# AD 81-13-51: Wheel Brake Assembly - Type: Airworthiness directive - Status: Current - Products: Bombardier CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), CL-600-2B16 (CL-601-3A), CL-600-2B16 (CL-601-3R), CL-600-2B16 (CL-604) and CL-600-2B19 (Regional Jet Series 100) - Effective: December 7, 1981 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-4268 - Registered aircraft: 1,015 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CC70317E41F13559862569EA0069AC3C.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/81-13-51 ## The airworthiness directive 81-13-51 CANADAIR: Amendment 39-4268. Applies to all Canadair CL-600 series airplanes certified in all categories. To detect dragging wheel brakes, unless already accomplished, accomplish the following prior to further flight. A. Inspect and replace, if necessary, wheel brake assembly P/N 600-85083-55 with wheel brake assembly P/N 600-85083-57 in accordance with Canadair Alert Service Bulletin A600-0045, Revision 1, dated June 15, 1981. B. Airplanes may be flown to a maintenance base for repairs or replacement in accordance with FAR 21.197. C. Alternate means of compliance or other actions which provide an equivalent level of safety may be used when approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Mountain Region. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to the addresses listed above. These documents may also be examined at FAA Northwest Mountain Region, 9010 East Marginal Way South, Seattle, Washington 98108. This amendment becomes effective December 7, 1981 and was effective earlier to those recipients of Telegraphic AD T81-13-51 dated June 19, 1981. ## Affected data sheets (2) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A21EA](https://openairdocs.org/tcds/A21EA): Bombardier Inc.; names 3 of 5 models: CL-600-1A11 (600), CL-600-2A12 (601), CL-600-2B16 (604 Variant) - [TCDS A21EA-1](https://openairdocs.org/tcds/A21EA-1): MHI RJ Aviation ULC; names 1 of 9 models: CL-600-2B19 (Regional Jet Series 100) ## 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: 1,015 (1,015 by airframe model, 0 by engine model) - Makers: Bombardier 827, Canadair 183, Bombardier Inc Canadair 2, Bombardier Aerospace 1, Canadair Bombardier 1, Mhi RJ Aviation ULC 1 Models with the most aircraft: - [Bombardier CL-600-2B19](https://openairdocs.org/model/bombardier-cl-600-2b19): 395 aircraft (airframe model) - [Bombardier CL-600-2B16](https://openairdocs.org/model/bombardier-cl-600-2b16): 388 aircraft (airframe model) - [Canadair CL-600-2B16](https://openairdocs.org/model/canadair-cl-600-2b16): 134 aircraft (airframe model) - [Bombardier CL-600-2B16(CL-604)](https://openairdocs.org/model/bombardier-cl-600-2b16-cl-604): 42 aircraft (airframe model) - [Canadair CL-600-2A12](https://openairdocs.org/model/canadair-cl-600-2a12): 19 aircraft (airframe model) - [Canadair CL-600-2B19](https://openairdocs.org/model/canadair-cl-600-2b19): 19 aircraft (airframe model) - [Canadair CL-600-1A11](https://openairdocs.org/model/canadair-cl-600-1a11): 5 aircraft (airframe model) - [Canadair CL600-2B16(CL601-3A)](https://openairdocs.org/model/canadair-cl600-2b16-cl601-3a): 3 aircraft (airframe model) - [Bombardier Inc Canadair CL-600-2B19](https://openairdocs.org/model/bombardier-inc-canadair-cl-600-2b19): 2 aircraft (airframe model) - [Canadair CL600-1A11](https://openairdocs.org/model/canadair-cl600-1a11): 2 aircraft (airframe model) - [Bombardier CL-600-2A12](https://openairdocs.org/model/bombardier-cl-600-2a12): 1 aircraft (airframe model) - [Bombardier CL600-2B16 (CL601-3A](https://openairdocs.org/model/bombardier-cl600-2b16-cl601-3a): 1 aircraft (airframe model) - [Bombardier Aerospace CL-600-2B16 (CL-604)](https://openairdocs.org/model/bombardier-aerospace-cl-600-2b16-cl-604): 1 aircraft (airframe model) - [Mhi RJ Aviation ULC CL-600-2B19](https://openairdocs.org/model/mhi-rj-aviation-ulc-cl-600-2b19): 1 aircraft (airframe model) - [Canadair Bombardier CL-600-2B16](https://openairdocs.org/model/canadair-bombardier-cl-600-2b16): 1 aircraft (airframe model) - [Canadair CL-600-2A12(CL-601)](https://openairdocs.org/model/canadair-cl-600-2a12-cl-601): 1 aircraft (airframe model) All 16 models: https://openairdocs.org/ad/81-13-51/models.md Every aircraft: https://openairdocs.org/ad/81-13-51/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.