AD 86-11-03

AD Final Rules - DRS_86-11-03.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
86-11-03
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
ROLLS-ROYCE LIMITED Models Spey 555-15, -15H, - 15N, and -15P Engines
Subject:
Stage 12 HPC Disks And Rotor Seals, And LPC Drive Shafts
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
06/20/1986
Make:
Rolls-Royce Deutschland Ltd & Co KG
Model:
Spey 555-15 | Spey 555-15H | Spey 555-15N | Spey 555-15P
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Superseded AD: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Superseded By: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: 86-11-03
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-5301

AD NUMBER:   86-11-03

SUBJECT HEADING:   ROLLS-ROYCE LIMITED Models Spey 555-15, -15H, - 15N, and -15P Engines

ACTION:  

SUMMARY:  

DATES:   Effective June 20, 1986.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
86-11-03 ROLLS-ROYCE LIMITED: Amendment 39-5301. Applies to Rolls-Royce Spey 555-15, -15H, - 15N, and -15P turbofan engines.

Compliance is required as indicated unless already accomplished.

To prevent possible failure of the stage 12 high pressure compressor (HPC) disk, stage 12 HPC rotor seal, and low pressure compressor (LPC) drive shaft (Pre-Mod. 4927), accomplish the following in accordance with Rolls-Royce Service Bulletin (SB) Sp 72-969, dated May 1984, or FAA approved equivalent:

Remove stage 12 HPC disks and rotor seals, and LPC drive shafts (Pre-Mod. 4927) from service on or before accumulating the cyclic lives (flights) specified below. Parts which have accumulated more cycles in service than those specified below on the effective date of this AD, must be removed prior to further flight.

CYCLIC LIVES


PART
DESCRIPTION	MODIFICATION	A*
NUMBER
OF FLIGHTS	B*
NUMBER
OF FLIGHTS	C*
NUMBER
OF FLIGHTS	D*
NUMBER
OF FLIGHTS	E*
NUMBER
OF FLIGHTS	F*
NUMBER
OF FLIGHTS
High Pressure Compressor Stage 12 Rotor Disks and Seals		13,800	15,600	17,600	19,700	22,100	17,300
Low Pressure
Compressor

Rotor Drive Shaft	Pre-Mod



4927	10,800	10,800	11,500	12,600	14,400	11,200

*NOTE: Cyclic lives for each component are for flight profiles as denoted by A through F and defined below:
For engines with no N2 monitoring:

A. Spey 555-15 and 555-15N full throttle

Spey 555-15H and 555-15P rated takeoff

For engines with N2 monitoring:

B. Where 85 percent of takeoffs do not exceed 100 percent N2

C. Where 85 percent of takeoffs do not exceed 99 percent N2

D. Where 85 percent of takeoffs do not exceed 98 percent N2

E. Where 85 percent of takeoffs do not exceed 97 percent N2

F. Datum profile, average 99.5 percent N2

Aircraft may be ferried in accordance with the provisions of FAR Sections 21.197 and 21.199 to a base where the AD can be accomplished.

Rolls-Royce SB Sp 72-969, dated May 1984, identified and described in 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 the Service Manager, Spey Engine, Rolls-Royce Limited, East Kilbride, Glasgow G74-4PY, Scotland. This document also may be examined at the Office of the Regional Counsel, New England Region, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803, Room Number 311, between the hours of 8:00 a.m. and 4:30 p.m., Monday through Friday except Federal holidays.

This amendment becomes effective on June 20, 1986.

FOOTER: