83-10-02 BRITISH AEROSPACE: Amendment 39-4651. Applies to BAC 1-11 200 and 400 series airplanes, certificated in all categories. Compliance is required as indicated.
For airplanes fitted with pilots windshield No. 1, left and right-hand part numbers AB31A705 and AB31A706 respectively, produced in 1979 and 1980 with serial numbers beginning with 9-H and 0-H, manufactured by P.P.G. Industries, Inc., accomplish the following, unless already accomplished:
A. Check the bus-to-bus electrical resistance of the windshield NESA coat within the next 200 hours time in service or 28 days, whichever occurs first, after the effective date of this AD in accordance with paragraph 2.1 of the Accomplishment Instructions of British Aerospace Alert Service Bulletin 56-A-PM5836, dated March 19, 1982.
NOTE: If windshield is replaced with another windshield produced in 1979 or 1980, repeat paragraph A after 200 hours time in service but not later than 300 hours time in service on the replacement windshield.
B. Accomplish the actions of paragraph 2.2, 203, or 2.4 of the service bulletin based upon the resistance values obtained in the check done in paragraph A.
C. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, 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 May 31, 1983.