AD 71-08-04

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AD Number:
71-08-04
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Models 744, 745D, and 810 Series Airplanes
Subject:
Undervoltage Sensing Unit
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
05/08/1971
Make:
Vickers-Armstrongs (Aircraft Limited)
Model:
Viscount 744 | Viscount 745D | Viscount 810
Product Type:
Aircraft
Product Subtype:
Large Airplane
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 71-08-04
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-1191

AD NUMBER:   71-08-04

SUBJECT HEADING:   Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Models 744, 745D, and 810 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective May 8, 1971.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
71-08-04 BRITISH AIRCRAFT CORPORATION: Amdt. 39-1191. Applies to Vickers Viscount Models 744, 745D, and 810 series airplanes.

Compliance is required as indicated.

To prevent a hazardous drift in the bus-bar undervoltage sensing unit setting, within the next 1000 hours' time in service after the effective date of this AD or upon installation of the bus- bar undervoltage warning light in accordance with AD 70-02-04, whichever occurs later, incorporate Rotax Modification SP7174 by replacing the transistor T.1 in the Rotax Voltage Sensing Unit Type U.3619 with a new transistor in accordance with Rotax Service Bulletin No. 24- 368 dated 4 May 1970, or later ARB-approved issue or an FAA approved equivalent.

(British Aircraft Corporation Bulletin for Modification No. D3246, 3rd Issue, dated 12 May 1970, and Bulletin for Modification FG.2123, 3rd Issue, dated 12 May 1970 refer to this subject).

This amendment becomes effective May 8, 1971.

FOOTER: