours' time in service on the effective date of this AD with connecting rod assembly P/N 75059 within the next 50 hours' time in service in accordance with Lycoming Service Bulletin No. 302 or later FAA-approved revision.
(b) Replace connecting rod assemblies P/N 74503 and P/N 74308 with less than 200 hours' time in service on the effective date of this AD with connecting rod assembly P/N 75059 before the accumulation of 250 hours' time in service in accordance with Lycoming Service Bulletin No. 302 or later FAA-approved revision.
Effective March 13, 1966.Revised January 16, 1969.
Affected TCDS · 42
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 78,699
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1910 | 1 |
|---|---|
| 1924 | 1 |
| 1926 | 1 |
| 1927 | 2 |
| 1928 | 9 |
| 1929 | 11 |
| 1930 | 15 |
| 1931 | 20 |
| 1932 | 1 |
| 1933 | 4 |
| 1934 | 4 |
| 1935 | 3 |
| 1936 | 15 |
| 1937 | 20 |
| 1938 | 16 |
| 1939 | 62 |
| 1940 | 185 |
| 1941 | 190 |
| 1942 | 65 |
| 1943 | 112 |
| 1944 | 42 |
| 1945 | 25 |
| 1946 | 598 |
| 1947 | 648 |
| 1948 | 200 |
| 1949 | 255 |
| 1950 | 268 |
| 1951 | 249 |
| 1952 | 262 |
| 1953 | 446 |
| 1954 | 325 |
| 1955 | 463 |
| 1956 | 554 |
| 1957 | 604 |
| 1958 | 743 |
| 1959 | 907 |
| 1960 | 723 |
| 1961 | 918 |
| 1962 | 859 |
| 1963 | 1,071 |
| 1964 | 1,427 |
| 1965 | 1,748 |
| 1966 | 2,352 |
| 1967 | 2,378 |
| 1968 | 2,850 |
| 1969 | 2,385 |
| 1970 | 1,165 |
| 1971 | 1,396 |
| 1972 | 1,871 |
| 1973 | 2,382 |
| 1974 | 2,625 |
| 1975 | 2,566 |
| 1976 | 3,033 |
| 1977 | 3,141 |
| 1978 | 4,050 |
| 1979 | 3,115 |
| 1980 | 1,521 |
| 1981 | 1,425 |
| 1982 | 643 |
| 1983 | 403 |
| 1984 | 420 |
| 1985 | 382 |
| 1986 | 183 |
| 1987 | 182 |
| 1988 | 190 |
| 1989 | 320 |
| 1990 | 284 |
| 1991 | 313 |
| 1992 | 278 |
| 1993 | 333 |
| 1994 | 317 |
| 1995 | 357 |
| 1996 | 401 |
| 1997 | 525 |
| 1998 | 889 |
| 1999 | 1,021 |
| 2000 | 1,030 |
| 2001 | 864 |
| 2002 | 697 |
| 2003 | 819 |
| 2004 | 937 |
| 2005 | 917 |
| 2006 | 329 |
| 2007 | 268 |
| 2008 | 231 |
| 2009 | 202 |
| 2010 | 199 |
| 2011 | 181 |
| 2012 | 190 |
| 2013 | 140 |
| 2014 | 129 |
| 2015 | 104 |
| 2016 | 128 |
| 2017 | 114 |
| 2018 | 120 |
| 2019 | 117 |
| 2020 | 127 |
| 2021 | 112 |
| 2022 | 96 |
| 2023 | 115 |
| 2024 | 110 |
| 2025 | 90 |
| 2026 | 50 |
10,515 with no year recorded