AD 81-10-09

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AD Number:
81-10-09
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model SA 365C Series Helicopters
Subject:
Tail Rotor Gearbox Mount Assembly
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
04/30/1981
Make:
Airbus Helicopters
Model:
SA-365C | SA-365C1 | SA-365C2
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Superseded AD: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Superseded By: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: 81-10-09
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-4106

AD NUMBER:   81-10-09

SUBJECT HEADING:   Airworthiness Directives; SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS) Model SA 365C Series Helicopters

ACTION:  

SUMMARY:  

DATES:   Effective April 30, 1981.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
81-10-09 SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS): Amendment 39-4106. Applies to Model SA 365C series helicopters, certificated in all categories, which have skid type landing gear P/N 365A82.1370 and/or P/N 365A82.1400 installed, and either do not have tail ballast installed in accordance with Aerospatiale Drawing 365MR0351, or are not modified in accordance with Aerospatiale Service Bulletin Dauphin No. 53.04, dated May 10, 1979.

Compliance required as indicated, unless already accomplished.

To prevent failure of the tail rotor gearbox tripod mount assembly, accomplish the following:

(a) Within the next five hours time in service after the effective date of this AD, and every five hours thereafter, and prior to the first flight of each day, inspect the tail rotor gearbox tripod mount assembly, P/N 360A23.0024 (hereinafter referred to as TRGB mount assembly) for cracks in accordance with Aerospatiale Work Card No. 53.10.605, dated March 1979, or an FAA- approved equivalent.

(b) If any crack or cracks are found, remove the TRGB mount assembly from service and replace with a new TRGB mount assembly, and thereafter inspect in accordance with paragraph (a) until compliance with paragraph (c) is accomplished.

(c) Within the next 100 hours time in service:

(1) Incorporate a tail ballast weight in accordance with Aerospatiale Dauphin Service Bulletin NO. 53.04, dated May 10, 1979, or an FAA-approved equivalent.

(2) Remove the tail rotor and tail rotor gearbox in accordance with Aerospatiale Work Card No. 65.42.401, dated March 1979, or an FAA-approved equivalent.

(3) Inspect the three leg-to-ring junction welds of the TRGB with Aerospatiale Standard Practice Manual, Section 02.80, dated August 1976, or an FAA-approved equivalent, and -

(i) If no cracks are found, reinstall the tail rotor and tail rotor gearbox in accordance with Aerospatiale Work Card No. 65.42.401, dated March 1979, or an FAA-approved equivalent, and return to service.

(ii) If any cracks are found, remove the TRGB mount assembly from service, replace with a new TRGB mount assembly, reinstall the tail rotor and tail rotor gearbox in accordance with Aerospatiale Work Card No. 65.42.401, or an FAA-approved equivalent, and return to service.

(d) After accomplishment of paragraph (c) of this AD, the inspection requirements of this AD may be discontinued.

(e) If an equivalent means of compliance is used in complying with this AD, that equivalent must be approved by the Chief, Aircraft Certification Staff, Europe, Africa, and Middle East Office, FAA, c/o American Embassy, Brussels, Belgium.

The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Societe Nationale Industrielle Aerospatiale (SNIAS), 37, blvd. de Montmorency, 75781 Paris Cedex 16, France. These documents may be examined at FAA Headquarters, Room 916, 800 Independence Avenue, SW., Washington, D.C. 20591.

This amendment becomes effective April 30, 1981, as to all persons except those persons to whom it was made immediately effective by the telegraphic AD issued May 25, 1979, which contained this amendment.

FOOTER: