# AD 89-12-03: Airflow Sensor Vanes - Type: Airworthiness directive - Status: Current - Products: Textron BAe.125 Series 800A, BAe.125 Series 800A (C-29A) and BAe.125 Series 800A (U-125) - Effective: June 12, 1989 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-6228 - Registered aircraft: 84 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/355FA3AB05A03514862569F30051B640.0001 - DRS record last changed: January 21, 2026 - Page: https://openairdocs.org/ad/89-12-03 ## The airworthiness directive 89-12-03 BRITISH AEROSPACE: Amendment 39-6228. Applicability: Model BAe 125-800A series airplanes, up to and including serial number 258147, certificated in any category. Compliance: Required as indicated, unless previously accomplished. To prevent damage to the engine fan blades, accomplish the following: A. Within 14 days after the effective date of this AD, inspect the left and right airflow angle sensor vanes for the trailing edge balance weight installation feature, in accordance with British Aerospace Service Bulletin 27-149, dated March 17, 1989. 1. If the inspection reveals an airflow angle sensor vane that does not have the balance weight feature installed, no further action is required. 2. If the inspection reveals an airflow angle sensor vane that has the balance weight feature installed, visually inspect the balance weight for security of its attachment in the trailing edge of the airflow angle sensor vane, in accordance with the service bulletin. a. If the balance weight is loose, damaged, or missing, replace it with a new airflow angle sensor vane prior to further flight, in accordance with the service bulletin. b. If the balance weight is secure and is not damaged, reinspect the balance weight for security, prior to each flight, until it is replaced with a new airflow angle sensor vane that does not have the trailing edge balance weight installation feature. 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 for the accomplishment of the requirements of this AD. All persons affected by this directive who have not already received the appropriate service information from the manufacturer may obtain copies upon request to British Aerospace, PLC, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, D.C. 20041. This information may be examined at the FAA, Transport Airplane Directorate, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington. This amendment (39-6228, AD 89-12-03) becomes effective on June 12, 1989. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A3EU](https://openairdocs.org/tcds/A3EU): Textron Aviation Inc.; names 1 of 50 models: BAe.125 Series 800A (U-125) ## 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: 84 (84 by airframe model, 0 by engine model) - Makers: British Aerospace 66, Corporate Jets 8, Raytheon Corporate Jets 8, Raytheon 2 Models with the most aircraft: - [British Aerospace BAE 125 SERIES 800A](https://openairdocs.org/model/british-aerospace-bae-125-series-800a): 61 aircraft (airframe model) - [Corporate Jets BAE 125-800A](https://openairdocs.org/model/corporate-jets-bae-125-800a): 8 aircraft (airframe model) - [Raytheon Corporate Jets BAE 125-800A](https://openairdocs.org/model/raytheon-corporate-jets-bae-125-800a): 8 aircraft (airframe model) - [British Aerospace BAE 125-800A](https://openairdocs.org/model/british-aerospace-bae-125-800a): 5 aircraft (airframe model) - [Raytheon BAE 125-800A](https://openairdocs.org/model/raytheon-bae-125-800a): 2 aircraft (airframe model) All 6 models: https://openairdocs.org/ad/89-12-03/models.md Every aircraft: https://openairdocs.org/ad/89-12-03/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.