# AD 75-18-08: Airplane Misalignment

- 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: November 10, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-2411
- Registered aircraft: 25 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CB1E9A0448E2B2C286256E0C00720096.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/75-18-08

## The airworthiness directive

75-18-08 MCDONNELL DOUGLAS: Amendment 39-2351 as amended by Amendment 39-2411. Applies to DC-10-10, -10F, -30, -30F and -40 series airplanes, certificated in all categories.

To prevent possible airplane misalignment during ILS approaches without readily available failure indication, accomplish the following:

      (A) Unless already accomplished or unless one of the relieving provisions, specified below, has been accomplished, within four calendar days after receipt of this telegram the airplane is limited to Category I minima and the following placard or its equivalent must be placed in plain view of the pilots: AIRCRAFT LIMITED TO CATEGORY I APPROACH MINIMA.

      (B) Operators shall, by the most immediate and practicable means, notify flight crews of the foregoing.

      (C) The Category I limitation does not apply to an airplane after accomplishing one of the following:

  (1) Accomplish modification defined in McDonnell Douglas Service Bulletin 34-66, dated July 23, 1975, or later FAA-approved revisions; or

  (2) Accomplish a modification approved by the Chief, Aircraft Engineering Division, FAA Western Region.

      (D) Prior to August 6, 1976, accomplish McDonnell Douglas Service Bulletin 34-66, dated July 23, 1975, or later FAA-approved revisions, or an equivalent modification approved by the Chief, Aircraft Engineering Division, FAA Western Region.

Amendment 39-2351 was effective September 2, 1975, for all persons except those to whom it was made effective immediately by telegrams dated August 6, 1975.

This amendment 39-2411 is effective November 10, 1975 for all persons except those to whom it was made effective by telegrams, dated October 10, 1975, which contained this amendment.

## 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/75-18-08/models.md
Every aircraft: https://openairdocs.org/ad/75-18-08/aircraft.md

Its text cites no advisory circulars or STCs.

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