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██ ██ ALERT SER VICE
BULLETIN ENGINE - HUB,
TURBINE, FRONT - DO A
REPETITIVE ANGLE UL
TRASONIC SCAN
INSPECTION (AUSI) OF THE FRONT
TURBINE HUB FOR A MA TERIAL ANOMAL Y MODEL
APPLICA TION PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, PW4090-3
BULLETIN ISSUE
SEQUENCE PW4G-1 12 Series A72-367 A T A NUMBER 72-52-00 R TX/P&W
PROPRIET AR Y
INFORMA TION This document is the property of R TX Corporation — Pratt & Whitney (R TX/P&W).
Y ou may not possess, use, copy or disclose this document or any information in it, for any purpose, including without limitation to design, manufacture, or repair parts, or obtain F AA or other government approval to do so, without R TX/P&W's express written permission.
Neither receipt nor possession of this document alone, from any source, constitutes such permission.
Possession, use, copying or disclosure by anyone without R TX/P&W's express written permission is not authorized and may result in criminal and/or civil liability .
Export Classification:
Not subject to the EAR per 15 C.F .R.
Chapter 1, Part
734.3(b)(3).
Compliance Category 6 P&W Distribution Code 2641 June 20/24 PW4G-1 12-A72-367 Page 1 of 9 Published in United States of America
Summary The purpose of this Alert Service Bulletin is to do a repetitive Angle Ultrasonic Scan Inspection (AUSI) of the front turbine hub to identify possible material anomalies.
The source of the anomaly is thought to occur during the part manufacture.
This Alert Service Bulletin is part of a fleet management plan for material manufactured from powdered metal.
Planning Information Ef fectivity Data Engine Models Applicable PW4074D, PW4077D, PW4084D, PW4090, PW4090-3 Engine Serial No.
— All engines * This estimate of engine serial numbers will be revised, if necessary , when parts are installed in engines at Pratt & Whitney .
NOTE :
The engine serial number ef fectivity data and its related engine model identification contained in this Alert Service Bulletin are taken from the records of part(s) incorporation during initial manufacture.
After initial engine manufacture, but before final delivery , P&W may change part(s) in the engine or change the model identification of the engine.
Such action is recorded on F AA337 forms.
T o find Alert Service Bulletin PW4G-1 12-A72-367 models that are applicable, the owner/operator of the engine must compare the Service Bulletin List supplied with the engine as sent from P&W and the List of Changes incorporated at the Airframer from F AA337 forms to the Alert Service Bulletin PW4G-1 12-A72-367 Ef fectivity section.
The PW4090 Engine ef fectivity is also applicable to all the PW4090 de-rate models (PW4074D, PW4077D, and PW4084D) unless otherwise specified.
Concurrent Requirements There are no concurrent requirements.
Reason
1.
Problem:
The front turbine hubs that were shipped before revised inspection procedures can contain anomalies that af fect the part material.
2.
Cause:
It is possible that anomalies were introduced during the part manufacture which were not identified by the inspection procedures available at that time.
3.
Solution:
Do a repetitive AUSI of the front turbine hubs that can identify material anomalies.
Description Do a repetitive AUSI of the front turbine hubs.
Compliance Category 6 Do a repetitive AUSI of the front turbine hubs when the subassembly
(i.e.
modules, accessories, components, build groups) is disassembled suf ficiently to give access to the front turbine hubs.
June 20/24 PW4G-1 12-A72-367 Page 2
RTX/P&W
PROPRIET AR Y
INFORMA TION Not subject to the EAR per 15 C.F .R.
Chapter 1, Part
734.3(b)(3).
Approval Data The part number changes and/or part changes specified in the Material Information section and Accomplishment Instructions of this Alert Service Bulletin agree with the applicable Federal A viation Regulations and are F AA-Approved for the engine model(s) given.
The times between inspections specified in Compliance and the inspection procedures specified in the Accomplishment Instructions agree with the applicable Federal A viation Regulations and are F AA-Approved for the engine model(s) given.
Manpower The estimate of man-hours of labor directly necessary to do the intent of this Alert Service Bulletin are as follows:
1.
Necessary to Clean the Front T urbine Hub .
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2.0 hours.
2.
Necessary to Do a Fluorescent Penetrant Inspection (FPI) of the Front T urbine Hub .
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3.0 hours.
3.
T otal Necessary Man-hours .
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5.0 hours.
W eight Data No Change.
Electrical Load Data Not Applicable.
Software Accomplishment Summary Not Applicable.
References
1.
T urbojet Engine Standard Practices Manual, Part No.
585005.
2.
PW4074, PW4077 T urbofan Engines, Illustrated Parts Catalog, Part No.
51A346.
3.
PW4074D, PW4077D, PW4084D, PW4090, PW4090-3, PW4090D, PW4098 T urbofan Engines, Illustrated Parts Catalog, Part No.
51A742.
4.
PW4074, PW4077 T urbofan Engines, Engine Manual, Part No.
51A345.
5.
PW4074D, PW4077D, PW4084D, PW4090, PW4090-3, PW4090D, PW4098 T urbofan Engines, Engine Manual, Part No.
51A751.
6.
PW4000 Series 1 12 Inch PW4074, PW4077, PW4077D, PW4084D, PW4090, PW4098 T urbofan Engines, Engine Cleaning, Inspection And Repair (CIR) Manual, Part No.
51A750.
7.
Non-Destructive Inspection Procedure (NDIP) NDIP-1273, dated March 20, 2024, or the latest approved F AA revision.
8.
Non-Destructive Inspection Procedure (NDIP) NDIP-1288, dated March 26, 2024, or the latest approved F AA revision.
Publications Changed PW4074, PW4077 T urbofan Engines, Illustrated Parts Catalog, Part No.
51A346.
72-52-00, Figure 1 June 20/24 PW4G-1 12-A72-367 Page 3
RTX/P&W
PROPRIET AR Y
INFORMA TION Not subject to the EAR per 15 C.F .R.
Chapter 1, Part
734.3(b)(3).
PW4074D, PW4077D, PW4084D, PW4090, PW4090-3, PW4090D, PW4098 T urbofan Engines, Illustrated Parts Catalog, Part No.
51A742.
72-52-00, Figure 1 Interchangeability Not Applicable.
Information in the Appendix Alternate Accomplishment Instructions (No) Progression Charts (No) Added Data (Y es) Revision to T able of Limits (No) Inspection Procedures (No) June 20/24 PW4G-1 12-A72-367 Page 4
RTX/P&W
PROPRIET AR Y
INFORMA TION Not subject to the EAR per 15 C.F .R.
Chapter 1, Part
734.3(b)(3).
Material Information Material — Cost and A vailability
1.
Part prices were not available at the time of this Alert Service Bulletin publication.
Contact Pratt & Whitney Spares Management & Logistics for firm quotations.
2.
There is no kit provided to do this Alert Service Bulletin.
3.
Part availability information is provided in material data Instructions — Disposition.
Industry Support Program Not Applicable.
The material data that follows is for each engine.
NOTE :
It is possible to use the Chapter/Section and Figure/Item reference number shown below the old part number to find the part in the Illustrated Parts Catalog.
Because there are many dif ferent configurations used, it is frequently necessary to show more than one group of parts.
When this occurs, parts that are interchangeable are shown line-by-line only , unless this is shown dif ferently .
CAUTION :
THE
FOLLOWING MA TERIAL DA T A T
ABLE(S) ARE
ORGANIZED BY
ILLUSTRA TED P AR TS CA T ALOG.
ALL P AR TS IN THE T
ABLE(S) MA Y OR MA Y NOT BE
APPLICABLE T O ALL THE ENGINE MODELS SHOWN IN THE T ABLE HEADING.
YOU MUST REFER T O THE
APPROPRIA TE
ILLUSTRA TED P AR TS CA T ALOG FOR ENGINE MODEL
APPLICABILITY USING THE OLD P AR T NUMBER (PN) AND CA T ALOG
SEQUENCE NUMBER.
F AILURE T O INST ALL THE P AR T(S) IN THE
CORRECT ENGINE MODEL MA Y RESUL T IN A
CONFIGURA TION THA T IS NOT F AA APPROVED.
The material data that follows is for each engine.
For PW4074, PW4077 Engines:
New PN Qty Estimate of Unit Price ($) Keyword Old PN Instructions — Disposition 1 * HUB —
TURBINE, FRONT 55L801
(4) The material data that follows is for each engine.
For PW4074D, PW4077D, PW4084D, PW4090, PW4090-3 Engines:
New PN Qty Estimate of Unit Price ($) Keyword Old PN Instructions — Disposition 1 * HUB —
TURBINE, FRONT 55L901
(4) June 20/24 PW4G-1 12-A72-367 Page 5
RTX/P&W
PROPRIET AR Y
INFORMA TION Not subject to the EAR per 15 C.F .R.
Chapter 1, Part
734.3(b)(3).
Modification and Spares Information Estimated part prices are provided when they are available at time of publication.
The Estimate of Unit Price is only for planning purposes and does not constitute a firm quotation.
An asterisk (*) is shown where part pricing information was unavailable.
In either case, contact Pratt & Whitney Spares Management & Logistics for firm quotations.
Parts Modification Conditions
(4) Do an inspection as specified in the Accomplishment Instructions.
Spare Parts A vailability Not Applicable.
V endor Services or Special Components/Materials Operators seeking an approved repair station to modify parts af fected by this Alert Service Bulletin may contact Pratt & Whitney/Repair Supplier Logistics/Engineering Manager via email:
rsl.engineering@pw .utc.com.
V endor Services or Special Components/Materials P&W Designation V endor Designation Name V endor Name & Address 55L801 HUB —
TURBINE, FRONT
PROFESSIONAL NDE SER VICES, LLC 3975 POR T UNION ROAD F
AIRFIELD, OH 45014 USA 55L901 HUB —
TURBINE, FRONT
PROFESSIONAL NDE SER VICES, LLC 3975 POR T UNION ROAD F
AIRFIELD, OH 45014 USA V endor Manufacturer's Code:
171943 See Illustrated Parts Catalog V endor Manufacturer's Code List NOTE :
EXCEPT FOR WORK OR
SUPPLIES T O BE
PERFORMED OR
FURNISHED BY PRA TT &
WHITNEY , IT IS
UNDERST OOD THA T PRA TT &
WHITNEY DOES NOT
ENDORSE THE WORK
PERFORMED BY THE COMP ANY OR COMP ANIES NAMED HEREIN OR ANY OTHER COMP ANY AND DOES NOT ACCEPT
RESPONSIBILITY T O ANY DEGREE FOR THE
SELECTION OF SUCH COMP ANY OR COMP ANIES FOR THE
PERFORMANCE OF ANY WORK OR
PROCUREMENT OF SUPPLIES.
Material Data for Each Spare Engine The material for each spare engine is as stated in the preceding material information section.
Other Material Information Data Not Applicable.
June 20/24 PW4G-1 12-A72-367 Page 6
RTX/P&W
PROPRIET AR Y
INFORMA TION Not subject to the EAR per 15 C.F .R.
Chapter 1, Part
734.3(b)(3).
Accomplishment Instructions NOTE :
Perform the following inspection at piece part level.
1.
Remove the Front T urbine Hub, PN 55L801 or 55L901 as specified in Reference 4, T urbofan Engines, Engine Manual, Chapter/Section 72-52-01, Disassembly-01.
See Figure
1.
2.
Clean the Front T urbine Hub, PN 55L801 or 55L901 as specified in Reference 6, CIR Manual, T ask 72-52-00, Cleaning-01.
3.
Do an FPI of the front turbine hub as specified in Reference 6, CIR Manual, T ask 72-52-00, Inspection/Check-02.
4.
Send the front turbine hub to an approved source specified in the V endor Services section of this Alert Service Bulletin for the AUSI.
A.
For the Front T urbine Hub, PN 55L801, the vendor will do the AUSI as specified in Reference 7, NDIP-1273 and return the part.
B.
For the Front T urbine Hub, PN 55L901, the vendor will do the AUSI as specified in Reference 8, NDIP-1288 and return the part.
5.
If the front turbine hub does not pass the AUSI, remove the part from service as specified in Reference 7, NDIP-1273, or Reference 8, NDIP-1288.
Contact Pratt & Whitney CTS for part return disposition.
6.
If the front turbine hub passes the AUSI as specified in Reference 7, NDIP-1273, or NDIP-1288, no further action is necessary .
7.
Install the Front T urbine Hub, PN 55L801 or 55L901 as specified in Reference 4, T urbofan Engines, Engine Manual, Chapter/Section 72-52-01, Assembly-01.
See Figure
1.
June 20/24 PW4G-1 12-A72-367 Page 7
RTX/P&W
PROPRIET AR Y
INFORMA TION Not subject to the EAR per 15 C.F .R.
Chapter 1, Part
734.3(b)(3).
000000 000009 55L801 OR 55L901
FRONT TURBINE HUB
DO AN INSPECTION
AS SPECIFIED IN THE
ACCOMPLISHMENT
INSTRUCTIONS B530410
LOCATION OF THE FRONT TURBINE HUB 72-52-00 FIGURE 1 June 20/24 PW4G-112-A72-367 Page 8
RTX/P&W PROPRIETARY INFORMATION Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Appendix Added Data Internal Reference Information Revision No.
Reference Document Origination Original EA24KC167 BB/MSS Number values shown in parentheses adjacent to U.S.
values are International System of units (SI) equivalents.
June 20/24 PW4G-1 12-A72-367 Page 9
RTX/P&W
PROPRIET AR Y
INFORMA TION Not subject to the EAR per 15 C.F .R.
Chapter 1, Part
734.3(b)(3).