# AD 78-25-09: Seats

- Type: Airworthiness directive
- Status: Current
- Products: Boeing DC-10-10, DC-10-10F, DC-10-30, DC-10-30F (KC-10A, KDC-10) and DC-10-40
- Effective: December 22, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-3372
- Registered aircraft: 25 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C04DA106AB9C037B862569CA00511188.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/78-25-09

## 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 data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A22WE](https://openairdocs.org/tcds/A22WE): The Boeing Company; names 5 of 11 models: DC-10-40, DC-10-10F, DC-10-30, DC-10-30F (KC-10A KDC-10), DC-10-10

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 25 (25 by airframe model, 0 by engine model)
- Makers: Mcdonnell Douglas 13, Douglas 7, Mcdonnell-Douglas 5

Models with the most aircraft:

- [Mcdonnell Douglas DC-10-30F](https://openairdocs.org/model/mcdonnell-douglas-dc-10-30f): 12 aircraft (airframe model)
- [Douglas DC-10-40](https://openairdocs.org/model/douglas-dc-10-40): 6 aircraft (airframe model)
- [Mcdonnell-Douglas DC-10-30](https://openairdocs.org/model/mcdonnell-douglas-dc-10-30): 5 aircraft (airframe model)
- [Douglas DC-10-30F](https://openairdocs.org/model/douglas-dc-10-30f): 1 aircraft (airframe model)
- [Mcdonnell Douglas DC-10-30F (KDC-10)](https://openairdocs.org/model/mcdonnell-douglas-dc-10-30f-kdc-10): 1 aircraft (airframe model)

All 5 models: https://openairdocs.org/ad/78-25-09/models.md
Every aircraft: https://openairdocs.org/ad/78-25-09/aircraft.md

Its text cites no advisory circulars or STCs.

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