Back to AD

AD 85-07-08 ACTIVE

Audio Communication System
Key Information
AD Number 85-07-08 Status Active
Effective Date May 13, 1985 Issue Date Not specified
Docket Number Unknown Amendment 39-5032
Product Type ["Aircraft"] Product Subtype ["Large Airplane"]
CFR Part --- - Part 39 CFR Section N/A
Citation This information is not available.
Applicability
Manufacturer(s) Not specified
Model(s) BH.125 Series 400A BH.125 Series 600A DH.125 Series 1A DH.125 Series 1A/R-522 DH.125 Series 1A/S-522 DH.125 Series 1A-522 DH.125 Series 3A DH.125 Series 3A/R DH.125 Series 3A/RA DH.125 Series 400A HS.125 Series 600A HS.125 Series 700A
Regulatory Text

85-07-08 BRITISH AEROSPACE: Amendment 39-5032. Applies to Model HS/BH/DH 125 series airplanes with the serial numbers listed in the applicability statement of British Aerospace HS 125 Service Bulletin 23-21-(8765), dated March 22, 1983. Compliance is required within 180 days after the effective date of this AD, unless previously accomplished. To prevent failure of the audio communication system, accomplish the following:

A. Modify the power supply system in accordance with the accomplishment instructions of British Aerospace HS 125 Service Bulletin 23-21-8765, dated March 22, 1983.

B. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

C. 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.

Thisamendment becomes effective May 13, 1985.