AD 85-15-03

85-15-03 AEROSPATIALE (SUD NORD): Amendment 39-5099. Applies to the Nord Model 262A series airplanes which have not incorporated STC SA2369SW, certificated in any category. Compliance required within 90 days after the effective date of this airworthiness directive (AD), unless already accomplished.

To prevent undetected system failures or malfunctions in the windshield and turbine engine anti-icing systems, accomplish the following:

A. Install additional fuses in the windshield anti-icing control circuitry for all windshield panels in accordance with Nord Service Bulletin No. 30-14, dated September 29, 1971 (which constitutes Nord modification No. 733), on Nord Model 262A series airplanes having serial numbers 8 through 20, 22 through 27, 29 through 35, 37 through 42, 47 through 50, 54, 56, 69, 74, and 84.

B. Accomplish modifications to the turbine engine anti-icing control circuitry described in the planning section, paragraph I.C. of Nord Service Bulletin No. 30-15, dated October 29, 1971, as revised August 27, 1974 (which constitutes Nord modification No. 669). Accomplish the modifications in accordance with the Section II, Accomplishment Instructions, of the service bulletin on Nord Model 262A series airplanes having serial numbers 4 through 27, 29 through 35, 37 through 42, 47 through 50, 54, 56, 57, 69, and 84.

C. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, Standardization Branch, Aircraft Certification Division, FAA, Northwest Mountain Region.

D. 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 inspections and/or modifications required by this AD.

This amendment becomes effective August 22, 1985.