# AD 89-24-07: Anti-Icing Advisory System - Type: Airworthiness directive - Status: Current - Products: ATR - GIE Avions de Transport R gional ATR42-200, ATR42-300, ATR42-320 and ATR42-500 - Effective: December 15, 1989 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-6394 - Docket: 89-NM-126-AD - Registered aircraft: 28 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FE834C9FE8B722FC862569830045228F.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/89-24-07 ## The airworthiness directive 89-24-07 AEROSPATIALE: Amendment 39-6394. Docket No. 89-NM-126-AD. Applicability: All Model ATR42 series airplanes, certificated in any category. Compliance: Required within 60 days after the effective date of this AD, unless previously accomplished. To improve protection against loss of control when operating in icing conditions, including freezing rain, accomplish the following: A. Install an anti-icing advisory system in accordance with Aerospatiale Service Bulletins ATR42-27-0021, Revision 8, dated May 2, 1989; ATR42-30-0017, Revision 3, dated January 20, 1989; ATR42-30-0018, Revision 4, dated June 14, 1989; ATR 42-30-0021, Revision 3, dated July 20, 1989; ATR42-30-0024, Revision 1, dated February 13, 1989; and ATR42-30- 0027, Revision 1, dated February 21, 1989. B. Incorporate Revision 6 of the Airplane Flight Manual (AFM), dated August 1988, into the FAA-approved AFM. C. 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, Standardization Branch, ANM-113, FAA, Northwest Mountain Region. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment and then send it to the Manager, Standardization Branch, ANM-113. D. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Aerospatiale, 316 Route de Bayonne, 31060 Toulouse, Cedex 03, France. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or the Standardization Branch, 9010 East Marginal Way South, Seattle, Washington. This amendment (39-6394, AD 89-24-07) becomes effective on December 15, 1989. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A53EU](https://openairdocs.org/tcds/A53EU): ATR – GIE Avions de Transport Régional; names 4 of 11 models: ATR42-300, ATR42-320, ATR42-200, ATR42-500 ## 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: 28 (28 by airframe model, 0 by engine model) - Makers: Aerospatiale/Aeritalia 16, Atr-Gie Avions De Trnsp Region 6, Aerospatiale/Alenia 3, Atr-Gie Avions De Transport 1, Atr-Gie Avions De Trnsp Rgnl 1, Eads/Alenia ATR 1 Models with the most aircraft: - [Aerospatiale/Aeritalia ATR 42-300](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-300): 12 aircraft (airframe model) - [Atr-Gie Avions De Trnsp Region ATR42-500](https://openairdocs.org/model/atr-gie-avions-de-trnsp-region-atr42-500): 6 aircraft (airframe model) - [Aerospatiale/Aeritalia ATR 42-320](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-320): 4 aircraft (airframe model) - [Aerospatiale/Alenia ATR 42-320](https://openairdocs.org/model/aerospatiale-alenia-atr-42-320): 2 aircraft (airframe model) - [Atr-Gie Avions De Transport ATR-42-320](https://openairdocs.org/model/atr-gie-avions-de-transport-atr-42-320): 1 aircraft (airframe model) - [Atr-Gie Avions De Trnsp Rgnl ATR 42-300](https://openairdocs.org/model/atr-gie-avions-de-trnsp-rgnl-atr-42-300): 1 aircraft (airframe model) - [Eads/Alenia ATR ATR 42-500](https://openairdocs.org/model/eads-alenia-atr-atr-42-500): 1 aircraft (airframe model) - [Aerospatiale/Alenia ATR42-500](https://openairdocs.org/model/aerospatiale-alenia-atr42-500): 1 aircraft (airframe model) All 8 models: https://openairdocs.org/ad/89-24-07/models.md Every aircraft: https://openairdocs.org/ad/89-24-07/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.