AD 78-24-03

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AD Number:
78-24-03
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Societe Nationale Industrielle Aerospatiale Model SA 330 Helicopters
Subject:
Main Gear Box
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
11/24/1978
Make:
Airbus Helicopters
Model:
SA330F | SA330G | SA330J
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Superseded AD: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Superseded By: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: 78-24-03
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-3347

AD NUMBER:   78-24-03

SUBJECT HEADING:   Airworthiness Directives; Societe Nationale Industrielle Aerospatiale Model SA 330 Helicopters

ACTION:  

SUMMARY:  

DATES:   Effective November 24, 1978.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
78-24-03 SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE: Amendment 39- 3347. Applies to Model SA 330 Puma helicopters, certificated in all categories, that have accumulated less than 500 hours total time in service on their main gear boxes and have not incorporated Puma Modification AMS 07.51.103.

Compliance required before further flight, unless already accomplished, but helicopter may be flown in accordance with FAR 21.197 and 21.199 to a base where the required work can be performed.

To prevent failure of the main gear box input reduction gears due to excessive vibration, replace the main gear box with a gear box incorporating Puma Modification AMS 07.51.103 or accomplish the following:

(a) Determine the acceleration spectral level of the input reduction gears in accordance with the accomplishment instructions of Puma SA 330 Service Bulletin No. 01.21, dated July 12, 1977, or an FAA-approved equivalent.

(b) If the acceleration spectral level found during the test required by paragraph (a) of this AD measures 52db or more, replace the forward input reduction gears with gears incorporating Puma Modification AMS 07.51.103, or an FAA-approved equivalent.

(c) If the acceleration spectral level found during the test required by paragraph (a) of this AD measures less than 52db, the input reduction gears may remain in service if the operator receives written information from Aerospatiale that a spectral analysis shows the gears to be acceptable.

(d) Continue to comply with paragraphs (a) through (c) of this AD at intervals not to exceed 20 hours time in service until the gears have been replaced with gears incorporating Puma Modification AMS 07.51.103, or an FAA-approved equivalent.

This amendment is effective November 24, 1978, as to all persons except those persons to whom it was made immediately effective by the telegram dated May 19, 1978, which contained this amendment.

FOOTER: