AD 80-23-01

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AD Number:
80-23-01
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
ROLLS-ROYCE, LTD. Models DART 506, 510, 511, 514, 515, 520, 525, 526, 527, 528, 529, 530, 531, 532, ...Show more
Subject:
Low Pressure Impellers
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
10/30/1980
Make:
Rolls-Royce Deutschland Ltd & Co KG
Model:
Dart 506 | Dart 510 | Dart 511 | Dart 511-7E | Dart 514 | Dart 514-7 | Dart 525 | Dart 525F | Dart 5...Show more
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Superseded AD: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Superseded By: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: 80-23-01
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-3966

AD NUMBER:   80-23-01

SUBJECT HEADING:   ROLLS-ROYCE, LTD. Models DART 506, 510, 511, 514, 515, 520, 525, 526, 527, 528, 529, 530, 531, 532, 533, 534, 535, 536, 542, 543, 550 Engines

ACTION:  

SUMMARY:  

DATES:   Effective October 30, 1980.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
80-23-01 ROLLS-ROYCE, LTD.: Amendment 39-3966. Applies to Rolls-Royce, Ltd., DART 506, 510, 511, 514, 515, 520, 525, 526, 527, 528, 529, 530, 531, 532, 533, 534, 535, 536, 542, 543, 550, and all variants turboprop engines.

Compliance required as indicated, unless already accomplished.

To preclude possible frettage fatigue failure of low pressure impellers, inspect for cracks and modify or remove from service all low pressure impellers installed in the following DART model engines:

1. DART 506, 510, 511, 514, 515, and their variants; and DART 520, 525, 526, 527, 528, 529, 530, 531, 532, 533, 534, 535, 536, 550, and all variants of these marks equipped with a low pressure impeller which has run previously in a DART 506, 510, 511, 514, 515, or any variant of these engines.

a. After November 30, 1980, no low pressure impeller may exceed 5,000 flight cycles since new without inspection for cracks and incorporation of Modification 1732, in accordance with Rolls-Royce DART Alert Service Bulletin No. Da72-A445, Revision 4, dated October 27, 1980. Remove from service low pressure impellers having crack indications.

b. After November 30, 1980, prior to further flight, all low pressure impellers for which the flight cycles since new cannot be positively established, must be inspected and modified to incorporate Modification 1732; in accordance with Rolls-Royce DART Alert Service Bulletin No. Da72-A445, Revision 4, dated October 27, 1980. Remove from service, low pressure impellers having crack indications.

c. Remove from service not later than May 31, 1981, all low pressure impellers which have not been inspected for cracks and do not have modification 1732 incorporated.

2. DART 520, 525, 526, 527, 528, 529, 530, 531, 532, 533, 534, 535, 536, 550, and their variants equipped with a low pressure impeller which has not run previously in a DART 506, 510, 511, 514, 515 or any variant of these engines.

a. After December 31, 1982, no low pressure impeller may exceed 9,000 flight cycles since new without inspection for cracks and incorporation of Modification 1732, in accordance with Rolls-Royce DART Alert Service Bulletin No. Da72-A445, Revision 4, dated October 27, 1980. Remove from service low pressure impellers having crack indications.

b. After December 31, 1982, prior to further flight, all low pressure impellers for which the flight cycles since new cannot be positively established, must be inspected and modified to incorporate Modification 1732, in accordance with Rolls-Royce DART Alert Service Bulletin No. Da72-A445, Revision 4, dated October 27, 1980. Remove from service low pressure impellers having crack indications.

c. Remove from service not later than December 31, 1984, all low pressure impellers which have not been inspected for cracks and do not have Modification 1732 incorporated.

3. DART 542 and 543 model engines and their variants.

a. After December 31, 1981, no low pressure impeller may exceed 9,000 flight cycles since new without inspection for cracks and incorporation of Modification 1732, in accordance with Rolls-Royce DART Alert Service Bulletin No. Da72-A445, Revision 4, dated October 27, 1980. Remove from service low pressure impellers having crack indications.

b. After December 31, 1981, prior to further flight, all low pressure impellers for which the flight cycles since new cannot be positively established, must be inspected and modified to incorporate Modification 1732, in accordance with Rolls-Royce DART Alert Service Bulletin No. Da72-A445, Revision 4, dated October 27, 1980. Remove from service low pressure impellers having crack indications.

c. Remove from service not later than December 31, 1983, all low pressure impellers which have not been inspected for cracks and do not have modification 1732 incorporated.

NOTE: For the purposes of this AD, a flight cycle is considered to be an engine operating sequence from takeoff to landing.

Airplanes may be ferried in accordance with the provisions of FAR 21.197 to a base where the AD can be accomplished.

Upon request of the operator, equivalent means of compliance with the requirements of this AD may be approved by the Chief, Engineering and Manufacturing Branch, FAA, New England.

The Manufacturer's Alert Service Bulletin identified and described in this directive is incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received this document from the manufacturer may obtain copies upon request to Technical Publications Department, Rolls-Royce, Ltd., East Kilbride G74 4PY, Scotland. The document may also be examined at Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, Massachusetts, 01803, and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C. A historical file on this AD which includes the incorporated material in full is maintained by the FAA at its Headquarters in Washington, D.C., and at the New England Region Office. Upon request of the operator, an FAA Maintenance Inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, FAA, New England Region, may adjust the compliance date(s) specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for that operator.

This amendment becomes effective October 30, 1980.

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