AD 58-07-06

AD Final Rules - DRS_58-07-06.html
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AD Number:
58-07-06
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; VICKERS Model 700 Series Aircraft
Subject:
Wing Root Terminal Connections
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
Make:
Vickers-Armstrongs (Aircraft Limited)
Model:
Viscount 744 | Viscount 745D
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Superseded AD: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Superseded By: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: 58-07-06
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:  

AD NUMBER:   58-07-06

SUBJECT HEADING:   Airworthiness Directives; VICKERS Model 700 Series Aircraft

ACTION:  

SUMMARY:  

DATES:  

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
58-07-06 VICKERS: Applies to All Viscount 700 Series Aircraft Fitted With Heavy- Duty
Wing Root Terminals and Aluminum Cables, Incorporating Modification D.1255.

Compliance required as indicated.

Cases have occurred of heavy-duty wing root terminals with their associated aluminum cables overheating as a result of poor electrical contact between the aluminum cable lug and the wing root terminal assembly. The poor electrical contact is attributed to the relaxation of the connection and the spreading and indentation of the aluminum cable lug by repetitive torque loading.

To prevent the possibility of damage to the cable lug, a special washer, 80236 Part 3043, has been introduced by Mod. D.2628 to replace the existing washer 72436 Part 2069. The new washer is of increased thickness with an electro-tinned finish and has an outside diameter equal to the width of the cable lug.

Vickers-Armstrong has issued the following corrective measures which the British Air registration Board considers mandatory. The FAA concurs and considers compliance therewith mandatory.

Inspect all wing root connections for signs of looseness and overheated condition within the next 135 flying hours and take the following action:

1. Where signs of overheat are apparent the wing root terminal and cable lug assembly should be dismantled, and the overheated cable and components renewed.

2. Where loose connections are found these should be retightened after first inspecting the cable lug to ensure that the faces of the lug are clean, flat and free from signs of burning.

3. If signs of burning or damage are found on either face of the lug when complying with the recommendations in paragraphs 1 and 2, the lug and its associated cable should be replaced.

4. Where no signs of overheated or loose connections are found, existing terminal connections may be considered serviceable. All wing root connections should, however, be further inspected within every subsequent 135 flying hours until the new washer 80236 Part 3043 is fitted in place of washer 72436 Part 2069.

5. All wing root connections must have washer 80236 Part 3043 installed within 800 flying hours.

(Vickers-Armstrong PTL No. 186, Issue 1, dated February 11, 1958, and Modification Bulletin No. D.2628 covers the same subject.)

FOOTER: