ALERT SERVICE BULLETIN REVISION NOTICE

ENGINE FUEL AND CONTROL — FUEL NOZZLE TO FUEL NOZZLE SUPPLY MANIFOLD

INTERFACE — INSPECTION FOR FUEL LEAKS, SOOT AND COKE FORMATION, AND

INCORPORATION OF AN INCREASED TUBE COUPLING NUT (B-NUT) TORQUE

Turbojet Engine Service Bulletin No. PW4G-100-A73-44 Revision No. 1 dated February 12, 2015.

Revision History

Original Issue October 10, 2014

Revision 1 dated February 12, 2015

Reason for the Revision

To change “All engines” to “Engine Serial Nos. P735001 thru P735161” for the PW4168A-1D and

PW4170 engine models in the Planning Information section.

To change the Added Data section to indicate the engine manual has been updated with the new

torque values.

To correct service bulletin prefix “PW4ENG” to “PW4G” in the Problem.

To correct the Aircraft Type Certificate holder statement in the Approval Data section.

Effect of Revision on Prior Compliance

None.

This is a Complete Revision (Not Applicable to the SGML version)

The contents are in accordance with the list of effective pages. All pages have the current revision

number. Technical changes are marked with black bars.

MODEL APPLICATION

PW4164, PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, PW4170

BULLETIN ISSUE SEQUENCE

PW4G-100 Series A73-44

Page Revision No. Date

1 thru 23 1 February 12/15

A copy of this Revision Notice and any future revision notices must be filed as a permanent

record with your copy of the subject bulletin.

P&W Distribution Code

2639 PW4G-100-A73-44

Page 1 of 1

Published in United States of America

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
ALERT SERVICE BULLETIN

ENGINE FUEL AND CONTROL — FUEL NOZZLE TO FUEL NOZZLE SUPPLY MANIFOLD

INTERFACE — INSPECTION FOR FUEL LEAKS, SOOT AND COKE FORMATION, AND

INCORPORATION OF AN INCREASED TUBE COUPLING NUT (B-NUT) TORQUE

MODEL APPLICATION

PW4164, PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, PW4170

BULLETIN ISSUE SEQUENCE

PW4G-100 Series A73-44

ATA NUMBER

73-11-00

UTC/P&W PROPRIETARY INFORMATION

This document is the property of United Technologies Corporation — Pratt & Whitney (UTC/P&W). You 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 FAA or other government approval to do so, without UTC/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 UTC/P&W’s express written permission is not authorized

and may result in criminal and/or civil liability.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).

Compliance Category

3

P&W Distribution Code

2639

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Published in United States of America
Summary

The purpose of this Service Bulletin is to provide a fleet management plan to address PW4000-100”

engine fuel system leaks. There have been ten (10) occurrences of fuel leaks and all occurrences

were on engines installed with the Talon IIB combustor chamber configuration. The investigation of

these fuel leaks has identified that the leak occurs at the B-nut connection interface between the

fuel supply manifold and fuel injector support (fuel nozzle). This Service Bulletin recommends a

one-time increased re-torque of the B-nut be completed as soon as possible but no later than

November 1, 2015. As an interim measure, this Service Bulletin recommends a visual inspection

be performed within the next A-check interval followed by repetitive inspections until the increased

torque application is implemented.

NOTE: In Pratt & Whitney Manuals and Service Bulletins, the terms “Fuel Nozzles” and “Fuel

Injectors” are used interchangeably. “Tube Coupling Nuts” and “B-nuts” are also used

interchangeably.

Planning Information

Effectivity Data

Engine Models Applicable

PW4164, PW4168, PW4168A

Engine Serial Nos. — All Engines that have incorporated Reference 5, Service Bulletin

PW4G-100-72-214, or Reference 6, Service Bulletin PW4G-100-72-219, or Reference 8,

Service Bulletin PW4G-100-72-220.

PW4168A-1D, PW4170

Engine Serial Nos. P735001 thru P735161

This Service Bulletin also applies to engines converted to the PW4164-1D, PW4168-1D,

PW4168A-1D, PW4170 models by Reference 8, Service Bulletin PW4G-100-72-220.

Concurrent Requirements

There are no concurrent requirements.

Reason

1. Problem: Ten (10) PW4000-100 inch engines have experienced fuel leaks at the

fuel nozzle to fuel supply manifold connection interface. Four (4) of these fuel leaks

resulted in fire warning during flight while the remaining leaks were found during

post flight or test cell troubleshooting for fuel leaking. All ten fuel leak occurrences

were on engines installed with the Talon IIB combustor chamber configuration. This

combustion chamber configuration is used in all PW4000-100 inch engines post

Reference 5, SB PW4G-100-72-214, Reference 6, SB PW4G-100-72-219 and

Reference 8, SB PW4G-100-72-220, and production PW4168A-1D and PW4170

engines.

2. Cause: The Investigation of these fuel leaks has identified that the leak occurs at

the B-nut connection interface between the fuel supply manifold and fuel nozzle.

Temperature combined with operational loading pressures and low and high cycle

stresses reduces clamping load below the minimum requirement for effective outer

conical seat sealing.

3. Solution: Perform a one-time re-torque (increased torque) of the B-nut connection

interface between the fuel supply manifold and fuel nozzle per the accomplishment

instructions. In the interim time frame before the increased torque procedure is

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October 10/14

PW4G-100-A73-44

REVISION NO. 1 - February 12/15 Page 2

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
accomplished; perform a visual inspection within next A-check interval. Perform a

repetitive visual inspection at each A-check until the increased torque is implemented.

Description

Inspect the fuel nozzle to fuel supply manifold connection interfaces for fuel leaks, and

soot or coke formation. Replace leaking fuel injectors and associated fuel injector supply

manifolds. Loosen all of the B-nuts and apply an increased torque.

Compliance

Category 3

Part A

Do by the next ’A’ check and at every subsequent ’A’ check until Part B or Part C or Part

D or Part E of this service bulletin has been completed.

Incorporation of Part B, or Part C, or Part D, or Part E is closing action for the Part A

repetitive inspection.

Parts B, C, D, and E

For Engines with more than 2500 cycles*

Do as soon as possible but no later than January 31, 2015

For Engines with 1500 – 2500 cycles*

Do as soon as possible but no later than May 31, 2015

For Engines with less than 1500 cycles*

Do as soon as possible but no later than November 1, 2015

*For the purpose of this Service Bulletin the cycles are defined as since new (1st run) or

since last torque application to the B-nuts on the fuel nozzle installation.

Approval Data

The part number changes and/or part changes specified in the Material Information section

and Accomplishment Instructions of this Service Bulletin agree with the applicable Federal

Aviation Regulations and are FAA-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 Aviation

Regulations and are FAA-Approved for the engine model(s) given.

The aircraft TC holder has been informed of this change.

Manpower

The estimate of man-hours of labor directly necessary to do the intent of this Service

Bulletin are as follows:

1. Open and close cowl doors ................................................................................ 1.0

2. Necessary to gain access to the (24) fuel nozzle interfaces ............................ 12.0

3. Inspect (24) locations for leaks .......................................................................... 1.2

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October 10/14

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REVISION NO. 1 - February 12/15 Page 3

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
4. Necessary to loosen and re-torque 24 B-nuts and install safety wire ................ 7.2

5. Necessary to install removed hardware ........................................................... 25.6

6. Perform post-requisite testing............................................................................. 1.0

7. Total Necessary Man-hours ............................................................................. 48.0

NOTE: Additional man-hours will be required if fuel nozzles and fuel supply

manifold tubes need to be replaced.

Weight Data

No Change.

Electrical Load Data

Not Applicable.

Software Accomplishment Summary

Not Applicable.

References

1. Turbojet Engine Standard Practices Manual, Part No. 585005.

2. PW4164, PW4168, PW4168A, PW4170 Turbofan Engines, Illustrated Parts Catalog,

Part No. 51A343.

