82-06-06 CANADAIR: Amendment 39-4346. Applies to Model CL-600 airplanes serial numbers 1012 thru 1024 certificated in all categories. To prevent damage to the flap drive shafts, accomplish the following:
1. Within the next 50 hours time in service after the effective date of this AD, unless already accomplished within the last 100 hours time in service, and thereafter at intervals not to exceed 150 hours time in service, inspect the left and right flap drive shafts for damage between WS220 and WS264, in accordance with paragraphs 2.A and 2.B of Canadair Alert Service Bulletin No. A600-0037, Revision 1, dated October 28, 1981. If either drive shaft is damaged beyond the service bulletin limits, replace the shaft prior to further flight.
2. Before the accumulation of 550 hours time in service or within the next 50 hours time in service, whichever occurs later, unless already accomplished, install clamp supports for the left and right flap drive shafts at WS237.10, in accordance with paragraph 2.D of the Canadair Alert Service Bulletin.
3. The inspections required by paragraph (1) are terminated by incorporation of the clamp support in accordance with paragraph (2) of this AD.
4. Airplanes may be flown in accordance with FAR 21.197 to a maintenance base for accomplishment of the inspection required by this AD.
5. Alternate methods of compliance with this AD may be used when they provide an equivalent level of safety and are 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).
This amendment becomes effective March 22, 1982.