# Pratt & Whitney Service Bulletin PW4ENG 73-223

Copy: No revision named ("PW4ENG 73-223"), 9 pages: PDF https://openairdocs.org/files/sha256/ba/74/ba7407f72c59cbbc8322d845d4a62ab8293d33d79432bf0724e1a7d998620529; text https://openairdocs.org/service-documents/pratt-whitney/pw4eng-73-223/file/ba7407f72c59.md. Rights: © Pratt & Whitney. Filed by the FAA in regulations.gov docket FAA-2018-0924, the docket of AD 2019-06-02. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Pratt & Whitney](https://openairdocs.org/service-documents/pratt-whitney.md)
- Type: Service bulletin (Service Bulletin)
- Number: PW4ENG 73-223
- Page: https://openairdocs.org/service-documents/pratt-whitney/pw4eng-73-223

## ADs that cite it (1) (OpenAirDocs)

Newest first, with the revision each names, as OpenAirDocs read it from the AD's text.

- [AD 2019-06-02](https://openairdocs.org/ad/2019-06-02.md), effective Apr 30, 2019: No revision named

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/pratt-whitney/pw4eng-73-223/proposed.md).

## Text (9 pages)

Rights: © Pratt & Whitney. Filed by the FAA in regulations.gov docket FAA-2018-0924, the docket of AD 2019-06-02. Not covered by OpenAirDocs’ CC0 dedication. Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

SER
VICE
BULLETIN
ENGINE
FUEL
AND
CONTROL
—
FUEL
NOZZLE
AND
SUPPOR
T
ASSEMBL
Y
—
INTRODUCTION
OF
A
NEW
FUEL
NOZZLE
AND
SUPPOR
T
ASSEMBL
Y
THA
T
DOES
NOT
HA
VE
A
BRAZED
INLET
FITTING
MODEL
APPLICA
TION
PW4158(-3)
BULLETIN
ISSUE
SEQUENCE
PW4000
Series
73-223
A
T
A
NUMBER
73-13-00
UTC/P&W
PROPRIET
AR
Y
INFORMA
TION
This
document
is
the
property
of
United
T
echnologies
Corporation
—
Pratt
&
Whitney
(UTC/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
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
.
Export
Classification:
Not
subject
to
the
EAR
per
15
C.F
.R.
Chapter
1,
Part
734.3(b)(3).
Compliance
Category
7
P&W
Distribution
Code
2616
February
5/18
PW4ENG
73-223
Page
1
of
9
Published
in
United
States
of
America

### Page 2

Summary
The
purpose
of
this
Service
Bulletin
is
to
provide
a
fuel
nozzle
and
support
assembly
that
does
not
use
a
brazed
inlet
fitting
for
PW4158-3
engines
with
the
T
alon
Combustion
Chamber
Configuration.
This
new
fuel
nozzle
configuration
is
introduced
based
on
fuel
leak
experience
with
the
PW4000-100
T
alon
IIB
combustion
chamber
configuration
that
introduced
a
similar
redesign
fuel
nozzle
configuration.
NOTE
:
In
Pratt
&
Whitney
Manuals
and
Service
Bulletins,
the
terms
“Fuel
Nozzle
and
Support
Assembly”,
“Fuel
Injector
and
Support
Assembly”,
and
“Fuel
Nozzle”
are
used
interchangeably
.
Planning
Information
Ef
fectivity
Data
Engine
Models
Applicable
PW4158(-3)
Engine
Serial
Nos.
P728534
thru
P728555
Engine
Serial
Nos.
P728557
thru
P728588
Engine
Serial
Nos.
P728590
thru
P728591
Engine
Serial
Nos.
P729808
thru
P729864
*
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
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
Service
Bulletin
PW4ENG
73-223
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
Service
Bulletin
PW4ENG
73-223
Ef
fectivity
section.
This
Service
Bulletin
also
applies
to
engines
converted
to
Phase
III
(-3)
configuration
by
Service
Bulletin
No.
PW4ENG
72-572.
Concurrent
Requirements
There
are
no
concurrent
requirements.
Reason
1.
Problem:
There
have
not
been
any
fuel
nozzle
leak
events
reported
for
the
PW4158-3
engine
with
the
T
alon
Combustion
Chamber
.
The
PW4000-100
T
alon
IIB
Combustion
Chamber
Configuration
has
experienced
fuel
leaks
at
the
brazed
joint
interface
on
the
fuel
nozzle
between
the
inlet
fitting
and
the
nozzle
support
pad.
The
cracks
in
the
brazed
joint
are
attributed
to
thermal
mechanical
fatigue
due
to
high
thermal
gradients
on
engines
equipped
with
the
T
alon
IIB
Combustor
Chamber
.
The
fuel
nozzle
has
been
redesigned
to
no
longer
use
a
brazed
inlet
fitting
for
the
PW4000-100
T
alon
IIB
Combustion
Chamber
configuration
engine.
The
PW4158-3
engine
with
the
T
alon
February
5/18
PW4ENG
73-223
Page
2
UTC/P&W
PROPRIET
AR
Y
INFORMA
TION
Not
subject
to
the
EAR
per
15
C.F
.R.
Chapter
1,
Part
734.3(b)(3).

### Page 3

Combustion
Chamber
Configuration
utilizes
a
fuel
nozzle
and
support
assembly
with
a
brazed
inlet
fitting
similar
to
the
PW4000-100
engine.
2.
Cause:
Not
Applicable.
3.
Solution:
Replace
the
fuel
nozzle
with
the
redesigned
configuration.
Description
Replace
the
fuel
nozzles.
Compliance
Category
7
Do
when
the
supply
of
superseded
parts
is
fully
used.
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
A
viation
Regulations
and
are
F
AA-Approved
for
the
engine
model(s)
given.
The
aircraft
T
ype
Certificate
(TC)
holder
has
been
informed
of
this
change.
Manpower
No
more
man-hours
are
necessary
when
done
at
complete
disassembly/assembly
.
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.
PW4152,
PW4152(-3),
PW4156A,
PW4156A(-3),
PW4158,
PW4158(-3)
T
urbofan
Engines,
Illustrated
Parts
Catalog,
Part
No.
50A445.
3.
PW4152,
PW4152(-3),
PW4156A,
PW4156A(-3),
PW4158,
PW4158(-3)
T
urbofan
Engines,
Engine
Manual,
Part
No.
50A443.
4.
Service
Bulletin
No.
PW4ENG
72-572;
Engine
—
Conversion
Of
A
PW4152,
PW4156A,
PW4158
Engine
T
o
A
PW4152(-3),
PW4156A(-3),
Or
PW4158(-3)
Engine.
Issue
Sequence
72-572,
PW4000
Series.
5.
Service
Bulletin
No.
PW4ENG
73-21
1;
Engine
Fuel
And
Control
—
Nozzle
And
Support
Assembly
,
Fuel
—
Replace
With
A
New
More
Durable
Fuel
Nozzle
And
Support
Assembly
.
Issue
Sequence
73-21
1,
PW4000
Series.
NOTE
:
Reference
4
and
5
are
shown
to
help
find
non-production
configurations
that
may
incorporate
this
bulletin.
February
5/18
PW4ENG
73-223
Page
3
UTC/P&W
PROPRIET
AR
Y
INFORMA
TION
Not
subject
to
the
EAR
per
15
C.F
.R.
Chapter
1,
Part
734.3(b)(3).

