AD 64-06-07

AD Final Rules - DRS_64-06-07.html
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AD Number:
64-06-07
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; VERTOL All Model 107-II Helicopters
Subject:
Stability Augmentation Systems
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
03/07/1964
Make:
Columbia Helicopters, Inc.
Model:
107-II
Product Type:
Aircraft
Product Subtype:
Rotorcraft
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 64-06-07
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:  

AD NUMBER:   64-06-07

SUBJECT HEADING:   Airworthiness Directives; VERTOL All Model 107-II Helicopters

ACTION:  

SUMMARY:  

DATES:   Effective March 7, 1964.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
64-06-07 VERTOL: Amdt. 697 Part 507 Federal Register March 7, 1964. Applies to All Model 107-II Helicopters.

Compliance required within 25 hours' time in service after the effective date of this AD.

To prevent recurrence of a serious lurching condition which has been encountered on this model helicopter, modify each stability augmentation system to derive a.c. power from its respective generator instead of the essential bus, as follows:

Remove the present a.c. electrical circuit wiring from terminals A3 and B3 of the a.c. instrument relay and from the "B" phase of the a.c. bus. Connect terminals A3 and B3 of the instrument relay to the terminal T2 of the a.c. feeder relay No. 1 and a.c. feeder relay No. 2 respectively.

(Vertol 107-II Service Bulletin No. 107-118 dated December 6, 1963, covers the same subject.)
This directive effective March 7, 1964.

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