3. PW4164, PW4164-1D, PW4164C, PW4164C-1D, PW4164C/B, PW4164C/B-1D, PW4168,

PW4168-1D, PW4168A, PW4168A-1D, PW4170 Turbofan Engines, Engine Manual, Part

No. 51A342.

4. Airbus A330 Aircraft Maintenance Manual.

5. Service Bulletin No. PW4G-100-72-214; Engine — Chamber Assemblies, Inner And Outer

Combustion — Introduction Of The Talon IIB To Reduce Combustor Exit Temperature At

The Outer Diameter. Issue Sequence 72-214, PW4G-100 Series.

6. Service Bulletin No. PW4G-100-72-219; Engine — Modification Of, To Incorporate The

Advantage70TM Performance And Durability Upgrade Kit To Improve Engine Reliability And

Reduce Thrust Specific Fuel Consumption. Issue Sequence 72-219, PW4G-100 Series.

7. Service Bulletin No. PW4G-100-73-34; Engine Fuel And Control — Nozzle And Support

Assembly, Fuel — Replace With A New More Durable Fuel Nozzle And Support Assembly.

Issue Sequence 73-34, PW4G-100 Series.

8. Service Bulletin No. PW4G-100-72-220; Engine — Conversion Of A PW4164, PW4168,

Or PW4168A Engine To A PW4164-1D, PW4168-1D, PW4168A-1D, Or PW4170 Engine.

Issue Sequence 72-220, PW4G-100 Series.

NOTE: References 5 thru 7 are shown to help find configurations in relation to this

bulletin.

NOTE: Reference 8 is shown to help find non-production configurations that may

incorporate this bulletin.

Publications Changed

PW4164, PW4168, PW4168A, PW4170 Turbofan Engines, Illustrated Parts Catalog,

Part No. 51A343

73-11-00, Figures 5 and 6

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October 10/14

PW4G-100-A73-44

REVISION NO. 1 - February 12/15 Page 4

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
PW4164, PW4164-1D, PW4164C, PW4164C-1D, PW4164C/B, PW4164C/B-1D, PW4168,

PW4168A, PW4168A-1D, PW4170 Turbofan Engines, Engine Manual, Part No. 51A342.

71-00-73, Installation-15

72-41-00, Assembly-03

Interchangeability

Not Applicable.

Information in the Appendix

Alternate Accomplishment Instructions (No)

Progression Charts (No)

Added Data (Yes)

Revision to Table of Limits (No)

Inspection Procedures (No)

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October 10/14

PW4G-100-A73-44

REVISION NO. 1 - February 12/15 Page 5

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Material Information

Material — Cost and Availability

1. There is no new material cost to do this Service Bulletin if new fuel nozzles or fuel supply

manifolds are not required.

2. There is no kit provided to do this 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 different 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 differently.

CAUTION: THE FOLLOWING MATERIAL DATA TABLE(S) ARE ORGANIZED BY

ILLUSTRATED PARTS CATALOG. ALL PARTS IN THE TABLE(S) MAY OR

MAY NOT BE APPLICABLE TO ALL THE ENGINE MODELS SHOWN

IN THE TABLE HEADING. YOU MUST REFER TO THE APPROPRIATE

ILLUSTRATED PARTS CATALOG FOR ENGINE MODEL APPLICABILITY

USING THE OLD PART NUMBER (PN) AND CATALOG SEQUENCE

NUMBER. FAILURE TO INSTALL THE PART(S) IN THE CORRECT

ENGINE MODEL MAY RESULT IN A CONFIGURATION THAT IS NOT FAA

APPROVED.

The material data that follows is for each engine.

For PW4164, PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, PW4170 Engines:

New PN Qty Estimate of Unit

Price ($)

Keyword Old PN Instructions —

Disposition

24 INJECTOR

AND SUPPORT

ASSEMBLY —

FUEL

51J116

(73-11-00-5-10 D)

(3)(4)(N)(X)

OR

24 13,220.00 NOZZLE AND

SUPPORT

ASSEMBLY —

FUEL

51J345

(73-11-00-5-10 E)

(3)(4)(C)

24 38.60 GASKET

OPTION

ST1141-40

(73-11-00-5-1)

(C)(E)(O1)

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PW4G-100-A73-44

REVISION NO. 1 - February 12/15 Page 6

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
New PN Qty Estimate of Unit

Price ($)

Keyword Old PN Instructions —

Disposition

7 5,493.00 MANIFOLD

— ASSY OF,

SUPPLY, FUEL

INJECTOR (FS 1

– 3, 5 – 8)

50J959-01

(73-11-00-6-10 A)

(3)(4)(C)

1 5,125.00 MANIFOLD

— ASSY OF,

SUPPLY, FUEL

INJECTOR (FS

4)

50J958-01

(73-11-00-6-20 A)

(3)(4)(C)

24 5.39 PACKING —

PREFORM

ST1946-010

(73-11-00-6-1 B)

(C)(E)

AR 8.41 CABLE —

SAFETY

AS3510-0218C

(73-11-00-6-80 A)

(C)(E)(U)

AR 4.13 FERRULE —

SAFETY CABLE

AS3510-02F

(73-11-00-6-81)

(C)(E)(U)

AR 0.19 WIRE —

SAFETY

AS3214-02

(73-11-00-6-81)

(C)(E)(U)

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

(3) Replace as required based on results of the inspection in the Accomplishment

Instructions.

(4) Do an inspection as specified in the Accomplishment Instructions.

Spare Parts Availability

(C) The old part will continue to be supplied.

(E) The old part is an expendable item necessary to do this bulletin.

(N) The old part is not available.

(O1) Gasket Option, PN ST1141-40, consists of a Gasket, PN P13U51-0029-2, or

PN ST1121-40.

(U) Safety Cable and Safety Cable Ferrule are used together. Safety Wire may be

used in place of the Cable and Ferrule.

(X) See Reference 2, Illustrated Parts Catalog for applicable replacement parts.

Vendor Services or Special Components/Materials

Not Applicable.

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PW4G-100-A73-44

REVISION NO. 1 - February 12/15 Page 7

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Material Data for Each Spare Engine

The material for each spare engine is as stated in the preceding material information

section.

Reidentified Parts

Not Applicable.

Necessary Tools

Support Equipment available before

Tool No. Name Manufacturer

Various Flexible Borescope Various

Other Material Information Data

Engine Oil, PWA 521 (P03-001), is a consumable material that is required when replacing

parts in this Service Bulletin.

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October 10/14

PW4G-100-A73-44

REVISION NO. 1 - February 12/15 Page 8

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Accomplishment Instructions

Part A (For Engines On-Wing) — Do a repetitive inspection of the (24) fuel nozzle to fuel supply

manifold connection interfaces

NOTE: This Part is applicable until the re-torque of all (24) B-nuts is completed by the

applicable compliance date for Part B, C, D, or E.

1. Open the thrust reverser doors as specified in Reference (4), Airbus A330 Aircraft

Maintenance Manual (AMM).

2. Allow the engine to cool down to a working temperature.

3. Visually inspect the (24) fuel nozzle to fuel supply manifold connection interfaces for fuel

leaks and soot or coke formation. Use a flexible borescope to view locations that are

located in back of other hardware. See Figures 3 thru 6.

4. If signs of fuel leakage, or soot or coke formation is found at any location, do the following

steps:

NOTE: Replacement of hardware may be deferred, provided the affected area is cleaned

and the B-Nut(s) is/are torqued as specified in Part B., Step 3 and Steps 6 – 10,

but a high power (1.4 Engine Pressure Ratio) run must be accomplished to

ensure no leakage. If any leakage is observed after the high power run, the

affected hardware must be immediately replaced as specified below. If leakage

is not detected, a repeat inspection every 15 – 20 cycles is required of the

affected locations until this Service Bulletin is completed. However, if any further

fuel leakage, or soot or coke formation is found during the repetitive inspection,

the affected hardware must be immediately replaced as specified below.

A. Remove the effected fuel injector(s) and associated fuel injector supply manifold(s)

per Reference (4), AMM, Chapter/Section 73-11-15, Removal-01.

B. Install replacement fuel injector(s) per Reference (4), Airbus A330 Aircraft

Maintenance Manual, Chapter/Section 73-11-15, Installation-01.

(1) Discard the old gasket option and install a new Gasket Option, PN ST1141-40.

(2) Install a replacement Fuel Nozzle and Support Assembly, PN 51J345.

C. Install replacement fuel injector supply manifold(s) Reference (4), Airbus A330 Aircraft

Maintenance Manual, Chapter/Section 73-11-15, Installation-01, but use the following

steps:

(1) Discard the old packings and install new Packings, PN ST1946-010.

(2) Install a replacement Fuel Injector Supply Manifold, PN 50J959-01 or PN

50J958-01.

(3) Apply Engine Oil, PWA 521 (P03-001), to the threads of the fuel nozzle supply

manifold B-nuts. Include a few drops of oil to the B-nut thrust wire area (apply at

the top of the B-nut after hand tightened).

(4) Use the manifold tube elbows as a second wrenching flat and apply a torque of

250 – 270 lbf-in (28.246 – 30.506 N.m) to the B-nut.

NOTE: The torque value for the fuel supply tube B-nut connection at the fuel

injector supply manifold is not being revised (see Figure 6).

(5) Install Safety Cable, PN AS3510-0218C, and Safety Ferrule, PN AS3510-02F, or

Safety Wire, PN AS3214-02, to the B-nuts.

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October 10/14

PW4G-100-A73-44

REVISION NO. 1 - February 12/15 Page 9

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
5. If fuel injector(s) and associated fuel injector supply manifold(s) were replaced, do the

following:

A. Install all hardware/components that were removed to gain access to the fuel injector

supply manifold(s) and fuel injector(s).

B. Service any system disturbed components (Hydraulic Pump, IDG, and Starter) as

necessary.

C. Perform post-requisite checks/tests as specified in Reference (4), Airbus A330

Aircraft Maintenance Manual.

6. Close the thrust reverser doors as specified in Reference (4), Airbus A330 Aircraft

Maintenance Manual.

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October 10/14

PW4G-100-A73-44

REVISION NO. 1 - February 12/15 Page 10

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Part B (For Engines On-Wing) — Do an inspection and re-torque of the (24) fuel nozzle to

fuel supply manifold connection interfaces

1. Open the thrust reverser doors as specified in Reference (4), Airbus A330 Aircraft

Maintenance Manual (AMM).

2. Allow the engine to cool down to a working temperature.

3. Remove any hardware as required for access to the (24) fuel nozzles. Use the procedures

in Reference 4., Airbus A330 Aircraft Maintenance Manual (AMM).

NOTE: Pratt & Whitney trials have found it necessary to remove the Starter, Starter Heat

Shield, Integrated Drive Generator (IDG) and the IDG Heat Shield in order to gain

access to the B-nut connections. Based on individual operator experience, more

or less hardware/components may or may not require removal. See Figure 5.

4. Visually Inspect the (24) fuel nozzle to fuel supply manifold connection interfaces for fuel

leaks and soot or coke formation. See Figures 3 and 4.

5. If signs of fuel leakage, or soot or coke formation is found at any location, do the following

steps:

NOTE: Replacement of hardware may be deferred, provided the affected area is cleaned

and the B-Nut(s) is/are torqued as specified in Part B., Step 3 and Steps 6-10,

but a high power (1.4 EPR) run must be accomplished to ensure no leakage. If

any leakage is observed after the high power run, the affected hardware must

be immediately replaced as specified below. If leakage is not detected, a repeat

inspection every 15 – 20 cycles is required of the affected locations until this

Service Bulletin is completed. However, if any further leakage, soot or coke

formation is found during the repetitive inspection, the affected hardware must

be immediately replaced as specified below. Replacement of hardware must be

completed by the applicable compliance date.

A. Remove the effected fuel injector(s) and associated fuel injector supply manifold(s)

per Reference (4), AMM, Chapter/Section 73-11-15, Removal-01.

B. Install replacement fuel injector(s) per Reference (4), Airbus A330 Aircraft

Maintenance Manual, Chapter/Section 73-11-15, Installation-01, but use the following

steps:

(1) Discard the old gasket option and install a new Gasket Option, PN ST1141-40.

(2) Install a replacement Fuel Nozzle and Support Assembly, PN 51J345.

C. Install replacement fuel injector supply manifold(s) Reference (4), Airbus A330 Aircraft

Maintenance Manual, Chapter/Section 73-11-15, Installation-01, but use the following

steps:

(1) Discard the old packings and install new Packings, PN ST1946-010.

(2) Install a replacement Fuel Injector Supply Manifold, PN 50J959-01 or PN

50J958-01.

(3) Apply Engine Oil, PWA 521 (P03-001), to the threads of the fuel nozzle supply

manifold B-nuts. Include a few drops of oil to the B-nut thrust wire area (apply at

the top of the B-nut after hand tightened).

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October 10/14

PW4G-100-A73-44

REVISION NO. 1 - February 12/15 Page 11

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
(4) Use the manifold tube elbows as a second wrenching flat and apply a torque of

250 – 270 lbf-in (28.246 – 30.506 N.m) to the B-nut.

NOTE: The torque value for the fuel supply tube B-nut connection at the fuel

injector supply manifold is not being revised (see Figure 6).

(5) Install Safety Cable, PN AS3510-0218C, and Safety Ferrule, PN AS3510-02F, or

Safety Wire, PN AS3214-02, to the B-nuts.

6. For all of the remaining locations where there were no signs of fuel leakage, soot or coke

formation, loosen and re-torque the B-nuts as follows:

CAUTION: DO THE FOLLOWING STEPS TO ONE B-NUT AT A TIME ON A FUEL

SUPPLY MANIFOLD. LOOSENING MULTIPLE B-NUTS ON A SINGLE FUEL

SUPPLY MANIFOLD MAY RESULT IN THE FUEL SUPPLY MANIFOLD

MOVING OUT OF POSITION RESULTING IN MISALIGNMENT OF THE

B-NUT AND FUEL NOZZLE INTERFACE.

A. Remove the safety cable/ferrule or safety wire from the B-nut.

B. Loosen the B-nut to fully disengage threads.

C. Apply Engine Oil, PWA 521 (P03-001), to the exposed threads of the fuel nozzle.

Include a few drops of oil to the B-nut thrust wire area (apply at the top of the B-nut

after hand tightened).

D. Use the manifold tube elbows as a second wrenching flat and apply a torque of 250 –

270 lbf-in (28.246 – 30.506 N.m) to the B-nut.

NOTE: The torque value for the fuel supply tube B-nut connection at the fuel injector

supply manifold is not being revised (see Figure 6).

E. Install Safety Cable, PN AS3510-0218C, and Safety Ferrule, PN AS3510-02F, or

Safety Wire, PN AS3214-02, to the B-nut.

7. Install all hardware/components that were removed to gain access to the fuel injector

supply manifold(s) and fuel injector(s) as specified in Reference (4), Airbus A330 Aircraft

Maintenance Manual.

8. Service any system disturbed components (Hydraulic Pump, IDG, and Starter) as

necessary as specified in Reference (4), Airbus A330 Aircraft Maintenance Manual.

9. Perform post-requisite checks/tests as specified in Reference (4), Airbus A330 Aircraft

Maintenance Manual.

10. Close the thrust reverser doors as specified in Reference (4), Airbus A330 Aircraft

Maintenance Manual.

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October 10/14

PW4G-100-A73-44

REVISION NO. 1 - February 12/15 Page 12

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Part C (For Engines Off-Wing, complete engines or partially disassembled engines) Do an

inspection and re-torque of the (24) fuel nozzle to fuel supply manifold connection interfaces

NOTE: This Part is for engines that have MORE THAN zero cycles since the fuel nozzles

and fuel supply manifolds were installed.

1. Remove necessary hardware/components to gain access to all (24) fuel injector supply

manifold B-nut connections to the fuel injectors as specified in Reference (3), Engine

Manual.

2. Visually inspect the (24) fuel nozzle to fuel supply manifold connection interfaces for fuel

leaks and soot or coke formation. See Figures 3 and 4.

3. If signs of leakage, soot or coke formation is found at any location, do the following steps:

A. Remove the effected fuel injector(s) and associated fuel injector supply manifold(s)

per Reference (3), Engine Manual, Chapter/Section 71-00-73, Removal-15.

B. Install replacement fuel injector(s) per Reference (3), Engine Manual, Chapter/Section

71-00-73, Installation-15.

(1) Discard the old gasket option and install a new Gasket Option, PN ST1141-40.

(2) Install a replacement Fuel Nozzle and Support Assembly, PN 51J345.

C. Install replacement fuel injector supply manifold(s) per Reference (3), Engine Manual,

Chapter/Section 71-00-73, Installation-15, but use the following steps:

(1) Discard the old packings and install new Packings, PN ST1946-010.

(2) Install a replacement Fuel Injector Supply Manifold, PN 50J959-01 or PN

50J958-01.

(3) Apply Engine Oil, PWA 521 (P03-001), to the threads of the fuel nozzle supply

manifold B-nuts. Include a few drops of oil to the B-nut thrust wire area (apply at

the top of the B-nut after hand tightened).

(4) Use the manifold tube elbows as a second wrenching flat and apply a torque of

250 – 270 lbf-in (28.246 – 30.506 N.m) to the B-nut.

NOTE: The torque value for the fuel supply tube B-nut connection at the fuel

injector supply manifold is not being revised (see Figure 6).

(5) Install Safety Cable, PN AS3510-0218C and Safety Ferrule, PN AS3510-02F or

Safety Wire, PN AS3214-02, to the B-nut.

4. For all of the remaining locations where there were no signs of fuel leakage, soot or coke

formation, loosen and re-torque the B-nuts as follows:

CAUTION: DO THE FOLLOWING STEPS TO ONE B-NUT AT A TIME ON A FUEL

SUPPLY MANIFOLD. LOOSENING MULTIPLE B-NUTS ON A SINGLE FUEL

SUPPLY MANIFOLD MAY RESULT IN THE FUEL SUPPLY MANIFOLD

MOVING OUT OF POSITION RESULTING IN MISALIGNMENT OF THE

B-NUT AND FUEL NOZZLE INTERFACE.

A. Remove the safety cable/ferrule or safety wire from the B-nut.

B. Loosen the B-nut to fully disengage threads.

C. Apply Engine Oil, PWA 521 (P03-001), to the exposed threads of the fuel nozzle.

Include a few drops of oil to the B-nut thrust wire area (apply at the top of the B-nut

after hand tightened).

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
D. Use the manifold tube elbows as a second wrenching flat and apply a torque of 250 –

270 lbf-in (28.246 – 30.506 N.m) to the B-nut.

NOTE: The torque value for the fuel supply tube B-nut connection at the fuel injector

supply manifold is not being revised (see Figure 6).

E. Install Safety Cable, PN AS3510-0218C, and Safety Ferrule, PN AS3510-02F, or

Safety Wire, PN AS3214-02, to the B-nut.

5. Install all hardware/components that were removed to gain access to the fuel injector

supply manifold(s) and fuel injector(s) as specified in Reference (3), Engine Manual.

6. Perform post-requisite checks/tests as specified in Reference (3), Engine Manual.

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REVISION NO. 1 - February 12/15 Page 14

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Part D (For Engines In-Shop that are disassembled) Use the following steps when installing

replacement fuel nozzles and fuel supply manifolds

NOTE: This Part is for engines that will be assembled. An increased torque value at the

fuel supply manifold to fuel injector B-nut is used that has not been updated in the

Reference (3) Engine Manual at this time.

1. Apply Engine Oil, PWA 521 (P03-001), to the threads of the fuel supply manifold B-nuts.

Include a few drops of oil to the B-nut thrust wire area (apply at the top of the B-nut after

hand tightened).

2. Use the manifold tube elbows as a second wrenching flat and apply a torque of 250 – 270

lbf-in (28.246 – 30.506 N.m) to the B-nut.

NOTE: The torque value for the fuel supply tube B-nut connection at the fuel injector

supply manifold is not being revised (see Figure 6).

3. Install Safety Cable, PN AS3510-0218C and Safety Ferrule, PN AS3510-02F or Safety

Wire, PN AS3214-02, to the B-nut.

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
Part E (For Assembled Engines Off-Wing with replacement fuel nozzles and fuel supply

manifolds installed and the engine has not been run) Re-torque (24) fuel nozzle to fuel supply

manifold connection interface B-nuts.

NOTE: This Part is for assembled spare engines that have ZERO CYCLES since replacement

fuel nozzles and fuel supply manifolds were installed without incorporating the

increased torque value.

1. Remove necessary hardware/components to gain access to all (24) fuel injector supply

manifold B-nut connections to the fuel injectors as specified in Reference (3) Engine

Manual.

CAUTION: DO THE FOLLOWING STEPS TO ONE B-NUT AT A TIME ON A FUEL

SUPPLY MANIFOLD. LOOSENING MULTIPLE B-NUTS ON A SINGLE FUEL

SUPPLY MANIFOLD MAY RESULT IN THE FUEL SUPPLY MANIFOLD

MOVING OUT OF POSITION RESULTING IN MISALIGNMENT OF THE

B-NUT AND FUEL NOZZLE INTERFACE.

2. For all (24) locations, loosen and re-torque the B-nuts as follows:

A. Remove the safety cable/ferrule or safety wire from the B-nut.

B. Loosen the B-nut to fully disengage threads.

C. Apply Engine Oil, PWA 521 (P03-001), to the threads of the fuel nozzle. Include a

few drops of oil to the B-nut thrust wire area (apply at the top of the B-nut after hand

tightened).

D. Use the manifold tube elbows as a second wrenching flat and apply a torque of 250 –

270 lbf-in (28.246 – 30.506 N.m) to the B-nut.

NOTE: The torque value for the fuel supply tube B-nut connection at the fuel injector

supply manifold is not being revised (see Figure 6).

E. Install Safety Cable, PN AS3510-0218C, and Safety Ferrule, PN AS3510-02F, or

Safety Wire, PN AS3214-02, to the B-nut.

3. Install all hardware/components that were removed to gain access to the fuel injector

supply manifold(s) and fuel injector(s) as specified in Reference (3), Engine Manual.

4. Perform post-requisite checks/tests as specified in Reference (3), Engine Manual.

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REVISION NO. 1 - February 12/15 Page 16

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
LOCATION OF THE FUEL INJECTOR MANIFOLD SUPPLY TUBES

73-11-00

FIGURE 1

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REVISION NO. 1 - February 12/15 Page 17

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
LOCATION OF THE FUEL NOZZLE AND SUPPORT ASSEMBLY

73-11-00

FIGURE 2

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
PHOTO OF B-NUT SOOT/COKE FORMATION

FIGURE 3

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
PHOTO OF EXTERNAL SOOT/COKE

FIGURE 4

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REVISION NO. 1 - February 12/15 Page 20

UTC/P&W PROPRIETARY INFORMATION

Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
LOCATION OF HARDWARE THAT MAY NEED TO BE REMOVED FOR RE-TORQUE OF B-NUTS

FIGURE 5

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).
FUEL SUPPLY MANIFOLD TO FUEL NOZZLE INTERFACE

FIGURE 6

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REVISION NO. 1 - February 12/15 Page 22

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Subject to the restrictions on the cover or first page.

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 EA14KC803 JRM/JEJ

1

EC14KA063

EC14KA063A

JRM/JEJ

Number values shown in parentheses adjacent to U.S. values are International System of

units (SI) equivalents.

Reference 3, Engine Manual, Chapter/Section 71-00-73 and 72-41-00, Revision 77, dated

January 15, 2015 has incorporated the new assembly torque values related to this Service

Bulletin.

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REVISION NO. 1 - February 12/15 Page 23

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Subject to the restrictions on the cover or first page.

Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).