- Effective
- December 22, 1978
- Models
- DC-10-10, DC-10-10F, DC-10-30, DC-10-30F (KC-10A, KDC-10), DC-10-40
- Data sheet
- TCDSA22WE
- Registered aircraft
- 25 matched by model
- Product
- Aircraft · Large airplane
- Amendment
- 39-3372
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
78-25-09 MCDONNELL DOUGLAS: Amendment 39-3372. Applies to DC-10-10, -10F, -30, -30F, and -40 airplanes certificated in all categories which have Universal Oil Products Company Model 900-400-C3C seats through Serial No. 3860, installed.
Compliance required within the next 30 days after the effective date of this AD, unless already accomplished.
To assure that the seatback tray table retention clip cannot be rotated to a position in which it prevents automatic deployment of oxygen masks during depressurization, accomplish the following:
(a) Modify the Universal Oil Products Company Model 900-400-C3C seat through Serial No. 3860, in accordance with Universal Oil Products Service Bulletin No. 25-494, original issue dated September 18, 1978.
(b) Equivalent modification may be used when approved by the Chief, Aircraft Engineering Division, FAA, Western Region.
(c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanesto a base for the accomplishment of the modifications required by this AD.
This amendment becomes effective December 22, 1978.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 25
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1975 | 1 |
|---|---|
| 1976 | 1 |
| 1978 | 1 |
| 1979 | 1 |
| 1980 | 1 |
| 1988 | 1 |
19 with no year recorded