AD 70-16-08

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AD Number:
70-16-08
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
DOWTY ROTOL, LIMITED Models (c) R.175/4-30-4/13E, (c) R.193/4-30-4/50, and (c) R.209/4-40-4.5/2 Propellers
Subject:
Operating Pins
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
09/05/1970
Make:
Dowty Propellers
Model:
(c) R175/4-30-4/ | (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Superseded AD: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Superseded By: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:
Updated RGL applicability to match AD applicability; CAR C-11-185
AIRWORTHINESS DIRECTIVES FINAL RULES: 70-16-08
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-1060

AD NUMBER:   70-16-08

SUBJECT HEADING:   DOWTY ROTOL, LIMITED Models (c) R.175/4-30-4/13E, (c) R.193/4-30-4/50, and (c) R.209/4-40-4.5/2 Propellers

ACTION:  

SUMMARY:  

DATES:   Effective September 5, 1970.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:   70-16-08 DOWTY ROTOL, LIMITED: Amendment 39-1060. Applies to propeller types (c) R.175/4-30-4/13E, incorporating operating pins with part numbers RA.44996, RA.44996/1, or RA.44996/2, installed in but not necessarily limited to Fairchild Hiller F-27 and F-27B airplanes; (c) R.193/4-30-4/50, incorporating operating pins with part number RA.57505, installed in but not necessarily limited to Fokker F.27 Mark 400 and 600, and Fairchild Hiller F- 27A, F-27F, F-27G, F-27J, and FH-227 airplanes; , incorporating operating pins with part numbers RA.66033 or 601023087 installed on Nihon YS.11 and YS.11A airplanes.

Compliance is required as indicated.

To detect cracks in the fillet radius of the propeller operating pins at the junction between the pin diameter and flange, accomplish the following:

(a) For propeller types (c) R.175/4-30-4/13E and (c) R.193/4-30-4/50, at the next propeller overhaul or upon the accumulation of a total time in service of 5,000 hours since new or last overhaul, whichever occurs first, inspect the propeller operating pins for cracks in accordance with paragraph (c). If no cracks are found, this inspection must be repeated at each propeller overhaul or at intervals not to exceed 5,000 hours' time in service since the last inspection, whichever occurs first.

(b) For propeller type (c) R.209/4-40-4.5/2, at the next propeller overhaul or upon the accumulation of a total time in service of 4,000 hours since new or last overhaul, whichever occurs first, inspect the propeller operating pins for cracks in accordance with paragraph (c). If no cracks are found, this inspection must be repeated at each propeller overhaul or at intervals not to exceed 4,000 hours' time in service since the last inspection, whichever occurs first.

(c) Inspect the propeller operating pins for cracks in accordance with Dowty Rotol, Limited Service Bulletin No. 61-711, Revision 2, dated February 11, 1970, or later ARB- approved issue or an FAA-approved equivalent.

(d) If a crack is found in any operating pin during the inspections required by paragraph (a) or (b), the following must be accomplished:

(1) Remove all four operating pins and replace each of them with new serviceable operating pins, or with serviceable operating pins which have been inspected in accordance with paragraph (c) and which have not previously formed part of a set containing a cracked operating pin, prior to returning the propeller to service. In either case, the replacement pins must be pins that are approved for the particular type propeller.

(2) Re-inspect all other propellers of the same type in the operator's fleet in accordance with paragraph (c) as follows:

(i) For propeller types (c) R.175/4-30-4/13E and (c) R.193/4-30- 4/50, within the next 600 hours' time in service from the date of the inspection during which the cracks were found (for propellers with 1,400 or more hours' time in service since new or the last overhaul), or before the accumulation of 2,000 hours' time in service since new or the last overhaul (for propellers with less than 1,400 hours' time in service since new or the last overhaul), and thereafter at intervals not to exceed 2,000 hours' time in service since the last inspection.

(ii) For propeller type (c) R.209/4-40-4.5/2, within the next 400 hours' time in service from the date of the inspection during which the cracks were found (for propellers with 600 or more hours' time in service since new or the last overhaul), or before the accumulation of 1,000 hours' time in service since new or the last overhaul (for propellers with less than 600 hours' time in service since new or the last overhaul), and thereafter at intervals not to exceed 1,000 hours' time in service since the last inspection.

This amendment becomes effective September 5, 1970.

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