# AD 89-23-10: Engine Ice Ingestion

- Type: Airworthiness directive
- Status: Current
- Products: Boeing 737-300 Series and 737-400 Series
- Effective: December 4, 1989
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-6375
- Docket: 88-NM-212-AD
- Registered aircraft: 30 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4C7285F30F57AD198625695E00603E53.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/89-23-10

## The airworthiness directive

89-23-10 BOEING: Amendment 39-6375. Docket No. 88-NM-212-AD.

Applicability: Model 737-300 and -400 series airplanes, certificated in any category.

Compliance: Required within 10 days after the effective date of this AD, unless previously accomplished.

To reduce the risk of jeopardizing continued safe flight and landing due to engine ice ingestion, accomplish the following:

A. Incorporate Boeing Operations Manual Bulletin 737-300-89-1 or 737-400-89-1, both dated February 14, 1989, as appropriate, into the Airplane Operations Manual.

B. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

NOTE: The request should be forwarded through an FAA Principal Operations Inspector (POI), who will either concur or comment and then send it to the Manager, Seattle Aircraft Certification Office.

All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington.

This amendment (39-6375, AD 89-23-10) becomes effective on December 4, 1989.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A16WE](https://openairdocs.org/tcds/A16WE): The Boeing Company; names 2 of 17 models: 737-300 Series, 737-400 Series

## 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: 30 (30 by airframe model, 0 by engine model)
- Makers: Boeing 30

Models with the most aircraft:

- [Boeing 737-400](https://openairdocs.org/model/boeing-737-400): 8 aircraft (airframe model)
- [Boeing 737-436](https://openairdocs.org/model/boeing-737-436): 6 aircraft (airframe model)
- [Boeing 737-300](https://openairdocs.org/model/boeing-737-300): 4 aircraft (airframe model)
- [Boeing 737-490](https://openairdocs.org/model/boeing-737-490): 3 aircraft (airframe model)
- [Boeing 737-484](https://openairdocs.org/model/boeing-737-484): 3 aircraft (airframe model)
- [Boeing 737-301](https://openairdocs.org/model/boeing-737-301): 1 aircraft (airframe model)
- [Boeing 737-401](https://openairdocs.org/model/boeing-737-401): 1 aircraft (airframe model)
- [Boeing 737-306](https://openairdocs.org/model/boeing-737-306): 1 aircraft (airframe model)
- [Boeing 737-319](https://openairdocs.org/model/boeing-737-319): 1 aircraft (airframe model)
- [Boeing 737-330](https://openairdocs.org/model/boeing-737-330): 1 aircraft (airframe model)
- [Boeing 737-405](https://openairdocs.org/model/boeing-737-405): 1 aircraft (airframe model)

All 11 models: https://openairdocs.org/ad/89-23-10/models.md
Every aircraft: https://openairdocs.org/ad/89-23-10/aircraft.md

Its text cites no advisory circulars or STCs.

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