# AD 89-23-04: Trim Switch - Type: Airworthiness directive - Status: Current - Products: Airbus A300 B2-1A, A300 B2-1C, A300 B2-203, A300 B2K-3C, A300 B4-103, A300 B4-203, A300 B4-2C, A300 B4-601, A300 B4-603, A300 B4-605R, A300 B4-620, A300 B4-622 and 12 more - Effective: December 1, 1989 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-6371 - Docket: 89-NM-92-AD - Registered aircraft: 124 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/17B3D599F9A8BC118625695B0066DAD8.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/89-23-04 ## The airworthiness directive 89-23-04 AIRBUS INDUSTRIE: Amendment 39-6371. Docket No. 89-NM-92-AD. Applicability: Models A300, A310, and A300-600 series airplanes, certificated in any category. Compliance: Required within 30 days after the effective date of this AD, unless previously accomplished. To prevent pitch trim runaway, accomplish the following: A. Perform an inspection to determine if SAMM trim switches, Part Number BP 20- 455, Serial Numbers 110 to 923, inclusive, are fitted on the normal pitch trim electrical circuit, in accordance with All Operators Telex (AOT) 22/88/01, dated November 23, 1988. If any trim switch is determined to have any of these serial numbers, prior to further flight, replace the switch with a serviceable trim switch having a serial number 924 or higher, in accordance with Airplane Maintenance Manual (AMM) 22-27-12 (for Model A310 and A300-600 series airplanes) or AMM 27-11-11 (for Model A300 series airplanes), as appropriate. 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, 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. C. 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 Airbus Industrie, Airbus Support Division, Avenue Didier Daurat, 31700 Blagnac, 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 (39-6371, AD 89-23-04) becomes effective on December 1, 1989. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A35EU](https://openairdocs.org/tcds/A35EU): Airbus SAS; names 17 of 17 models: A310-203, A300 B4-622R, A300 F4-605R, A300 B4-601, A310-204, A310-221, A300 B4-603, A300 B4-622… ## 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: 124 (124 by airframe model, 0 by engine model) - Makers: Airbus Industrie 76, Airbus 48 Models with the most aircraft: - [Airbus Industrie A300 F4-605R](https://openairdocs.org/model/airbus-industrie-a300-f4-605r): 36 aircraft (airframe model) - [Airbus A300 F4-622R](https://openairdocs.org/model/airbus-a300-f4-622r): 31 aircraft (airframe model) - [Airbus Industrie A300 F4-622R](https://openairdocs.org/model/airbus-industrie-a300-f4-622r): 21 aircraft (airframe model) - [Airbus A300 B4-622R](https://openairdocs.org/model/airbus-a300-b4-622r): 11 aircraft (airframe model) - [Airbus Industrie A300 B4-622R](https://openairdocs.org/model/airbus-industrie-a300-b4-622r): 10 aircraft (airframe model) - [Airbus A300 F4-605R](https://openairdocs.org/model/airbus-a300-f4-605r): 6 aircraft (airframe model) - [Airbus Industrie A300 B4-605R](https://openairdocs.org/model/airbus-industrie-a300-b4-605r): 3 aircraft (airframe model) - [Airbus Industrie A310-203](https://openairdocs.org/model/airbus-industrie-a310-203): 2 aircraft (airframe model) - [Airbus Industrie A310-222](https://openairdocs.org/model/airbus-industrie-a310-222): 2 aircraft (airframe model) - [Airbus Industrie A300 B4-622](https://openairdocs.org/model/airbus-industrie-a300-b4-622): 2 aircraft (airframe model) All 10 models: https://openairdocs.org/ad/89-23-04/models.md Every aircraft: https://openairdocs.org/ad/89-23-04/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.