AD 87-12-06

AD Final Rules - DRS_87-12-06.html
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AD Number:
87-12-06
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A/B Series Helicopters
Subject:
Generator Control Unit
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
06/10/1987
Make:
Sikorsky Aircraft Corporation
Model:
S-76A | S-76B
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Superseded AD: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Superseded By: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: 87-12-06
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-5602

AD NUMBER:   87-12-06

SUBJECT HEADING:   Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A/B Series Helicopters

ACTION:  

SUMMARY:  

DATES:   Effective June 10, 1987.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
87-12-06 SIKORSKY AIRCRAFT: Amendment 39-5602. Applies to all Model S-76A/B series helicopters, certified in all categories.

Compliance is required within the next 25 hours' time in service unless already accomplished.

To prevent possible loss of electrical power due to DC generator ground failure, accomplish the following:

(a) Perform inspection to determine the wiring configuration and connections of the GCU. Inspect the ground and power path connections of both generators for corrosion and proper torque, and inspect the ground connections of the GCU to determine their configuration. Modify and repair, as necessary. Accomplish these inspections and modifications in accordance with the Sikorsky Alert Service Bulletin, ASB-76-24-8, dated January 30, 1987.

(b) Upon request, with substantiating data, an alternate means of compliance which provides an equivalent level of safety or adjustment in the compliance time may be used when approved by the Manager, Boston Aircraft Certification Office, Aircraft Certification Division, Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, MA 01803.

These procedures shall be accomplished in accordance with Sikorsky ASB-76-24-8, dated January 30, 1987. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a)(1). Copies may be obtained from Sikorsky Aircraft, 6900 North Main Street, Stratford, Connecticut 06601-1381. Copies may be inspected at the Office of the Regional Counsel, FAA, Southwest Region, 4400 Blue Mound Road, Fort Worth, Texas, or at the Office of the Federal Register, 1100 L Street, NW., Room 8401, Washington, D.C.

This amendment becomes effective June 10, 1987.

FOOTER: