INTRODUCTION
1.  GENERAL
A.  Purpose
This Illustrated Parts Catalog (IPC) lists and illustrates the assemblies, subassemblies and detail parts which comprise and are necessary for the support of the PT6T-3, PT6T-3B, PT6T-3BE, PT6T-3BF, PT6T-3BG Twinned Turboshaft Engines manufactured by Pratt & Whitney Canada (P&WC). This catalog is also used for identifying, requisitioning, and issuing of components. It is intended as a supplement to, not a substitute for, the associated maintenance and overhaul manuals, which shall be the final authority. The baseline standards of this publication are Engine Serial No. PC-E82001 (PT6T-3 Complete Engine), PC-E6001 (PT6T-3 Power Sections), PC-E1001 and 9501 (PT6T-3 Reduction Gearboxes), PC-E89001 (PT6T-3B Complete Engine), PC-E62001 (PT6T-3B Power Sections), PC-E2001 (PT6T-3B Reduction Gearboxes), PC-E86636 (PT6T-3BE Complete Engine), PC-E63289 (PT6T-3BE Power Sections), Engine Serial No. PC-E13001 (PT6T-3BE Reduction Gearboxes), Engine Serial No. PC-TBA (PT6T-3BF Complete Engine), PC-TBA (PT6T-3BF Reduction Gearboxes), Engine Serial No. PC-TBA (PT6T-3BG Complete Engine) and PC-TBA (PT6T-3BG Reduction Gearboxes).
B.  RSVP Customer Feedback Sheet
Please use the RSVP Customer Feedback Sheet to tell us about any errors or problems you find in this illustrated Parts Catalog.
The technical Publications Department will welcome any suggestions for modification or improvement to this catalog which will increase its usefulness.
Send completed RSVP Customer Feedback Sheets to:
Pratt & Whitney Canada Corp.
1000 Marie-victorin Blvd.
Longueuil, Quebec
Canada
J4G 1A1 
Attention: Manager, Publications Dept. (05MS1)
FAX: (450) 647-2702
Website: www.pwc.ca
Email: Publications@pwc.ca
NOTE: 1. A new on-line RSVP form is available via the P&WC website at (http://www.pwc.ca).
NOTE: 2. RSVP Customer Feedback Sheets are sent with new manuals and each subsequent revision. To get more forms, contact the Supervisor, Publications Customer Services Dept., at the above address.
C.  Specification
This Illustrated Parts Catalog agrees with the instructions given in the Air Transport Association (ATA) Specification No. 100.
D.  Engine and Accessory Identification
The complete engine is equipped with an identification nameplate which displays the manufacturer's name, engine model number, engine serial number, build specification number and other pertinent data. Engine serial numbers fall within an allocated range, beginning with PC-E82001 (PT6T-3), PC-E89001 (PT6T-3B), PC-E86636 (PT6T-3BE), PC-TBA (PT6T-3BF) or PC-TBA (PT6T-3BG).
The major accessories not originally manufactured by Pratt & Whitney Canada are furnished with their own nameplates which display the original equipment and/or identification number, P&WC equivalent identification number, equipment serial number and other applicable information.
2.  ENGINE MODEL DESIGNATION
The model designation of the engine is interpreted as follows:
PT6T Basic prefix for commercial twinned turboshaft engine.
- Dash basic to all models
3, 3B, 3BE, 3BF, 3BG Numbers are convenience designations.
3.  EFFECTIVITY AND BUILD SPECIFICATION
Effectivity Code
The Effectivity Code column, when used, indicates the applicability of parts to an engine model. A legend method is used for engines whereby a one-letter code identifies those parts to be used only under certain conditions or in specific airframe installations.
Cross reference of the codes to specific Build Specification and/or airframe installation is as follows:
Parts coded A apply to PT6T-3 engines.
Parts coded B apply to PT6T-3B engines.
Parts coded C apply to PT6T-3BE engines.
Parts coded D apply to PT6T-3BF engines.
Parts coded E apply to PT6T-3BG engines.
Build Specification
The Build Specification number (BS No.) is the number assigned to an engine model for a particular customer application (aircraft installation).
A cross-reference of the BS No. to the customer application (aircraft installation) is in the Nomenclature column as follows (Ref. Tables 1 and 2 (PT6T-3), Tables 3 and 4 (PT6T-3B), Table 5 (PT6T-3BE), Table 6 (PT6T-3BF) and Table 7 (PT6T-3BG)):
NOTE: Where the BS is not mentioned in the nomenclature of the part, the part is common to all BSs of the engine model(s) applicable to the part.
For the PT6T-3, Build Specification No. 342, 403, 420, 560 and 1052 are for the Bell (Bell 212) Engine applications.
For the PT6T-3, Build Specification No. 372, 406 and 421 are for the Sikorsky (S-58T) Engine applications.
For the PT6T-3, Build Specification No. 426, 443 and 619 are for the Bell (Bell 212) Power Section applications.
For the PT6T-3, Build Specification No. 432 and 449 are for the Bell (Bell 212) Complete RGB applications.
For the PT6T-3B, Build Specification No. 556, 1053 and 1186 are for the Agusta/Bell (AB 212/412) Engine applications.
For the PT6T-3B, Build Specification No. 835 is for the Abu Dhabi (Commercial) Engine application.
For the PT6T-3B, Build Specification No. 588, 605 and 1187 are for the Agusta/Bell (AB 212/412) Power Section applications.
For the PT6T-3B, Build Specification No. 834 is for the Abu Dhabi (Commercial) Power Section application.
For the PT6T-3B, Build Specification No. 427 and 867 are for the Agusta/Bell (AB 212/412) Complete RGB applications.
For the PT6T-3BE, Build Specification No. 770 and 883 are for the Bell (Bell 412) Engine applications.
For the PT6T-3BE, Build Specification No. 881 is for the Bell (Bell 412) Power Section application.
For the PT6T-3BE, Build Specification No. 769 and 882 are for the Bell (Bell 412) Complete RGB applications.
For the PT6T-3BF, Build Specification No. 1059 and 1062 are for the Bell (Bell 412) Engine applications.
For the PT6T-3BF, Build Specification No. 1060 and 1061 are for the Abu Dhabi (Commercial) Engine applications.
For the PT6T-3BG, Build Specification No. 1058 and 1063 are for the Bell (Bell 412) Engine applications.
4.  REVISIONS
This Illustrated Parts Catalog will be revised periodically to incorporate latest approved data. Revised material on test and illustration pages is indicated by a black line, and revised pages carry the date of the revision.
5.  SERVICE BULLETINS, SPARE PARTS BULLETINS AND PARTS DIGESTS
Part number changes introduced by Service Bulletins (SB) or Spare Parts Bulletins (SPB) are incorporated into the Illustrated Parts Catalog at subsequent revisions. References to SB and SPB (Pre and Post) are added in the nomenclature column following the description of the effected part.
NOTE:  Parts digests have been superseded by SPB's.
Spare Parts Bulletins are identified PT6T SPB (e.g. PT6T SPB No.10 ) to indicate their applicability to the PT6T Twinned Turboshaft engine family.
Service Bulletins are issued in sequence of ATA 72 identifiers and are prefixed 3026521-72- (e.g. 3026521-72-1) to indicate their applicability to the PT6T Twinned Turboshaft family. References to Service Bulletins in the text of this manual are to P&WC in-house SB numbers (e.g. SB5001). Refer to the Service Bulletin List for cross-reference to the ATA 72 identifiers.
6.  DETAILED PARTS LIST
The detailed parts list presents the engine divided into main functional groups as shown in the List of Chapter/Section/Subjects and there is a Table of Contents in front of each Detailed Parts List. These groups, as related to the overall engine, are found in Chapter 72-00-00, Figure 1, from which each is referenced to the applicable chapter/section/subject.
Each Detailed Parts List is divided into six columns, as follows:
- Figure/Item
- Part Number
- Airline Part Number
- Nomenclature
- Effectivity Code
- Units per Assembly
A.  General System of Assembly Order
The indention system used in this catalog shows the relationship of one part to another. For a given item, the indention code shows an assembly or group descriptive title starting in the extreme left position, continuing down into succeeding columns until the end detail is reached, as follows:
1 2 3 4 5 6 7
Assembly or Group Descriptive Title
. Detail Parts
. Assembly
. Attaching Parts for Assembly
. . Detail Parts for Assembly
. . Subassembly
. . Attaching Parts for Subassambly
. . . Detail Parts for Subassembly
. . . Sub-subassembly
. . . Attaching Parts for Sub-subassembly
. . . . Detail Parts for Sub-subassembly
As far as is practical, the illustrations and sequential order of the individual parts lists follow a general pattern of disassembly breakdown for the engine.
B.  Attaching Parts
Attaching parts are those parts used for the fitting together of an assembly, subassembly or a sub-subassembly to its next higher assembly. These are listed in the nomenclature column with ATTACHING PARTS as a heading followed by - - - - *- - - - indicating the end of the attaching parts. The attaching parts listed immediately following the part that they attach and precede any detail parts breakdown of the assembly. The attaching parts are indented the same as the assembly which they attach.
C.  Units per Assembly
The quantity listed in the Units per Assembly column of the detailed parts list is, in the case of each assembly, the total quantity used per engine at the location indicated; the quantity in the case of each detail part and/or subassembly indented under an assembly is the quantity used per assembly. The quantities specified, therefore, are not necessarily the total used per engine.
7.  PART NUMBERING SYSTEM
The P&WC basic part numbering system consists of a straight numerical system of seven digits within the range 3000000 through 3099999. These basic part numbers may be suffixed with letters and numbers to indicate parts available in a range of classes and/or oversize - undersize dimensions which provide for necessary selectivity during engine servicing and overhaul. In addition, a series of part numbers starting with 3100000-01 through -99 has been introduced. The complete number must be quoted on procurement documentation to ensure that the correct part is supplied. No special numbering system is employed. Numbers are assigned to assemblies, subassemblies and details, as needed.
NOTE: 1. Unless otherwise specified, the drawing revision letter at the end of a P&WC part number is not significant and it does not affect interchangeability.
NOTE: 2. Unless otherwise specified, the Supplier repair level used at the end of a P&WC part number is not significant, does not change the configuration and it does not affect interchangeability. The Supplier repair level part numbers are suffixed with two digits followed by the letter “R” and a number (i.e., - 01R1). Supplier repair level part numbers e.g. 3100000-01R1 will not be captured in the IPC.
The P&WC rework part numbers given by the Service Bulletin are included in the IPC in sequence, below the part number of a part that can be reworked. The rework part numbers are not procurable (NP), they are only obtainable by rework of the old parts. The P&WC reworked part numbers are pre-fixed with two digits followed by the letter “R”, (i.e., 01R). Rework part numbers e.g. 01R3100000-01 are identified as RWK, (Ref. Para.11). There are no item numbers for parts that are obtainable only by rework of other parts. This system shows the actual SB evolution of the engine configuration (i.e., the most recent configuration will have the latest alpha suffix to the item number).
P&WC assigns its own part numbers in order to include P&WC “standard” items. These numbers are prefixed “ST”, followed by a four-digit number in the 3000 range and a two-or three-digit dash number. In a standard range, these parts are fundamentally of the same design or shape, but differ dimensionally according to the dash number.
P&WC also assigns its own part numbers to identify items obtained from suppliers and used without alteration. The P&WC part number may be suffixed with letters corresponding to the revision level of the supplier's basic part number. The supplier part number appears in the Part Number column, and the P&WC part number appears in the Nomenclature column immediately following the supplier code.
When ***** is printed in the PART NUMBER column: refer to the NOMENCLATURE column for instructions.
An Interchangeability Control (IC) part number is used to identify and control interchangeable parts which are approved for use on the engine. In this publication, an IC number can be recognized by the word 'option' following the prime noun or key word in the Nomenclature column. Parts must be procured using the option number; supply is dependent upon the stock level, which is controlled by the supplier and not by the purchaser. Information relating to alternate parts supplied under an IC number is shown within the Nomenclature column. The actual quantity required is listed opposite the IC number.
8.  ITEM NUMBERS
The Figure/Item column shows each figure number and gives the item numbers shown on that illustration. The item numbers on illustrations are used to cross-reference a specific item to a part number in the adjoining detailed parts list. Item numbers are arranged in numerical sequence in the Figure Item column of the detailed parts list. The Detailed Parts Lists follows the sequence of the engine disassembly procedures. If there is a dash (-) in front of an item number, this item is not shown on the illustration.
When a Service Bulletin (SB) or a Spare Parts Bulletin (SPB) revises a part, a new line is added for that part which will have the same item number plus a letter (A thru Z) to show that it is a revised part.
9.  HOW TO USE THIS CATALOG
NUMERICAL INDEX
The function of the Numerical Index is to help the user to find the locations of each P&WC engine part and each accessory component in this IPC.
The Numerical Index is divided into the Alpha section and the Numerical section. The Alpha section gives part numbers that begin with a letter, and the Numeric section gives part numbers that begin with a number.
The Numerical Index gives all P&WC part numbers and all supplier part numbers (and equivalent P&WC part numbers) found in the Detailed Part Lists. The Numerical Index refers to the Chapter/Section/Subject and the figure where the part is illustrated. It also refers to the item number of that part on the illustration, together with the necessary quantity at each location.
The quantities listed in the Total Required column do not represent the actual total quantities required for each engine. Items listed as AR and REF are not taken into account when totals are computed.
The quantity given in the Total Required column is the total quantity necessary for a component or for an assembly.
To find the quantity of one part for the full engine at a given SB configuration: add the quantities given for all of the item numbers under that part number which are related to that configuration.
CHAPTER/SECTION NUMBERING SYSTEM
A three-element Chapter/Section/Subject number is given to each engine section. This number is in the bottom right corner of each page above the page number. These numbers are given per the Air Transport Association (ATA) Specification No. 100.
The first element of the number identifies the chapter. This illustrated Parts Catalog contains data applicable to Chapters 72 thru 79. The second element identifies the engine section. Refer to the list of Chapter/Section/Subjects for the different sections contained in this IPC.
HOW TO FIND A PART WHEN THE PART NUMBER IS KNOWN (Ref. Fig. 1)
Find the part in the part number column of the Numerical Index.
Note the chapter/section/subject, figure and item number for the part and refer to that location in the detailed parts list.
Find the Item number in the detailed parts list. This shows the part number, description and other pertinent information.
Locate the same item number on the corresponding illustration, which shows the location of the part on the engine.
HOW TO FIND A PART WHEN THE PART NUMBER IS NOT KNOWN (Ref. Fig. 2)
Refer to 72-00-00, Figure 1 (Engine Assembly, Complete) and find the figure which is most applicable for the location of the part.
Turn to that figure and find the part on the illustration. Note the item number and refer to the corresponding detailed parts list.
Find the same item number on the detailed parts list. This shows the part number description and other pertinent information.
GraphicGraphic
10.  CROSS-INDEX SYSTEMS
The notation, “See...”, in the Nomenclature column indicates that greater detail or additional information will be found in the referenced publication, chapter/section/subject, figure or note. Notes appear at the end of a detailed parts list.
11.  CATALOG TERMS
IN SETS
The term “in sets” is used in this catalog to identify groups of parts that may be interchanged only as a complete set. Individual parts within the groups or sets may not be interchanged; they must be used as a set.
INTERCHANGEABLE WITH
The term “interchangeable with” is used in this catalog to identify a part that may be interchanged with the part indicated, without restriction, except that when a model/installation application is indicated by an effectivity code, restriction in the Nomenclature column, or a reference to a Service Bulletin, that part can only be used in the indicated model/installation.
A series of “interchangeable with” notes that lead from one part to the next are all interchangeable within that series. The model/installation effectivity for parts in a series must be adhered to. The “interchangeable with” is allowed only within the model/installation effectivity restrictions.
NOTE: The terms “In Sets” and “Interchangeable With” have been replaced with the following since the introduction of Part Replacement Codes (PRC). They may still be found in existing catalogs.
NON-INTERCHANGEABLE WITH
The term “non-interchangeable with” is used in this catalog to identify a part that may not be interchanged with the part indicated. There may be a restriction applied to this part and the referenced Parts Digest, Spare Parts Bulletin or Service Bulletin must be consulted to establish what the restriction is.
ONE-WAY INTERCHANGEABLE (PRC 01)
The old part may be used to replace the old part only; the new part may be used to replace the old and new part.
Example: new part is functionally different from the old part to the extent that installation with the airframe is affected.
TWO-WAY INTERCHANGEABLE (PRC 02)
The old or new part can replace the old or the new part.
Example: parts can be freely interchanged.
NOT INTERCHANGEABLE (PRC 03)
The old part must be replaced with the old part; the new part must be replaced with the new part.
Example: the new part will not fit where the old part was or vice-versa, i.e. incompatible interfaces.
INTERCHANGEABLE AS A SET (PRC 06)
When replacement comprises a set consisting of a quantity of a single part number (if replacement must be the full quantity used in one model/installation).
Example: blades, gears, or other parts which must be incorporated as a set.
QUALIFIED INTERCHANGEABILITY (PRC 07)
When the above codes do not apply or when the replacement set (in explanation code 06) comprise of more than one part number
Example: When the replacement set is more than one part number, the old and the new parts are interchangeable in complete sets only.
NOTE: The above term is being replaced by the following new term throughout this catalog. The new term will appear in affected locations when the associated Figure is revised.
INTERCHANGEABLE AS IDENTIFIED WITH (PRC 07)
All the old parts must be replaced by all the new parts as an assembly.
The term "INTERCHANGEABLE AS IDENTIFIED WITH" is used in this catalog to identify a part that is interchangeable only as specified in the applicable Service Bulletin. The Service Bulletin must be consulted to establish the interchangeability condition.
NOTE: The above two terms are being replaced by the following new term throughout this catalog. The new term will appear in affected locations when the associated Figure is revised.
RESTRICTED INTERCHANGEABILITY WITH (PRC 07)
All the old parts must be replaced by all the new parts as an assembly.
The term "RESTRICTED INTERCHANGEABILITY WITH" is used in this catalog to identify a part that is interchangeable only as specified in the applicable Service Bulletin. The Service Bulletin must be consulted to establish the interchangeability condition.
DELETED
This term is used when a part is removed and no longer used as a result of SB or SPB activity.
The word “DELETED” will appear in the part number column and a “POST” reference to the SB or SPB will appear in the nomenclature column.
TRANSFERRED
For the relocation of a part to a different chapter/section/subject or figure. The nomenclature column will indicate what or where to find the part number.
N/A (Not Applicable)
This term is used when a part is removed from the IPC due to non-applicability to that particular catalog. “N/A” will appear in the part number column and the nomenclature column will be left blank.
For both “DELETED” and “N/A” a highlights page will be added to the cover sheet for IPC revisions to indicate which part numbers have been removed.
LATEST PARTS LIST NO.
This term is used to advise of the latest approved revision level of a supplier part number that does not require a P&WC part number change. Changes done by the supplier of the component, which do not affect the form, fit and function of the component, are recorded through a revision level that can be of a dash number (e.g., -1), revision letter (e.g., A) or a combination of a letter and number (e.g., L1). The latest revision level is TWO-WAY INTERCHANGEABLE with all prior revisions of the same Fig. Item Part Number.
RWK (Rework)
This term is used in the Units per Assembly column to advise that the part can only be obtained through rework. The rework number will not be assigned an item number; they will be incorporated after the "family" number (the saleable number from which they are a rework of). The nomenclature will always be followed with the term "Reworked from".
12.  ABBREVIATION
Below is a list of abbreviations used in P&WC Illustrated Parts Catalogs.
ACCESS Accessory
ACCY Accessory
AGB Accessory Gearbox
APU Auxiliary Power Unit
AR As Required
ATA Air Transport Association of America
BRG Bearing
BS Build Specification
C Celsius
CH Change
CL Class; P&WC part number suffix followed by alpha or numeric symbols to indicate various sizes of the basic part. Quantity required appears against basic part number. Classification data appears against part number in Nomenclature column.
CMM Component Maintenance Manual
CSK Countersink
CTSK Countersunk
CTWT Counterweight
DBL Double
DEG Degree
DG Degree
DIA. Diameter
DR Drilled
DRD Drilled
ECU Electronic Control Unit
EEC Engine Electronic Control
EFF Effect Model
EFC Electronic Fuel Control
F Fahrenheit
FCU Fuel Control Unit
FIG Figure
FMU Fuel Metering Unit
FXD Fixed
GG Gas Generator
GP Group
GRBX Gearbox
HD Head
HEX Hexagon
HLCPS Helical Compression
HMU Hydromechanical Unit
HP High Pressure
IC Interchangeability Control
ID Inside Diameter
IDENT Identification
IN. Inch
INSTL Installation
INTRCHG WITH Interchangeable with
L/H Left Hand
LP Low Pressure
M Minus (i.e. undersize)
MACH Machine
MAX Maximum
MIN Minimum
N/A Not Applicable
NH SENSOR High Rotor Speed Sensor
NHA Next Higher Assembly
NL SENSOR Low Rotor Speed Sensor
NO. Number
NONINTR WITH Non-interchangeable with
NP Not Procurable
NP SENSOR Propeller Speed Sensor
OD Outside Diameter
OPTL Optional
OVS Oversize
OZ Ounce
P Plus (i.e. oversize)
PD Parts Digest
PL Plate
P/N Part Number
PRC Part Replacement Code
PRCMT Procurement
PRV Pressure Regulating Valve
PS Power Section
PT Part
P&WC Pratt & Whitney Canada
QTY Quantity
RDCN Reduction
REF Reference
REQD Required
RGB Reduction Gearbox
R/H Right Hand
SB Service Bulletin
SPB Spare Parts Bulletin
STR Straight
TBA To Be Advised
TEMP Temperature
THD Thread
WT Weight
13.  CUSTOMER SUPPORT
Customer Support representatives maintain contact with operators and service activities and are available for investigation of any specific difficulty or problem. Requests for assistance and/or AOG support should be directed to:
Pratt & Whitney Canada Corp.
1000 Marie-victorin Blvd.
Longueuil, Quebec
Canada
J4G 1A1 
Attention: Customer Support
TEL: US and Canada: 1-800-268-8000
International: (IAC)-8000-268-8000
Other: 1-450-647-8000
Telex: 05-267509
FAX: 1-450-647-2888
REF: Customer Help Desk (24-hour service)
Email: customerhelpdesk@pwc.ca
Telephone or write to the manager of the Spare Parts Sales Department to get details about how to order parts. You can also get information from the customer Help Desk.
Pratt & Whitney Canada Corp.
1000 Marie-victorin Blvd.
Longueuil, Quebec
Canada
J4G 1A1 
Attention: Spare Parts Sales Department
14.  SUPPLIERS AND SUPPLIER SERVICES
The names of any companies provided in this publication as a possible source for required services or supplies are furnished for information purposes only.
Pratt & Whitney Canada does not endorse the work performed or supplies procured from these companies. Further, Pratt & Whitney Canada does not accept responsibility, to any degree, for the selection of such companies for such work performed or supplies procured.
15.  SUPPLIER CODES
Supplier-approved codes (Ref. Table 8) appear in parentheses in the Nomenclature column, in the detailed parts list. Supplier codes are five numbers if the supplier is in North America, or four numbers prefixed by a letter to the country of the supplier. The supplier codes are listed below in alpha-numerical sequence with the corresponding supplier names and addresses.
16.  APPLICABLE DOCUMENTATION
Table 9 shows the Component Maintenance Manual (CMM) or the Abbreviated Component Maintenance Manual (ACMM) for the engine accessories included in this IPC. The table gives the component name, the supplier code (Ref. Table 8), the supplier part number, the P&WC part number, the ATA number of the CMM or ACMM and the part number of the CMM or ACMM (if applicable).
17.  OPTIONS
Table 10 gives data about the procurable parts that are used for different nut options. The option (IC) part numbers are given in alpha-numerical sequence with the detail part numbers indented below the Name/Detail Part Number column.
You must use the option part numbers to order parts and the supplier will supply the detail part which is available in his stock.
Table 10 gives nut options only. All the other parts that have options are given in the Detailed Parts List. The option part number, followed by (IC), is shown after the item number and the name tells you that it is an option which consists of the detail part numbers that follow.
18.  PART SUBSTITUTION LIST
A.  Purpose
The Part Substitution List (PSL) (Ref. Table 11) is provided to facilitate the identification of optional parts that can be used in place of the P&WC required part.
B.  Use Of List
The required part number is listed in the left hand column of the PSL. The acceptable substitute part number(s) are listed in the right hand column. The substitute part number(s) are listed from top to bottom in diminishing order of preferred use.
When Interchangeability Control (IC) numbers are listed for nuts as acceptable substitute part numbers refer to Table 10 for the OPTION (IC) part numbers.
C.  Size Selection
An asterisk " * " indicates that the required part number and its acceptable substitute part number(s) must have the same dash number.
D.  Part Substitution List