- Effective
- August 15, 1974
- Models
- DC-10-10, DC-10-10F, DC-10-15, DC-10-30, DC-10-30F (KC-10A, KDC-10), DC-10-40 and 55 more
- Registered aircraft
- 137 matched by model
- Product
- Appliance
- Amendment
- 39-1895
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.
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On this page
The airworthiness directive
74-14-07 SIERRA ENGINEERING CO: Amendment 39-1895. Applies to Sierra Engineering Company Model 289-601 series passenger oxygen masks installed in aircraft certificated in all categories, including, but not limited to DC-8, DC-9, DC-10 and L-1011 aircraft.
Compliance required within one year after the effective date of this AD, unless already accomplished.
To prevent separation of the reservoir from the mask facepiece, accomplish the following:
(a) Install a retaining disk to secure the reservoir to the facepiece on Sierra Model 289-601 series passenger oxygen masks in accordance with Sierra Engineering Company Service Bulletins No. 289-601-35-1, dated February 11, 1974, and No. 289-601-35-2 dated March 1, 1974, or later FAA-approved revisions.
(b) Equivalent installations may be approved by the Chief, Aircraft Engineering Division, FAA Western Region.
(c) Aircraft may be flown to a base for the performance of that maintenance required by this AD per FAR's21.197 and 21.199.
This amendment becomes effective August 15, 1974.
Affected TCDS · 4
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 137
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1966 | 1 |
|---|---|
| 1967 | 4 |
| 1968 | 1 |
| 1969 | 3 |
| 1970 | 1 |
| 1972 | 1 |
| 1974 | 2 |
| 1975 | 1 |
| 1976 | 1 |
| 1978 | 1 |
| 1979 | 1 |
| 1980 | 1 |
| 1982 | 1 |
| 1986 | 1 |
| 1987 | 5 |
| 1988 | 5 |
| 1989 | 3 |
| 1990 | 3 |
| 1991 | 23 |
| 1992 | 5 |
| 1993 | 1 |
| 1994 | 1 |
| 1996 | 1 |
| 1997 | 6 |
| 1998 | 6 |
| 1999 | 16 |
42 with no year recorded