79-10-04 CANADAIR: Amendment 39-3459. Applies to Models CL-44D4, and CL-44J aircraft.
Compliance required within the next 1700 hours in service and, if applicable, upon application for U.S. registration and airworthiness certification, after the effective date of this AD unless already accomplished.
1) (Docket No. 78-EA-82)
In order to fireproof the engine fire extinguishing system fittings in inboard and outboard nacelles, accomplish the following:
a. Wrap the fittings with asbestos tape and then coat them with a suitable end dip as described in Paragraphs "2" and "3" of Canadair Service Bulletin No. CL-44D4-480, dated December 11, 1972, or an equivalent alteration.
2) (Docket No. 78-EA-85)
To minimize the chance of over-pressurizing the outer auxiliary fuel tanks during pressure refueling, and to eliminate wear caused by possible interference between float arm and valve casing, accomplish the following:
a. Alter the modulator and shut-off pilot valves by riveting a fabricated angle to the float, re-identify them; re-identify the fuel level control valve assembly; and functionally check the altered valves all in accordance with the "Modification Procedure" of Canadair Service Bulletin No. CL-44-485, dated April 5, 1978.
3) (Docket No. 78-EA-86)
In order to reduce the probability of flammmable fluid fires within the engine cowling areas and reduce the risk of damaging engine oil and fuel drain lines located on the engine bottom cowls, accomplish the following:
a. Alter the engine cowling and drain lines in accordance with the "Modification" paragraph of Canadair Service Bulletin No. CL-33D4-486 dated May 12, 1978, or an equivalent alteration.
Any equivalent method of compliance must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. Upon request with substantiating data submitted through an FAA Maintenance Inspector, the compliance time may be changed by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.
The aircraft may be flown in accordance with FAR 21.197 to a location where the AD can be accomplished.
Compliance with this AD must be noted in the logbook of the aircraft by referencing the AD number and the specific item complied with: ex. AD 79-10-04 (2) if item (2) is being accomplished.
This amendment becomes effective May 9, 1979.