AD 83-02-04 R1

83-02-04 R1 BRITISH AEROSPACE AIRCRAFT GROUP: Amendment 39-4558 as amended by Amendment 39-4663. Applies to Model HS 125 series airplanes, serial numbers NA0201 to NA0299 and serial numbers 257001 to 257139, plus all airplanes retrofitted with Garrett TFE 731 engines, certificated in all categories. Compliance required as indicated, unless already accomplished. To prevent possible failure of windshield heat from external high voltage static charge conditions and to prevent potential generator tripping from electrical interference effects, accomplish the following:

1. Within the next 200 hours time in service or two months, whichever occurs first, after the effective date of this AD, perform the modifications specified in Part 2, Accomplishment Instructions, of British Aerospace Aircraft Group, Hatfield-Chester Division, 125 Service Bulletin 24-230-(2790), Revision 3, dated June 11, 1982.

2. Alternate means of compliance which provide an equivalent level of safety may beused when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

3. 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.

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).

Amendment 39-4558 became effective February 10, 1983.

This Amendment 39-4663 becomes effective June 22, 1983.