- Effective
- November 15, 1974
- Models
- 206A, 206A-1 (OH-58A), 206B, 206B-1
- Data sheet
- TCDSH2SW
- Registered aircraft
- 861 matched by model
- Product
- Aircraft · Rotorcraft
- Amendment
- 39-2011
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 | 24 KB | bbcaa0ec…bbe7194 | FAA DRS (API key needed) |
On this page
The airworthiness directive
74-24-01 BELL: Amendment 39-2011. Applies to Bell Models 206A, 206B, 206A-1 and 206B-1 helicopters certificated in all categories.
Compliance required as indicated, unless already accomplished.
To prevent possible failure of certain main rotor blade grips, conduct the following:
a. Within five hours' time in service after September 23, 1974, inspect the serial numbers of both main rotor grips and replace the following grips, P/N 206-010-102-9, before further flight:
S/N JI1-5824, JI1-5861, JI1-5875 through and including 5878; JI1-5880 through and including 5903; JI1-5906 through and including 5912; JI1-5914 through and including 5938; JI1-5940 and 5941; and JI1-5944 through and including 5953.
b. Within five hours' time in service after November 15, 1974, inspect the serial numbers of both main rotor grips and replace the following grips P/N 206-010-102-9, before further flight:
S/N JI1-5393 through and including 5413; JI1-5417; JI1-5420 through andincluding 5439; JI1-5469; JI1-5516 through and including 5519; JI1-5521 through and including 5531; JI1-5533 through and including 5544; JI1-5546 through and including 5550; JI1-5552 through and including 5587; JI1-5589 through and including 5594; JI1-5595 through and including 5632; JI1-5634 through and including 5636; JI1-5638 through and including 5642; JI1- 5644 through and including 5646; JI1-5648 through and including 5654; JI1-5656 through and including 5695; JI1-5697 through and including 5710; JI1-5712 through and including 5759; JI1 5761 through and including 5785; JI1-5787; JI1-5789 through and including 5794; JI1-5796 through and including 5803; JI1-5805 through and including 5823; JI1-5825 through and including 5860; JI1-5862 through and including 5874; JI1-5972; JI1-5993 and 5994; JI1-6045 and 6046; JI1-6160.
c. Main rotor grips that have been inspected by the manufacturer and found airworthy will be given a new serial number by Bell Helicopter Company and may be returned to service.
(Telefax messages dated September 6, and October 10, 1974 from Bell Helicopter Company to all 206 operators pertains to this subject.)
This supersedes Amendment 39-1973 (39 F.R. 33790), AD 74-20-3. This amendment becomes effective November 15, 1974.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 861
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1954 | 1 |
|---|---|
| 1966 | 1 |
| 1967 | 5 |
| 1968 | 16 |
| 1969 | 12 |
| 1970 | 7 |
| 1971 | 15 |
| 1972 | 22 |
| 1973 | 25 |
| 1974 | 39 |
| 1975 | 38 |
| 1976 | 34 |
| 1977 | 28 |
| 1978 | 40 |
| 1979 | 48 |
| 1980 | 45 |
| 1981 | 52 |
| 1982 | 27 |
| 1983 | 5 |
| 1984 | 7 |
| 1985 | 5 |
| 1986 | 5 |
| 1987 | 4 |
| 1988 | 11 |
| 1989 | 14 |
| 1990 | 7 |
| 1991 | 9 |
| 1992 | 6 |
| 1993 | 24 |
| 1994 | 38 |
| 1995 | 47 |
| 1996 | 4 |
| 1997 | 6 |
| 1998 | 5 |
| 1999 | 4 |
| 2000 | 6 |
| 2001 | 13 |
| 2002 | 7 |
| 2003 | 3 |
| 2004 | 2 |
| 2005 | 5 |
| 2006 | 6 |
| 2007 | 5 |
| 2008 | 3 |
| 2009 | 1 |
154 with no year recorded