AD 66-09-02

final rule

DOWTY ROTOL Models (c) R.193/4-30-4/50, (c) R.184/4- 30-4/50, and (c) R.179/4-20-4/33 Propellers

AD Number
66-09-02
Status
final_rule
Effective Date
Product Category
propeller
Docket
Unknown
FR Citation
This information is not available.
Technical illustration of an aircraft propeller assembly
Problem area Propeller

Applicability

TypeManufacturerModelDetails
aircraft Dowty Propellers (c) R179/4-20-4/ DOWTY ROTOL Models (c) R.193/4-30-4/50, (c) R.184/4- 30-4/50, and (c) R.179/4-20-4/33 Propellers
aircraft Dowty Propellers (c) R184/4-30-4/ DOWTY ROTOL Models (c) R.193/4-30-4/50, (c) R.184/4- 30-4/50, and (c) R.179/4-20-4/33 Propellers
aircraft Dowty Propellers (c) R193/4-30-4/ DOWTY ROTOL Models (c) R.193/4-30-4/50, (c) R.184/4- 30-4/50, and (c) R.179/4-20-4/33 Propellers
propeller Dowty Propellers (c) R179/4-20-4/ DOWTY ROTOL Models (c) R.193/4-30-4/50, (c) R.184/4- 30-4/50, and (c) R.179/4-20-4/33 Propellers
propeller Dowty Propellers (c) R184/4-30-4/ DOWTY ROTOL Models (c) R.193/4-30-4/50, (c) R.184/4- 30-4/50, and (c) R.179/4-20-4/33 Propellers
propeller Dowty Propellers (c) R193/4-30-4/ DOWTY ROTOL Models (c) R.193/4-30-4/50, (c) R.184/4- 30-4/50, and (c) R.179/4-20-4/33 Propellers

Unsafe Condition

Improper operation of the propeller pitch lock under high oil temperature conditions.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Rework the existing Lock Support Sleeve, Dowty Rotol P/N RA.61236, in accordance with Dowty Rotol Service Bulletin No. 61-185 or later ARB-approved revision.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

within the next 200 hours' time in service after the effective date of this AD unless already accomplished

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

Dowty Rotol Propellers models (c) R.193/4-30-4/50 installed on Fairchild F-27; (c) R.184/4-30-4/50 installed on Grumman G-159; and (c) R.179/4-20-4/33 installed on Viscount 810.

AI-generated summary from the source AD text. Verify against the official source before acting.

Federal Register Abstract

Pitch Lock

Applicability Source Text

Show captured applicability text from the source AD
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AD Number:
66-09-02
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
DOWTY ROTOL Models (c) R.193/4-30-4/50, (c) R.184/4- 30-4/50, and (c) R.179/4-20-4/33 Propellers
Subject:
Pitch Lock
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
06/16/1966
Make:
Dowty Propellers
Model:
(c) R179/4-20-4/ | (c) R184/4-30-4/ | (c) R193/4-30-4/
Product Type:
Propeller
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: 66-09-02
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-215

AD NUMBER:   66-09-02

SUBJECT HEADING:   DOWTY ROTOL Models (c) R.193/4-30-4/50, (c) R.184/4- 30-4/50, and (c) R.179/4-20-4/33 Propellers

ACTION:  

SUMMARY:  

DATES:   Effective June 16, 1966.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
66-09-02 DOWTY ROTOL: Amdt. 39-215 Part 39 Federal Register March 23, 1966. Applies to Dowty Rotol Propellers, (c) R.193/4-30-4/50, installed on Fairchild F-27; (c) R.184/4- 30-4/50, installed on Grumman G-159; and (c) R.179/4-20-4/33, installed on Viscount 810.

Compliance required within the next 200 hours' time in service after the effective date of this AD unless already accomplished.

To prevent further improper operation of the propeller pitch lock under high oil temperature conditions, rework the existing Lock Support Sleeve, Dowty Rotol P/N RA.61236, in accordance with Dowty Rotol Service Bulletin No. 61-185 (Modification No. (c) VP.2032) or later ARB-approved revision.

This directive effective April 22, 1966.

Revised June 16, 1966.

FOOTER:

Document Text

Show stored source text (verify against official source)
AD Final Rules - DRS_66-09-02.html
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Details
AD Number:
66-09-02
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
DOWTY ROTOL Models (c) R.193/4-30-4/50, (c) R.184/4- 30-4/50, and (c) R.179/4-20-4/33 Propellers
Subject:
Pitch Lock
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
06/16/1966
Make:
Dowty Propellers
Model:
(c) R179/4-20-4/ | (c) R184/4-30-4/ | (c) R193/4-30-4/
Product Type:
Propeller
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: 66-09-02
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-215

AD NUMBER:   66-09-02

SUBJECT HEADING:   DOWTY ROTOL Models (c) R.193/4-30-4/50, (c) R.184/4- 30-4/50, and (c) R.179/4-20-4/33 Propellers

ACTION:  

SUMMARY:  

DATES:   Effective June 16, 1966.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
66-09-02 DOWTY ROTOL: Amdt. 39-215 Part 39 Federal Register March 23, 1966. Applies to Dowty Rotol Propellers, (c) R.193/4-30-4/50, installed on Fairchild F-27; (c) R.184/4- 30-4/50, installed on Grumman G-159; and (c) R.179/4-20-4/33, installed on Viscount 810.

Compliance required within the next 200 hours' time in service after the effective date of this AD unless already accomplished.

To prevent further improper operation of the propeller pitch lock under high oil temperature conditions, rework the existing Lock Support Sleeve, Dowty Rotol P/N RA.61236, in accordance with Dowty Rotol Service Bulletin No. 61-185 (Modification No. (c) VP.2032) or later ARB-approved revision.

This directive effective April 22, 1966.

Revised June 16, 1966.

FOOTER:

Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

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