### Page 4

Publications
Changed
PW4152,
PW4152(-3),
PW4156A,
PW4156A(-3),
PW4158,
PW4158(-3)
T
urbofan
Engines,
Illustrated
Parts
Catalog,
Part
No.
50A445.
73-13-00,
Figure
1
Interchangeability
Old
and
new
parts
are
directly
interchangeable,
however
to
achieve
the
full
benefit
of
this
change
it
is
recommended
that
the
change
be
incorporated
in
full
sets.
Information
in
the
Appendix
Alternate
Accomplishment
Instructions
(No)
Progression
Charts
(Y
es)
Added
Data
(Y
es)
Revision
to
T
able
of
Limits
(No)
Inspection
Procedures
(No)
February
5/18
PW4ENG
73-223
Page
4
UTC/P&W
PROPRIET
AR
Y
INFORMA
TION
Not
subject
to
the
EAR
per
15
C.F
.R.
Chapter
1,
Part
734.3(b)(3).

### Page 5

Material
Information
Material
—
Cost
and
A
vailability
1.
Part
prices
were
not
available
at
the
time
of
Service
Bulletin
publication.
Contact
Pratt
&
Whitney
Spares
Management
&
Logistics
for
firm
quotations.
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.
For
PW4158(-3)
Engines:
New
PN
Qty
Estimate
of
Unit
Price
($)
Keyword
Old
PN
Instructions
—
Disposition
51J397
24
*
NOZZLE
AND
SUPPOR
T
ASSEMBL
Y
—
FUEL
51J344
(73-13-00-1-10
C)
(2)(L)
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
(2)
The
new
part
is
a
replacement
part
only
,
and
cannot
be
obtained
by
modification
of
the
old
part.
Spare
Parts
A
vailability
(L)
The
old
part
will
be
supplied
until
the
supply
is
fully
used.
V
endor
Services
or
Special
Components/Materials
Not
Applicable.
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
T
ools
No
more
Support
Equipment
is
necessary
.
Other
Material
Information
Data
Not
Applicable.
February
5/18
PW4ENG
73-223
Page
5
UTC/P&W
PROPRIET
AR
Y
INFORMA
TION
Not
subject
to
the
EAR
per
15
C.F
.R.
Chapter
1,
Part
734.3(b)(3).

### Page 6

Accomplishment
Instructions
1.
Replace
the
24
Fuel
Nozzles,
PN
51J344,
with
PN
51J397.
See
Figure
1.
February
5/18
PW4ENG
73-223
Page
6
UTC/P&W
PROPRIET
AR
Y
INFORMA
TION
Not
subject
to
the
EAR
per
15
C.F
.R.
Chapter
1,
Part
734.3(b)(3).

### Page 7 (OCR)

Pratt & Whitney
A United Technologies Company
GASKET OPTION
(24 LOCATIONS) (REF)
BOLT
(3 LOCATIONS) PER
FUEL NOZZLE AND  51J344
SUPPORT ASSEMBLY
FUEL NOZZLE AND
(REF)  SUPPORT ASSEMBLY
REPLACE WITH
51J397 (24 LOCATIONS)
366505  1061
loçą
B526596
LOCATION OF THE FUEL NOZZLE AND SUPPORT ASSEMBLY
73-13-00
FIGURE 1
February 5/18  PW4ENG 73-223
Page 7
UTC/P&W PROPRIETARY INFORMATION
Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).

### Page 8

Appendix
Parts
Progression
to
Show
the
Changed
Part
in
Relation
to
Other
Parts
FUEL
NOZZLE
AND
SUPPOR
T
ASSEMBL
Y
CHAR
T
A
February
5/18
PW4ENG
73-223
Page
8
UTC/P&W
PROPRIET
AR
Y
INFORMA
TION
Not
subject
to
the
EAR
per
15
C.F
.R.
Chapter
1,
Part
734.3(b)(3).

### Page 9

Added
Data
Internal
Reference
Information
Revision
No.
Reference
Document
Origination
Original
EC
16KA009
ED/RCM
February
5/18
PW4ENG
73-223
Page
9
UTC/P&W
PROPRIET
AR
Y
INFORMA
TION
Not
subject
to
the
EAR
per
15
C.F
.R.
Chapter
1,
Part
734.3(b)(3).

---
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