AD 73-08-01

AD Final Rules - DRS_73-08-01.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
73-08-01
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; BOEING VERTOL Model 107-II Type Helicopters
Subject:
Aft Transmission Quill Shaft
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
03/11/1975
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Superseded AD: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Superseded By: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: 73-08-01
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-2120

AD NUMBER:   73-08-01

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

ACTION:  

SUMMARY:  

DATES:   Effective March 11, 1975.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
73-08-01 BOEING VERTOL: Amendment 39-1618 as amended by Amendment 39-2120. Applies to all 107-II type helicopters.

Compliance required as indicated unless already accomplished.

In order to detect surface defects which can cause complete failure of the P/N 107D2067 aft transmission quill shaft, accomplish the following:

1. Within 25 flight hours after the effective date of this AD, inspect and code mark, in accordance with paragraph 3, all P/N 107D2067-1 or -3 quill shafts having 600 hours total time except those quill shafts specified in Service Bulletin A107-320, Revision C.

2. Quill shafts with less than 600 hours total time, except those quill shafts specified in Service Bulletin A107-320, Revision C, must comply with paragraph 3 prior to accumulating 600 hours total time in service.

3. Strip quill shaft at the .375 inch diameter pin hole; inspect under microscope magnification, code mark acceptable units with suffix letter "R" and apply surface treatments in accordance with Boeing-Vertol Telex 8-1420-1-291 dated 16 November 1972, or Service Bulletin No. A107-320 dated April 30, 1973, and subsequent approved revisions, or an equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. Inspect for surface pits, arc burns and cracks. Replace any quill shaft which has surface pits, arc burns or cracks with a shaft which has been inspected in accordance with this paragraph or a shaft referenced in Service Bulletin No. A107-320, Revisions A and C. (Boeing-Vertol Service Bulletin Nos. A107-320A, A107-320B and A107-320C, and Boeing Vertol Telex Nos. 8-1420-1- 268 and 8-1420-1-254 and available specimen photographs pertain to this subject.)

Amendment 39-1618 was effective April 9, 1973.
This amendment 39-2120 is effective March 11, 1975.

FOOTER: