AD 73-19-01

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AD Number:
73-19-01
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; de Havilland Aircraft of Canada, Ltd., Model DHC-6 Series 100,200 and 300 Aircraft
Subject:
Prop Auto-feathering System
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
02/18/1974
Make:
Viking Air Limited
Model:
DHC-6-100 | DHC-6-200 | DHC-6-300
Product Type:
Aircraft
Product Subtype:
Small Airplane
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 73-19-01
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-1786

AD NUMBER:   73-19-01

SUBJECT HEADING:   Airworthiness Directives; de Havilland Aircraft of Canada, Ltd., Model DHC-6 Series 100,200 and 300 Aircraft

ACTION:  

SUMMARY:  

DATES:   Effective February 18, 1974.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
73-19-01 de HAVILLAND: Amendment 39-1709 as amended by Amendment 39-1786. Applies to de Havilland Aircraft of Canada, Ltd., Model DHC-6 aircraft Series 100 and 200, Serial Numbers 6 through 230 inclusive, incorporating propeller autofeather system installed in accordance with de Havilland Modification No. 6/1278 or Supplemental Type Certificate No. SA2608WE and Series 300 Serial Numbers 130, 210, 231 through 290 inclusive (less Serial Numbers 265, 270, 277, 281 and 283).

Compliance required within 200 hours after the effective date of this AD unless already accomplished.

To prevent inadvertent auto-feathering accomplish the following:

1. (a) Deactivate the auto-feather system by disconnecting the circuit breaker marked "PROP AUTO-FEATHER" in the panel behind the co-pilot's position.

(b) Install placard stating "Auto-feather System Deactivated" adjacent to auto-feather select switch.

(c) Revise Vmc speed on airspeed limitation placard above pilot's position as follows:


Series 100 (Long-Nose)
	
"68 kts. CAS"


Series 200
	
"68 kts. CAS"


Series 300
	
"70 kts. CAS"

2. The accomplishment of de Havilland Modifications Nos. 6/1472 and 6/1459 as applicable or an equivalent modification approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, nullifies the applicability of this airworthiness directive.

(MOT approved Flight Manual Supplements Nos. 13, 14, and 19 pertain to and validate aircraft operations under CAR 3 or SFAR 23.) (Note: Canadian Ministry of Transport Airworthiness Directives CF-73-4 and CA-73-9 cover the same subject.)

Amendment 39-1709 was effective September 11, 1973.
This Amendment 39-1786 is effective February 18, 1974.

FOOTER: