ENGINE - Service Life Limits for Rotating Parts

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The information contained in this document is GE proprietary information and is disclosed in confidence. It is the property of GE and shall not be used, disclosed to others or reproduced without

the express written consent of GE, including, but without limitation, it is not to be used in the creation, manufacture, development, or derivation of any repairs, modifications, spare parts, designs, or

configuration changes or to obtain FAA or any other government or regulatory approval to do so. If

consent is given for reproduction in whole or in part, this notice and the notice set forth on each page

of this document shall appear in any such reproduction in whole or in part.

This technical data is considered EAR controlled pursuant to 15 CFR Parts 730-774 respectively.

Transfer of this data by any means to a Non-US Person, whether in the United States or abroad,

without the proper U.S. Government authorization (e.g., License, exemption, NLR, etc.), is strictly

prohibited.

GEAE authorizes the Federal Aviation Administration to incorporate this document by reference in

an Airworthiness Directive.

Copyright (2015) General Electric Company, U.S.A.

July 09, 1979 CT58 S/B 72-A0162

Revision 16, January 07, 2015 PAGE 1 of 27
ENGINE - Service Life Limits for Rotating Parts

TRANSMITTAL INFORMATION

REVISION 16 TO ALERT SERVICE BULLETIN 72-A0162

Revision 16 is issued to update paragraphs 1., PLANNING INFORMATION, 3., ACCOMPLISHMENT

INSTRUCTIONS, and 4., APPENDIX A.

Revision 15 was dated January 09, 2014. Revision 14 was dated April 29, 2013. Revision 13

was dated June 13, 2012. Revision 12 was dated April 18, 2008. Revision 11 was dated March

01, 2005. Revision 10 was dated December 11, 2003. Revision 9 was dated October 06, 1998.

Revision 8 was dated June 16, 1997. Revision 7 was dated April 25, 1997. Revision 6 was dated

June 19, 1995. Revision 5 was dated May 12, 1994. Revision 4 was dated August 31, 1993.

Revision 3 was dated May 19, 1993. Revision 2 was May 22, 1985. Revision 1 was dated June 27,

1980. The original was dated July 09, 1979. Revision bars in the left margin identify changes.

1. PLANNING INFORMATION

A. Effectivity

This Alert Service Bulletin is applicable to the following engines:

CT58-100-2 CT58-110-1

CT58-110-2

CT58-140-1

CT58-140-2

B. Concurrent Requirements

None.

C. Description

Operators are required to maintain the service records of engine life-limited

rotating parts. Service hours and cycles (calculated according to paragraph 3.,

ACCOMPLISHMENT INSTRUCTIONS), must be compared to the limits in Tables I,

II, III, IV of this Alert Service Bulletin. Parts must be removed from service before

the life limits are exceeded.

NOTE: Tables I, II, III, and IV in this Alert Service Bulletin supersedes and replaces

the Airworthiness Limitations Section (ALS) of the Overhaul Manuals

SEI-102 and SEI-183 contained in section 72-00. Future changes to the

limits will continue to be made by revision of this Alert Service Bulletin.

For a copy of the Overhaul Manual SEI-102, contact CT58 Program

Manager. Refer to the address listed at the end of paragraph 3.B.(2) of

ACCOMPLISHMENT INSTRUCTIONS of this Alert Service Bulletin.

(1) Definitions:

(a) Cycle: defined as any engine operating sequence involving an engine

start, one acceleration to takeoff power, and shutdown.

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

(b) Non-Repetitive Heavy-Lift (Non-RHL) operations: defined as an engine

start, acceleration to takeoff power, an average of less than two

additional landings or lift-carry-drop sequences per hour, and shutdown.

(c) Utility operations: defined as an engine start, acceleration to takeoff

power, an average of two to ten additional landings or lift-carry-drop

sequences per hour, and shutdown.

(d) Repetitive Heavy-Lift (RHL) operations: defined as an engine start,

acceleration to takeoff power, an average of more than ten additional

landings or lift-carry-drop sequences per hour, and shutdown.

(e) CSN: Cycles Since New

(f) TSN: Time Since New

(g) Shop Visit: defined as the induction of an engine into a shop or facility

for maintenance in accordance with Overhaul Manual SEI-183.

D. Compliance

Category 1

GE recommends you do this Alert Service Bulletin to ensure safe operation of

CT58 engines in service.

Upon receipt of this bulletin, refer to Tables I, II, III, IV for life limits on all rotating

parts.

(1) The change of the Multiplying Factor for Utility and RHL Operations from 6.0

to 3.0 and reducing cycle life limit from 26,000 to 12,800 cycles, affecting

compressor spools P/N 5124T94G02, P/N 6010T57G04, P/N 6010T57G07,

and P/N 6010T57G08 can be complied with by utilizing the Field Management

Plan described in paragraph 4.A. of APPENDIX A of this Alert Service Bulletin,

in order to minimize the operational impact on their fleets.

(2) Utility operators can utilize the Field Management Plan described in paragraph

4.B. of APPENDIX A of this Alert Service Bulletin, in order to minimize the

operational impact on their fleets.

E. Reason

(1) Objective:

This Alert Service Bulletin provides service life limits for rotating parts in all

operations and a method of counting cycles of life-limited parts for RHL and

Utility operations.

(2) Condition:

Engines primarily engaged in RHL or Utility operations have experienced

premature, low-cycle fatigue damage to some parts.

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

(3) Cause:

The conventional basis for determining the number of cycles accumulated on

rotating parts has been defined as a start, accelerate to takeoff power, and

shutdown in a specific time frame. The use and applications of CT58 powered

helicopters in Non-RHL operations have evolved to a much wider variety of

operations than originally taken into account.

(4) Improvement:

Evaluation of operator input has led to an update of the operational profile

for Non-RHL operations to reflect the current operations of the Non-RHL

fleet. This revision of the Alert Service Bulletin has also been updated with

clarification of conversion factors for Table IV and examples of its use.

(5) Substantiation:

An analysis of the usage and inspection data of compressor spool parts used

in Non-RHL operations has shown that usage exceeds analytical models. A

risk assessment was conducted using a validated life approach for active

compressor spools with a conservative operational profile as defined during

the operator survey. The risk assessment indicated a need to reduce the cycle

life limit for Non-RHL operators. The updated limits in Table I and paragraph

4.A. of APPENDIX A must be applied in accordance with paragraph 1.D.,

Compliance.

F. Approval

This Alert Service Bulletin has been reviewed by the FAA and the repair(s) and

modification(s) herein comply with the applicable Federal Aviation Regulations

and are FAA APPROVED for installation in the model(s) listed in this Alert Service

Bulletin.

Revision 16 of this Alert Service Bulletin is approved by the Manager, Engine

Certification Office, ANE-140, by letter dated December 30, 2014, as an Alternative

Method of Compliance (AMOC) to Airworthiness Directives (AD) 2001-18-06 and

2008-22-16.

G. Manpower

No additional man-hours are required when compliance with this Alert Service

Bulletin is performed during normal overhaul.

H. Weight and Balance

Weight and balance are not changed.

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

I. References (Use the latest version of any document)

Airworthiness Directive (AD) 2001-18-06

Airworthiness Directive (AD) 2008-22-16

SEI-102, CT58-100/-110 Overhaul Manual

SEI-183, CT58-140 Overhaul Manual

J. Publications Affected

Not applicable.

K. Previous Modification

Service Bulletin Number Service Bulletin Title

CT58 S/B 72-0078

(CEB-136)

Rework of Stage 2 Compressor Rotor Disk.

CT58 S/B 72-0084

(CEB-147)

Compressor Rotor Spool Rework (Life Limit Extension).

CT58 S/B 72-A0124

(CEB-204)

Reduction of Life Limits on Stage 2 Compressor Rotor Disk

Shaft.

CT58 S/B 72-A0125

(CEB-205)

Reduction of Life Limits for Stage 1 and Stage 2 Turbine

Wheels and Introduction of New Stage 1 and Stage 2

Turbine Wheels.

CT58 S/B 72-A0126

(CEB-206)

Inspection of Stage 1 and Stage 2 Turbine Wheels.

CT58 S/B 72-A0132

(CEB-216)

Reduction of Life Limits on Stage 1 Disk, Front Disk Shaft,

Rear Shaft, and Rear Seal of the Compressor Rotor.

CT58 S/B 72-A0146

(CEB-240)

Reduction of Service Life Limits of Compressor Rear Shaft

for External Lift Operators Only.

CT58 S/B 72-A0159

(CEB-255)

Inspection of Stage 1 Turbine Wheels.

CT58 S/B 72-A0173

(CEB-275)

Identification and Inspection of Suspect Gas Generator

Turbine Rotor Assembly Parts and Power Turbine Wheels

that may have been Inadvertently Shotpeened.

L. Interchangeability

Not applicable.

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

2. MATERIAL INFORMATION

A. Material - Price and Availability

(1) Parts necessary to do this Alert Service Bulletin:

If serviceable spare parts with serviceable life remaining are not available for

replacement, the operator may purchase new parts from GE Aircraft Engines

or authorized distributor. Part numbers and names are shown in Tables I,

II, III, and IV.

(2) Consumables:

None.

B. Industry Support Information

Not applicable.

C. Configuration Chart

Not applicable.

D. Parts Disposition

Terminate replaced parts.

E. Tooling - Price and Availability

No special support equipment beyond that normally used during overhaul is

required for compliance with this Alert Service Bulletin.

3. ACCOMPLISHMENT INSTRUCTIONS

A. Perform the following on all installed and spare rotating parts listed in Tables I,

II, and III:

(1) Determine component part number and its total time (in hours) and cycles for

installed and spare parts as follows:

(a) For engines that have not been involved in RHL or Utility operations,

compare total hours and accumulated cycles to the limits for that part

number listed in Tables I, II, and III. Then, remove parts that exceed total

hours or cycle limits from service.

(b) For engines that have been involved in RHL or Utility operations,

determine calculated total cycles for each part in Tables I, II, and III.

Then, remove parts that exceed total hours or cycle limits from service

as follows:

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

1 Perform calculations with Multiplying Factor for Utility and RHL

Operations for Tables I, II, and III as follows:

a If a part has been in RHL or Utility operations (paragraph 1.C.(1)

of Description), multiply the total hours in RHL or Utility operation

by the Multiplying Factor for Utility and RHL Operations (found

in Tables I, II, and III) for that part. The resulting product is the

cycles for that part in RHL or Utility operation:

FORMULA FOR DETERMINING CALCULATED CYCLES IN RHL OPERATIONS

CALCULATED

CYCLES IN RHL

OPERATIONS

= HOURS FLOWN IN

RHL OPERATIONS X

MULTIPLYING FACTOR

FOR

UTILITY AND RHL

OPERATIONS

FORMULA FOR DETERMINING CALCULATED CYCLES IN UTILITY OPERATIONS

CALCULATED

CYCLES IN UTILITY

OPERATIONS

= HOURS FLOWN IN

UTILITY OPERATIONS X

MULTIPLYING FACTOR

FOR

UTILITY AND RHL

OPERATIONS

b Sum the cycles calculated in the above paragraph as well as

those accumulated during Non-RHL operations. The resulting

sum is the calculated total cycles:

FORMULA FOR DETERMINING CALCULATED TOTAL CYCLES

CALCULATED

TOTAL CYCLES =

CALCULATED

CYCLES

IN UTILITY

OPERATIONS

+

CALCULATED

CYCLES IN RHL

OPERATIONS +

CYCLES

ACCUMULATED

IN NON-RHL

OPERATIONS

2 Compare calculated total cycles to the cycle limits for that part

(found in Tables I, II, or III). If the part calculated total cycles exceeds

its cycle limit, remove the part from service.

(2) Examples for determining expended life of rotating parts:

(a) Stage 1 compressor disk P/N 5001T20P01 with no history of RHL or

Utility operation and 3,000 hours and 2,500 accumulated cycles in

Non-RHL service:

1 Part can be evaluated based solely on the accumulated cycles.

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ENGINE - Service Life Limits for Rotating Parts

2 Disposition:

Continue in service and apply a Multiplying Factor for Utility and

RHL Operations of 2.4 when determining cycle life during RHL or

Utility service until 4,000 hours or 9,900 cycles, whichever occurs

first (Table I).

(b) Stage 1 compressor disk P/N 5001T20P01 with 2,000 hours in RHL

operations and 1,000 hours and 800 accumulated cycles in Non-RHL

service:

1 Calculated total cycles result is determined as follows:

a Calculated Cycles in RHL Operations = 2,000 (RHL hours) X

2.4 (Multiplying Factor for Utility and RHL Operations) (Refer to

Table I) = 4,800 Calculated Cycles in RHL Operations.

b Calculated Total Cycles = 800 (accumulated cycles) + 4,800

(Calculated Cycles in RHL Operations) = 5,600 Calculated Total

Cycles.

2 Disposition:

Continue in service and apply a Multiplying Factor for Utility and

RHL Operations of 2.4 when determining cycle life during RHL or

Utility service. Remove the stage 1 compressor disk from service

at, or prior to reaching a life limit of 4,000 hours or 9,900 cycles,

whichever occurs first.

(c) Compressor spool P/N 6010T57G04 with 2,000 hours in RHL service

and 2,000 hours and 2,000 accumulated cycles in Non-RHL service:

1 Calculated Total Cycles is determined as follows:

a Calculated cycles in RHL Operations = 2,000 (RHL hours) X

3.0 (Multiplying Factor for Utility and RHL Operations) = 6,000

Calculated Cycles in RHL Operations.

b Calculated Total Cycles = 2,000 (accumulated cycles) + 6,000

(Calculated Cycles in RHL Operations) = 8,000 Calculated Total

Cycles.

2 Disposition:

Continue in service and apply a Multiplying Factor for Utility and

RHL Operations of 3.0 when determining calculated total cycles

during RHL or Utility service. Remove the compressor spool from

service at, or prior to reaching a life limit of 10,000 hours or 12,800

cycles, whichever occurs first.

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

B. Perform the following on all installed and spare stage 1 and stage 2 turbine wheels

listed in Table IV:

(1) Determine the component part number and its total time in hours for each type

of operation (Non-RHL, Utility, RHL) on installed and spare parts and then

convert to the selected operation to determine the total equivalent hours:

(a) Perform Calculations for Turbine Wheel Conversion Factor for Table IV

as follows:

1 If a part has been in one type of operation, compare accumulated

hours in that operation to the hourly life limit in Table IV. Remove

parts from service that exceed life limits.

2 If a part has been in multiple types of operation, select a single

operation type for the part. Any one of the three operations can be

selected as there is no difference in impact on the life consumption.

Use the Turbine Wheel Conversion Factor (found in Table IV),

convert the hours of each operation type to the selected operation

type. Sum all the converted hours to obtain the total hours of the

selected operation.

3 Divide RHL and Utility converted hours by five to obtain the cycles

and Non-RHL converted hours by two to obtain the cycles.

(b) Compare total hours to the operational life limits for the part number in

Table IV. Remove parts from service that exceed life limits.

(2) Examples for determining expended life for stages 1 and 2 turbine wheels:

(a) Stage 1 turbine wheel P/N 4002T17P06 with 300 hours RHL and 500

hours Non-RHL:

1 If RHL is selected, sample calculations for the hours and cycles

for RHL:

a Convert Non-RHL to RHL (Turbine Wheel Conversion Factor

= 0.46):

0.46 x 500 = 230 hours

Total converted hours = 230 + 500 = 730 hours

b Converted cycles = 730/5 = 132 cycles

2 If Utility is selected, sample calculations for hours and cycles for

Utility operation:

a Convert RHL to Utility (Turbine Wheel Conversion Factor = 1.07):

1.07 x 300 = 321 hours

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

b Convert Non-RHL to Utility (Turbine Wheel Conversion Factor

= 0.49):

0.49 x 500 = 245 hours

Total Converted Hours = 321 + 245 = 566 hours

c Converted cycles = 566/5 = 112 cycles

3 If Non-RHL is selected, sample calculations for hours and cycles for

Non-RHL:

a Convert RHL to Non-RHL (Turbine Wheel Conversion Factor

= 2.17):

2.17 x 300 = 651 hours

Total converted hours = 651 + 500 = 1,151 hours

b Converted cycles = 1,151/2 = 576 cycles

(b) Stage 2 turbine wheel P/N 4002T96P06 with 700 hours Utility and 400

hours RHL:

1 Hours and cycles for RHL:

a Convert Utility to RHL (Turbine Wheel Conversion Factor = 0.64):

0.64 x 700 = 448 hours

Total Converted hours = 448 + 400 = 848 hours

b Converted cycles = 848/5 = 170 cycles

2 Hours and cycles for Utility:

a Convert RHL to Utility (Turbine Wheel Conversion Factor = 1.57):

1.57 x 400 = 628 hours

b Total Converted Hours:

628 + 700 = 1,328 hours

c Converted cycles = 1,328/5 = 625 cycles

3 Hours and cycles for Non-RHL:

a Convert Utility to Non-RHL (Turbine Wheel Conversion Factor

= 1.52):

1.52 x 700 = 1,064 hours

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ENGINE - Service Life Limits for Rotating Parts

b Convert RHL to Non-RHL (Turbine Wheel Conversion Factor

= 2.38):

2.38 x 400 = 952 hours

c Total Converted Hours:

1,064 + 952 = 2,016 hours

d Converted cycles = 2,016/2 = 1,008 cycles

NOTE: Operators are encouraged to direct any questions concerning the

need to apply Multiplying Factor for Utility and RHL Operations or

use of Turbine Wheel Conversion Factor to:

CT58 Program Manager

GE Aviation

1000 Western Avenue

Lynn, MA 01910

U.S.A.

C. This Alert Service Bulletin supersedes the following Service Bulletins:

Service Bulletin Number Service Bulletin Title

CT58 S/B 72-A0124

(CEB-204)

Reduction of Life Limits on Stage 2 Compressor Rotor Disk

Shaft.

CT58 S/B 72-A0125

(CEB-205)

Reduction of Life Limits for Stage 1 and Stage 2 Turbine

Wheels and Introduction of New Stage 1 and Stage 2 Turbine

Wheels.

CT58 S/B 72-A0132

(CEB-216)

Reduction of Life Limits on Stage 1 Disk, Front Disk Shaft,

Rear Shaft, and Rear Seal of the Compressor Rotor.

CT58 S/B 72-A0146

(CEB-240)

Reduction of Service Life Limits of Compressor Rear Shaft for

External Lift Operators Only.

D. Compressor Rotor Components (Figure 2)

Table I specifies the life limits for the compressor rotor components that are life

limited.

TABLE I - COMPRESSOR ROTOR COMPONENTS - LIFE LIMITS

Part Name and Part Number

Figure 2

Index No.

Life Limits

Hours Cycles

Multiplying Factor

for Repetitive

Heavy-Lift and Utility

Operations - Hours to Cycles

Stage 1 Disk 1

3920T11P01 4,000 9,900 2.4

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

TABLE I - COMPRESSOR ROTOR COMPONENTS - LIFE LIMITS

Part Name and Part Number

Figure 2

Index No.

Life Limits

Hours Cycles

Multiplying Factor

for Repetitive

Heavy-Lift and Utility

Operations -

Hours to Cycles

3920T11P02 4,000 9,900 2.4

37D400032P101 1,000 2,000 2.4

37D400211P101 1,000 2,000 2.4

37D400218P101 4,000 9,900 2.4

37D400218P102 4,000 9,900 2.4

37D400359P101 4,000 9,900 2.4

37D400359P102 4,000 9,900 2.4

*5001T20P01 4,000 9,900 2.4

5001T20P02 4,000 9,900 2.4

5013T06P01 4,000 9,900 2.4

Front Disk Shaft 2

37E500153P101 2,500 6,000 1.6

37E500213P101 2,500 6,000 1.6

37E500153P101M 2,500 6,000 1.6

**37E500213P103

See S/B 72-0078 (CEB-136)

2,500 6,000 1.6

5005T34P01 6,100 8,500 1.6

*5005T34P03 6,100 8,500 1.6

**5008T79P01 3,000 6,000 1.6

**5008T79P02 6,100 8,500 1.6

595E919P101 1,000 2,700 1.6

Spool 3

102R656P010 4,000 8,000 6.0

102R656P010CEB-147 # 10,000 20,000 6.0

37R600015P105 4,000 8,000 6.0

**37R600108G001 4,000 8,000 6.0

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

TABLE I - COMPRESSOR ROTOR COMPONENTS - LIFE LIMITS

Part Name and Part Number

Figure 2

Index No.

Life Limits

Hours Cycles

Multiplying Factor

for Repetitive

Heavy-Lift and Utility

Operations -

Hours to Cycles

**37R600108G001CEB-147 # 10,000 20,000 6.0

**37R600108G002 4,000 8,000 6.0

**37R600108G002CEB-147 # 10,000 20,000 6.0

**37R600152G001 4,000 8,000 6.0

**37R600152G001CEB-147 # 10,000 26,000 6.0

*37R600152G002 4,000 8,000 6.0

*37R600152G002CEB-147 # 10,000 26,000 6.0

4014T18P02 4,000 8,000 6.0

**4014T18G01 4,000 8,000 6.0

4014T18P03 4,000 8,000 6.0

4014T18P02CEB-147 10,000 20,000 6.0

*5124T94G02 10,000 12,800 3.0

Refer to paragraph

1.D., Compliance.

5920T13P03 # 10,000 20,000 6.0

5920T13P12 10,000 20,000 6.0

5920T13P13 10,000 20,000 6.0

**5920T13P23 10,000 26,000 6.0

5920T13P25 10,000 26,000 6.0

*5920T13P26 10,000 26,000 6.0

*5920T13P28 10,000 26,000 6.0

5920T13P33 10,000 20,000 6.0

5920T13P34 10,000 20,000 6.0

**5920T13P35 10,000 20,000 6.0

**5920T13P36 10,000 20,000 6.0

**5920T13P41 # 10,000 26,000 6.0

*5920T13P42 # 10,000 26,000 6.0

**5920T13P43 # 10,000 20,000 6.0

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

TABLE I - COMPRESSOR ROTOR COMPONENTS - LIFE LIMITS

Part Name and Part Number

Figure 2

Index No.

Life Limits

Hours Cycles

Multiplying Factor

for Repetitive

Heavy-Lift and Utility

Operations -

Hours to Cycles

**5920T13P44 # 10,000 20,000 6.0

*5920T82G07 10,000 26,000 6.0

Refer to paragraph

1.D., Compliance.

6002T75G01 4,000 8,000 6.0

6002T75G01CEB-147 # 10,000 20,000 6.0

6006T44G01 4,000 8,000 6.0

6010T57G01 4,000 8,000 6.0

6010T57G01CEB-147 10,000 26,000 6.0

*6010T57G02 4,000 8,000 6.0

*6010T57G02CEB-147 10,000 26,000 6.0

6010T57G03 10,000 26,000 6.0

*6010T57G04 10,000 12,800 3.0

Refer to paragraph

1.D., Compliance.

6010T57G05 4,000 8,000 6.0

6010T57G05CEB-147 10,000 26,000 6.0

*6010T57G06 4,000 8,000 6.0

*6010T57G06CEB-147 10,000 26,000 6.0

6010T57G07 10,000 12,800 3.0

Refer to paragraph

1.D., Compliance.

*6010T57G08 10,000 12,800 3.0

Refer to paragraph

1.D., Compliance.

Rear Shaft 4

4000T29P01 6,100 9,600 3.2

*4000T29P03 6,100 9,600 3.2

4004T42P01 7,500 15,000 3.2

**4010T54P01 6,100 9,600 3.2

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ENGINE - Service Life Limits for Rotating Parts

TABLE I - COMPRESSOR ROTOR COMPONENTS - LIFE LIMITS

Part Name and Part Number

Figure 2

Index No.

Life Limits

Hours Cycles

Multiplying Factor

for Repetitive

Heavy-Lift and Utility

Operations -

Hours to Cycles

*5013T86P03 6,100 9,600 3.2

*5016T95P01 9,000 9,600 3.2

*5016T95P04 9,000 9,600 3.2

573D357P001 7,500 15,000 3.2

573D384P003 6,100 9,600 3.2

*5016T95P06 9,000 16,500 3.2

Rear Seal 5

37C300095P101 7,500 15,000 3.2

37C300095P102 7,500 15,000 3.2

37D400061P101 6,100 9,600 3.2

*37D400061P102 6,100 9,600 3.2

*4017T37P02 6,500 11,500 3.2

NOTES:

* Indicates part number is applicable to both CT58-140-1/2 and CT58-140-A/L models.

** Indicates part number is applicable to only CT58-140-A/L models converted from CT58-110-1

or CT58-110-2 models.

# Indicates compressor spool needs to include locking blade anti-rotation slot rework per CID

5362 to obtain extended life.

E. Turbine Rotor Components (Figure 3)

Table II specifies the life limits for the turbine rotor components that are life limited.

See Table IV for limits on stage 1 (P/N 4002T17P02 TF3 and P/N 4002T17P06) and

stage 2 (P/N 4002T96P02 TF3 and P/N 4002T96P06) turbine wheels.

TABLE II - TURBINE ROTOR COMPONENTS - LIFE LIMITS

Part Name and Part Number

Figure 3

Index No.

Life Limits

Hours Cycles

Multiplying Factor

for Repetitive

Heavy-Lift and Utility

Operations -

Hours to Cycles

Front Shaft 6

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

TABLE II - TURBINE ROTOR COMPONENTS - LIFE LIMITS

Part Name and Part Number

Figure 3

Index No. Life LimitsHours Cycles

Multiplying Factor

for Repetitive

Heavy-Lift and Utility

Operations - Hours to Cycles

*5003T35P01 10,000 40,000 4.0

573D358P002 10,000 40,000 4.0

*5126T00P01 10,000 40,000 4.0

Stage 1 Turbine Wheel 7

Refer to S/B 72-A0126 (CEB-206), Rev. 3, for stage 1 turbine wheel life limits and disposition of

turbine wheels.

278D987P002 S/B

72-A0126

Out of Service

**3018T97P02 S/B

72-A0126

Out of Service

3018T97P03 S/B

72-A0126

Out of Service

3018T97P04 S/B

72-A0126

Out of Service

37D400010P101 S/B

72-A0126

Out of Service

**37D400227P101 S/B

72-A0126

Out of Service

**37D400307P101 S/B

72-A0126

Out of Service

37D400498P101 S/B

72-A0126

Out of Service

*4002T17P01 S/B

72-A0126

--

*4002T17P02 S/B

72-A0126

--

*4002T17P04 S/B

72-A0126

--

Coupling Shaft 8

278D987P002 10,000 40,000 1.5

*4001T26P01 8,100 11,500 1.5

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

TABLE II - TURBINE ROTOR COMPONENTS - LIFE LIMITS

Part Name and Part Number

Figure 3

Index No. Life LimitsHours Cycles

Multiplying Factor

for Repetitive

Heavy-Lift and Utility

Operations - Hours to Cycles

*5126T23P01 8,100 11,500 1.5

Stage 2 Turbine Wheel 9

Refer to S/B 72-A0126 (CEB-206), Rev. 3, for turbine wheel life limits and disposition of turbine

wheels.

278D979P002 S/B

72-A0126

Out of Service

**3018T98P01 S/B

72-A0126

Out of Service

3018T98P02 S/B

72-A0126

Out of Service

3018T98P03 S/B

72-A0126

Out of Service

3018T98P04 S/B

72-A0126

Out of Service

**37D400004P102 S/B

72-A0126

Out of Service

**37D400228P102 S/B

72-A0126

Out of Service

37D400499P101 S/B

72-A0126

Out of Service

*4002T96P01 S/B

72-A0126

--

*4002T96P02 S/B

72-A0126

--

*4002T96P04 S/B

72-A0126

--

Rear Shaft 10

37D400244P101 10,000 40,000 4.0

*4005T29P01 10,000 40,000 4.0

*5124T95P01 10,000 40,000 4.0

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

TABLE II - TURBINE ROTOR COMPONENTS - LIFE LIMITS

Part Name and Part Number

Figure 3

Index No. Life LimitsHours Cycles

Multiplying Factor

for Repetitive

Heavy-Lift and Utility

Operations - Hours to Cycles

Shaft Bolt 11

*4005T21P01 10,000 40,000 4.0

573D359P002 10,000 40,000 4.0

Cooling Plates

*37C300055P101 12 4,000 13,000 3.2

*5124T96P01 12 4,000 13,000 3.2

*3002T25P01 13 4,000 13,000 3.2

*5124T97P01 13 4,000 13,000 3.2

645C334P002 13 4,000 13,000 3.2

*3000T88P02 14 4,000 13,000 3.2

*5124T98P01 14 4,000 13,000 3.2

645C332P002 14 4,000 13,000 3.2

*3002T27P01 15 4,000 13,000 3.2

*5124T99P01 15 4,000 13,000 3.2

645C336P002 15 4,000 13,000 3.2

NOTES:

* Indicates part number is applicable to both CT58-140-1/2 and CT58-140-A/L models.

** Indicates part number is applicable to only CT58-140-A/L models converted from the

CT58-110-1 or CT58-110-2 models.

"Out of Service" is defined as must be retired within 400 hours or by August 1, 1994, whichever

comes first.

F. Power Turbine Rotor Components (Figure 4)

Table III specifies the life limits for the power turbine rotor components that are

life limited.

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

TABLE III - POWER TURBINE ROTOR COMPONENTS - LIFE LIMITS

Part Name and Part Number

Figure 4

Index No.

Life Limits

Hours Cycles

Multiplying Factor

for Repetitive

Heavy-Lift and Utility

Operations - Hours to Cycles

Wheel and Shaft 16

37D400151P101 8,100 15,000 2.1

37D400151P102 8,100 15,000 2.1

**37D400229P103 8,100 15,000 2.1

4004T39P01 4,000 8,000 2.1

*5002T30P01 8,100 15,100 2.1

**5003T57P01 8,100 15,100 2.1

573D270P001 4,000 8,000 2.1

573D270P002 4,000 8,000 2.1

NOTES:

* Indicates part number is applicable to both the CT58-140-1/2 and CT58-140-A/L models.

** Indicates part number is applicable to only CT58-140-A/L models converted from the

CT58-110-1 or CT58-110-2 models.

G. Stage 1 and Stage 2 Turbine Wheels (Figure 3, items 7 and 9)

Table IV specifies the life limits for the stage 1 (P/N 4002T17P02 TF3 and P/N

4002T17P06) and stage 2 (P/N 4002T96P02 TF3 and P/N 4002T96P06) turbine

wheels.

TABLE IV - STAGE 1 AND STAGE 2 TURBINE WHEELS - LIFE LIMITS

Turbine Wheel Conversion Factor (Hours to Hours)

Part Name/

Part Number

Non-RHL

to

Utility

Non-RHL

to

RHL

Utility

to

RHL

Utility

to

Non-RHL

RHL

to

Non-RHL

RHL

to

Utility

Stage 1 Wheel

4002T17P02 TF3

OR

4002T17P06

0.49 0.46 0.94 2.03 2.17 1.07

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

TABLE IV - STAGE 1 AND STAGE 2 TURBINE WHEELS - LIFE LIMITS

Stage 2 Wheel

4002T96P02 TF3

OR

4002T96P06

0.66 0.42 0.64 1.52 2.38 1.57

Conversion of Hours to Cycles

Part Name/

Part Number Non-RHL Utility RHL

Stage 1 Wheel

4002T17P02 TF3

OR

4002T17P06

To convert hours to

cycles, divide by 2

To convert hours to

cycles, divide by 5

To convert hours to

cycles, divide by 5

Stage 2 Wheel

4002T96P02 TF3

OR

4002T96P06

To convert hours to

cycles, divide by 2

To convert hours to

cycles, divide by 5

To convert hours to

cycles, divide by 5

Life Limits

Part Name/

Part Number Non-RHL Utility RHL

Stage 1 Wheel

4002T17P02 TF3

OR

4002T17P06

Hours

6,500

Cycles

3,250

Hours

3,200

Cycles

640

Hours

3,000

Cycles

600

Stage 2 Wheel

4002T96P02 TF3

OR

4002T96P06

Hours

10,000

Cycles

5,000

Hours

6,600

Cycles

1,320

Hours

4,200

Cycles

840

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

Deleted

Figure 1

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

Compressor Rotor Components

Figure 2

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

Turbine Rotor Components

Figure 3

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

Power Turbine Rotor Components

Figure 4

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

4. APPENDIX A - FIELD MANAGEMENT PLAN

(1) Compressor spools P/N 5124T94G02, P/N 6010T57G04, P/N 6010T57G07, and

P/N 6010T57G08 may utilize the following Field Management Plan in order to

minimize the operational impact on their fleets.

(a) For compressor spools that have operated in RHL or Utility operations:

1 If the calculated CSN is less than 12,600 cycles, remove the compressor

spool from service before exceeding 12,800 CSN or 10,000 hours TSN.

2 If the calculated CSN is 12,600 or greater, remove the compressor spool

from service within 200 cycles from the effective date of the AD, but not

to exceed 13,000 CSN or 10,000 hours TSN.

(b) For compressor spools that have not operated in RHL or Utility operations:

1 If the total accumulated CSN is less than 10,800, remove the compressor

spool from service before exceeding 12,800 CSN or 10,000 hours TSN,

whichever occurs first.

2 If the total accumulated CSN is 10,800 or greater, and a shop visit occurs

before 12,800 CSN, remove the compressor spool from service before

exceeding 12,800 CSN but not to exceed 10,000 hours TSN.

3 If the total accumulated CSN is 10,800 or greater, and a shop visit does

not occur before 12,800 CSN, remove the compressor spool from service

at the next shop visit not to exceed 2,000 cycles from the effective date of

the AD or 10,000 hours TSN.

(c) Compressor spools beyond the life limit of 12,800 calculated total cycles must

be removed from service before September 30, 2019.

NOTE: The engine may not operate over the hourly life limit in any

circumstance.

(2) Utility operators may utilize the following Field Management Plan for the parts in

Table V in order to minimize the operational impact on their fleets.

TABLE V - PARTS INCORPORATED IN THE UTILITY OPERATORS FIELD

MANAGEMENT PLAN

Part Description and Life

Information Part Numbers

Compressor Stage 1 Disk

4,000 hours / 9,900 cycles

Utility/RHL Factor = 2.4

37D400218P101

37D400218P102

37D400359P101

37D400359P102

3920T11P01

3920T11P02

5001T20P01

5001T20P02

5013T06P01

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

TABLE V - PARTS INCORPORATED IN THE UTILITY OPERATORS FIELD

MANAGEMENT PLAN

Part Description and Life

Information Part Numbers

Front Disk Shaft

6,100 hours / 8,500 cycles

Utility/RHL Factor = 1.6

5005T34P01

5005T34P03

5008T79P02

Compressor Spool

10,000 hours / 26,000 cycles

Utility/RHL Factor = 6.0

37R600152G001CEB-147

37R600152G002CEB-147

5920T13P23

5920T13P25

5920T13P26

5920T13P28

5920T13P41

5920T13P42

5920T82G07

6010T57G01CEB-147

6010T57G02CEB-147

6010T57G03

6010T57G05CEB-147

6010T57G06CEB-147

Compressor Spool

10,000 hours / 12,800 cycles

Utility/RHL Factor = 3.0

5124T94G02

6010T57G04

6010T57G07

6010T57G08

Compressor Rear Shaft

9,000 hours / 9,600 cycles

Utility/RHL Factor = 3.2

5016T95P01

5016T95P04

Compressor Rear Shaft

9,000 hours / 16,500 cycles

Utility/RHL Factor = 3.2

5016T95P06

Compressor Rear Seal

6,100 hours / 9,600 cycles

Utility/RHL Factor = 3.2

37D400061P101

37D400061P102

Compressor Rear Seal

6,500 hours / 11,500 cycles

Utility/RHL Factor = 3.2

4017T37P02

Turbine Front Shaft

10,000 hours / 40,000 cycles

Utility/RHL Factor = 4.0

5003T35P01

5126T00P01

573D358P002

Coupling Shaft

8,100 hours / 11,500 cycles

Utility/RHL Factor = 1.5

4001T26P01

5126T23P01

Turbine Rear Shaft

10,000 hours / 40,000 cycles

Utility/RHL Factor = 4.0

37D400244P101

4005T29P01

5124T95P01

July 09, 1979 CT58 S/B 72-A0162

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ENGINE - Service Life Limits for Rotating Parts

TABLE V - PARTS INCORPORATED IN THE UTILITY OPERATORS FIELD

MANAGEMENT PLAN

Part Description and Life

Information Part Numbers

Cooling Plates

4,000 hours / 13,000 cycles

Utility/RHL Factor = 3.2

3000T88P02

3002T25P01

3002T27P01

37C300055P101

5124T96P01

5124T97P01

5124T98P01

5124T99P01

645C332P002

645C334P002

645C336P002

Power Turbine Wheel and

Shaft

8,100 hours / 15,100 cycles

Utility/RHL Factor = 2.1

37D400151P101

37D400151P102

37D400229P103

5002T30P01

5003T57P01

(3) For life-limited parts that have not operated in Utility operation, remove the parts

from service before they exceed their cyclic or hourly life limit, whichever occurs

first.

(4) For life-limited rotating parts that have operated in Utility operations, remove the

parts from service as follows:

(a) If the calculated CSN is less than 95 percent of the cyclic life limit, remove

the part from service before exceeding the cyclic or the hourly life limit,

whichever occurs first.

(b) If the calculated CSN is 95 percent of the cyclic life limit or greater and a

shop visit occurs before 100 percent of the cyclic life limit, remove the part

from service before exceeding the cyclic or the hourly life limit, whichever

occurs first.

(c) If the calculated CSN is 95 percent of the cyclic life limit or greater and a shop

visit does not occur before 100 percent of the cyclic life limit, remove the part

from service before accumulating an additional five percent of the cyclic life

limit, but not to exceed the hourly life limit.

(5) This Field Management Plan applies up to September 30, 2019, after which all

life-limited parts exceeding their published life limits must be removed and replaced.

NOTE: The engine may not operate over the hourly life limit in any circumstance.

July 09, 1979 CT58 S/B 72-A0162

Revision 16, January 07, 2015 PAGE 27

GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or first page.