- Effective
- April 30, 1975
- Models
- AIO-320-A1A, AIO-320-A1B, AIO-320-A2A, AIO-320-A2B, AIO-320-B1B, AIO-320-C1B and 127 more
- Registered aircraft
- 21,537 matched by model
- Product
- Engine
- Amendment
- 39-2187
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 | 21 KB | bc926019…9ac841f | FAA DRS (API key needed) |
On this page
The airworthiness directive
75-09-15 LYCOMING: Amendment 39-2187. Applies to Lycoming Model IO-320, AIO-320, IO-360, LIO-360, HIO-360-C Series, IVO-360, TIO-360, AIO-360, IGO-480, IO-540, TIO-540, IVO-540, IGO-540, AND IO-720 Series Engines equipped with the following listed Bendix Fuel Injector Flow Divider part numbers. 2524218-1 thru 2524225-1, 2524227-1, 2524232-1, 2524240-1, 2524248-1, 2524265-1, 2524327-1, 2524342-1, 2524397-1, 2524416-1, 2524421-1, 2524571-1, 2524583-1, 2524610-1. Compliance required within the next 25 hours' time in service after the effective date of this AD, unless already accomplished. To prevent possible fuel starvation to the engine accomplish the following: Remove Bendix P/N 2537013 fuel flow divider cover gasket and install Bendix P/N 2538998 cover gasket in accordance with Lycoming Service Bulletin No. 382 or equivalent procedure approved by Chief, Engineering & Manufacturing Branch, FAA, Eastern Region. (Bendix Energy Controls Division Fuel System Bulletin No. RS43also covers this subject). This amendment is effective April 30, 1975.
Affected TCDS · 10
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 21,537
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1929 | 1 |
|---|---|
| 1930 | 1 |
| 1937 | 1 |
| 1939 | 1 |
| 1940 | 1 |
| 1941 | 1 |
| 1943 | 1 |
| 1946 | 9 |
| 1947 | 5 |
| 1948 | 8 |
| 1949 | 2 |
| 1950 | 7 |
| 1951 | 6 |
| 1952 | 1 |
| 1953 | 4 |
| 1954 | 3 |
| 1955 | 2 |
| 1956 | 7 |
| 1957 | 3 |
| 1958 | 5 |
| 1959 | 5 |
| 1960 | 23 |
| 1961 | 36 |
| 1962 | 49 |
| 1963 | 178 |
| 1964 | 446 |
| 1965 | 523 |
| 1966 | 774 |
| 1967 | 754 |
| 1968 | 570 |
| 1969 | 696 |
| 1970 | 258 |
| 1971 | 375 |
| 1972 | 494 |
| 1973 | 640 |
| 1974 | 618 |
| 1975 | 669 |
| 1976 | 891 |
| 1977 | 865 |
| 1978 | 936 |
| 1979 | 492 |
| 1980 | 317 |
| 1981 | 327 |
| 1982 | 187 |
| 1983 | 119 |
| 1984 | 101 |
| 1985 | 64 |
| 1986 | 31 |
| 1987 | 44 |
| 1988 | 50 |
| 1989 | 105 |
| 1990 | 89 |
| 1991 | 81 |
| 1992 | 68 |
| 1993 | 107 |
| 1994 | 91 |
| 1995 | 124 |
| 1996 | 131 |
| 1997 | 236 |
| 1998 | 526 |
| 1999 | 577 |
| 2000 | 584 |
| 2001 | 438 |
| 2002 | 307 |
| 2003 | 401 |
| 2004 | 550 |
| 2005 | 574 |
| 2006 | 194 |
| 2007 | 132 |
| 2008 | 112 |
| 2009 | 89 |
| 2010 | 103 |
| 2011 | 87 |
| 2012 | 89 |
| 2013 | 62 |
| 2014 | 74 |
| 2015 | 56 |
| 2016 | 78 |
| 2017 | 86 |
| 2018 | 109 |
| 2019 | 140 |
| 2020 | 145 |
| 2021 | 129 |
| 2022 | 175 |
| 2023 | 192 |
| 2024 | 190 |
| 2025 | 208 |
| 2026 | 111 |
2,386 with no year recorded
By model
See all 93 modelsAircraft
NTSB investigations that cite this AD · 2
Their narratives or probable cause name AD 75-09-15, often to say whether the aircraft complied with it.