- Effective
- July 23, 1973
- Model
- HIO-360-D1A
- Data sheet
- TCDS1E10
- Registered aircraft
- 431 matched by model
- Product
- Engine
- Amendment
- 39-1689
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 | 19 KB | 126e85fa…072ca8d | FAA DRS (API key needed) |
On this page
The airworthiness directive
73-15-04 AVCO LYCOMING: Amdt. 39-1689. Applies to HIO-360-D1A model engines installed on Hughes Models 269C and 300C helicopters. Compliance required within 300 hours time in service after the effective date of this AD and every 300 hours in service thereafter. To prevent possible failures of the Bendix part numbers 10-349235-3 and 10-349235-4 magnetos, replace the part number 10-391315 rubber drive plate grommet in accordance with Lycoming Service Bulletin No. 364 or equivalent procedure approved by Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. This amendment is effective July 23, 1973.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 431
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1946 | 2 |
|---|---|
| 1959 | 1 |
| 1963 | 2 |
| 1964 | 3 |
| 1965 | 7 |
| 1966 | 9 |
| 1967 | 7 |
| 1968 | 12 |
| 1969 | 5 |
| 1970 | 1 |
| 1971 | 4 |
| 1972 | 3 |
| 1973 | 3 |
| 1974 | 4 |
| 1975 | 1 |
| 1976 | 9 |
| 1977 | 23 |
| 1978 | 18 |
| 1979 | 10 |
| 1980 | 11 |
| 1981 | 15 |
| 1982 | 9 |
| 1983 | 3 |
| 1984 | 2 |
| 1985 | 7 |
| 1986 | 5 |
| 1987 | 8 |
| 1988 | 9 |
| 1989 | 7 |
| 1990 | 6 |
| 1991 | 8 |
| 1992 | 9 |
| 1993 | 4 |
| 1994 | 7 |
| 1995 | 4 |
| 1996 | 7 |
| 1997 | 8 |
| 1998 | 6 |
| 1999 | 6 |
| 2000 | 2 |
| 2001 | 7 |
| 2002 | 9 |
| 2003 | 5 |
| 2004 | 5 |
| 2005 | 18 |
| 2006 | 5 |
| 2007 | 3 |
| 2008 | 7 |
| 2009 | 4 |
| 2010 | 3 |
| 2016 | 1 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 1 |
94 with no year recorded