# AD 75-04-11: Ingestion of Ice and Snow

- Type: Airworthiness directive
- Status: Historical
- Products: McDonnell Douglas DC-10-10, DC-10-10F, DC-10-30 and DC-10-30F (KC-10A)
- Effective: February 21, 1975
- Superseded by: [AD 94-22-01](https://openairdocs.org/ad/94-22-01)
- Product type: Aircraft, Large airplane
- Amendment: 39-2094
- Registered aircraft: 19 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FD5E89D973E8D3FA86256A1E004BF6CD.0001
- DRS record last changed: August 7, 2025
- Page: https://openairdocs.org/ad/75-04-11

## The airworthiness directive

75-04-11 MCDONNELL DOUGLAS: Amendment 39-2094. Applies to Douglas DC-10 Series -10, -10F, -30, and -30F airplanes, certificated in all categories.

To prevent possible damage to the No. 2 engine due to ingestion of ice and snow, accomplish the following.

  (a) After the effective date of this airworthiness directive, when airplanes have been parked during icing conditions (freezing rain, snow, sleet) for any period of time which will enable ice or snow to accumulate on the airplane in the area of the No. 2 engine, inspect the top of the fuselage and the No. 2 engine inlet for the presence of ice and snow accumulation prior to starting engines. If found to exist, remove accumulated ice and snow prior to further flight.

NOTE: Guidelines for inspection and safeguarding the aircraft are contained in these documents:

Douglas AOL 10-546, dated January 11, 1974

Douglas AOL 10-673, dated August 7, 1974

DC-10 Maintenance Manual, Chapter 12-31-01 (b) Make appropriatemaintenance record entries to show compliance with this AD.

This amendment becomes effective February 21, 1975.

## 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 4 of 11 models: 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: 19 (19 by airframe model, 0 by engine model)
- Makers: Mcdonnell Douglas 13, Mcdonnell-Douglas 5, Douglas 1

Models with the most aircraft:

- [Mcdonnell Douglas DC-10-30F](https://openairdocs.org/model/mcdonnell-douglas-dc-10-30f): 12 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 4 models: https://openairdocs.org/ad/75-04-11/models.md
Every aircraft: https://openairdocs.org/ad/75-04-11/aircraft.md

## Related documents

- [AD 94-22-01](https://openairdocs.org/ad/94-22-01): Ingestion Of Ice Or Snow · Boeing DC-10-10, DC-10-10F, DC-10-15 and 2 more. Effective Nov 28, 1994. Supersedes this AD

Its text cites no advisory circulars or STCs.

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