AD 78-11-03

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AD Number:
78-11-03
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
PRATT & WHITNEY AIRCRAFT Model JT3D Engines
Subject:
First Stage Fan Blades
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
08/10/1978
Make:
Pratt & Whitney Division
Model:
JT3D-1 | JT3D-1-MC6 | JT3D-1-MC7 | JT3D-1A | JT3D-1A-MC6 | JT3D-1A-MC7 | JT3D-3 | JT3D-3B | JT3D-3C ...Show more
Product Type:
Engine
Product Subtype:
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 78-11-03
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-3224

AD NUMBER:   78-11-03

SUBJECT HEADING:   PRATT & WHITNEY AIRCRAFT Model JT3D Engines

ACTION:  

SUMMARY:  

DATES:   Effective August 10, 1978.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
78-11-03 PRATT & WHITNEY AIRCRAFT: Amendment 39-3224. Applies to all Pratt & Whitney Aircraft JT3D turbofan engine models.

Compliance required not later than March 1, 1980, unless already accomplished.

To preclude failures of first stage fan blades due to forging laps, which could result in aircraft damage, perform a one-time blue etch anodize inspection of the blades in accordance with the procedures given in Pratt & Whitney Alert Service Bulletin 4733, dated May 5, 1977, or later FAA approved revision, and Special Instruction 2F-77, dated January 28, 1977, or later FAA approved revision.

Fan blades that exhibit blue etch linear indications in the inspection areas shown in Figure 1 of ASB 4733 must be reworked or scrapped in accordance with the forging lap repair limits established in Figure 2 of ASB 4733, dated May 5, 1977, or later FAA approved revision.

NOTE: The AD does not change the present fan blade blend limits given in the JT3D engine manual.

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 Pratt & Whitney Aircraft, Division of United Technologies Corporation, 400 Main Street, East Hartford, Connecticut 06108. These documents may also be examined at Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803, and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C.

This amendment becomes effective August 10, 1978.

FOOTER: