AD 78-07-08

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AD Number:
78-07-08
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
ROLLS ROYCE, LTD. Models Dart 542-4, 542-10, and 543-10 Engines Series
Subject:
Flame Tube Liners And Suspension Pins
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
05/03/1978
Make:
Rolls-Royce Deutschland Ltd & Co KG
Model:
Dart 542-10 | Dart 542-4
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Superseded AD: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Superseded By: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: 78-07-08
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-3171

AD NUMBER:   78-07-08

SUBJECT HEADING:   ROLLS ROYCE, LTD. Models Dart 542-4, 542-10, and 543-10 Engines Series

ACTION:  

SUMMARY:  

DATES:   Effective May 3, 1978.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
78-07-08 ROLLS ROYCE, LTD.: Amendment 39-3171. Applies to Dart engines Series 542-4, 542-10, 543-10, and variants, featuring any of the following, Modifications 1243, 1244, 1432, 1448, or 1607, used on, but not limited to Convair 600 and 640 aircraft, and Nihon YS-11 and YS-11A series aircraft.

Compliance is required as indicated.

To prevent excessive wear in flame tube liners and suspension pins that may result in loss of flame tube support causing overheating and failure of the turbine rotors, accomplish the following:

(a) Within the next 500 hours engine time in service after the effective date of this AD, unless already accomplished, inspect the flame tube liners and suspension pins for wear in accordance with the instructions contained in paragraph 4A of Rolls Royce Dart Service Bulletin Da 72-431, dated July 1, 1977 (hereafter RR SB 72-431), or an equivalent approved by the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region, c/o American Embassy, APO New York, New York 09667 (hereafter FAA-approved equivalent).

(b) If, during an inspection required by this AD, flame tube liner or suspension pin wear is found to exceed the limits given in paragraph 4A(1) of RR SB 72-431, or an FAA-approved equivalent, before further flight, except that the aircraft may be flown in accordance with FAR Sections 21.197 and 21.199 to a base where the work can be performed, replace the affected part with a serviceable part and reinspect in accordance with either paragraph (c) or (d) of this AD, as applicable.

(c) If, during an inspection required by this AD, flame tube liner wear is 0.030 or greater inches on any one flame tube of any engine in the operator's fleet, determine the flame tube time in service since new or overhauled, and establish a fleet repetitive inspection time interval in accordance with paragraph 4.A(1)(c)(ii) or 4.A(2) as applicable, of RR SB 72-431 or an FAA-approved equivalent.

(d) If, during an inspection required by this AD, flame tube liner wear is less than 0.030 inches on any one flame tube of any engine in the operator's fleet, replace, if necessary, the affected parts according to paragraph (b) of this AD and reinspect in accordance with paragraph 4.A(4) of RR SB 72-431, or an FAA- approved equivalent, at intervals not to exceed 2000 hours engine time in service from the last inspection.

(e) If, during a repetitive inspection required by paragraph (c) or (d) of this AD, flame tube liner wear is 0.030 or greater inches on any one flame tube of an engine in the operator's fleet, reduce the Repetitive Inspection Interval for all engines in the fleet in accordance with paragraph 4.A(2) of RR SB 72-431, or an FAA-approved equivalent.

(f) Record the repetitive inspection time intervals established pursuant to paragraphs (c), (d), and (e) in the aircraft maintenance records.

This amendment becomes effective May 3, 1978.

FOOTER: