ENGINE - Service Life Limits for Rotating Parts

GE PROPRIETARY INFORMATION
The information contained in this document is GE proprietary information and is disclosed in confi dence. It is the property of GE and shall not be used, disclosed to others or reproduced withoutthe 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, modi fi cations, spare parts, designs, or con fi guration 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 Rev ision 16, January 07, 2015 PAGE 1 of 27ENGINE - Service Life Limits for Rotating Parts

TRANSMITTAL INFORMATION REVISION 16 TO ALERT SERVICE BULLETIN 72-A0162 Revision 16 is issued to update paragraphs 1., P LA N N I N G I N F O R M A T I O N , 3., A C C O M P L I S H M E N T I N S T R U C T I O N S , and 4., A P P E N D I X 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. P LA N N I N G I N F O R M A T I O N A. E f fe ct i v i ty 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. C o n c u r re n t R e q u i re m e n ts None. C. D e s c r i p t i o n Operators are required to maintain the service records of engine life-limited rotating parts. Service hours and cycles (calculated according to paragraph 3., A C C O M P L I S H M E N T I N S T R U C T I O N S ), 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. N O T E : 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 revisi on 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 A C C O M P L I S H M E N T I N S T R U C T I O N S of this Alert Service Bulletin. (1) De fi nitions: (a) Cycle: de fi ned as any engine operating sequence involving an engine start, one acceleration to takeoff power, and shutdown.

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(b) Non-Repetitive Heavy-Lift (Non-RHL) operations: de fi ned 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: de fi ned 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: de fi ned 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: de fi ned as the induction of an engine into a shop or facility for maintenance in accordance with Overhaul Manual SEI-183. D. C o m p l i a n c e 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 A P P E N D I X A of this Alert Service Bulletin, in order to minimize the operational impact on their fl eets. (2) Utility operators can utilize the Fi eld Management Plan described in paragraph 4.B. of A P P E N D I X A of this Alert Service Bulletin, in order to minimize the operational impact on their fl eets. E. R e a s o n (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 U tility operations have experienced premature, low-cycle fatigue damage to some parts.

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(3) Cause: The conventional basis for determining the number of cycles accumulated on rotating parts has been de fi ned as a start, accelerate to takeoff power, and shutdown in a speci fi c 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 pro fi le for Non-RHL operations to re fl ect the current operations of the Non-RHL fl eet. This revision of the Alert Service Bulletin has also been updated with clari fi cation 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 pro fi le as de fi ned 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 A P P E N D I X A must be applied in accordance with paragraph 1.D., C o m p l i a n ce

. F. A p p ro v a l This Alert Service Bulletin has been reviewed by the FAA and the repair(s) and modi fi cation(s) herein comply with the appl icable 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 Certi fi cation Of fi ce, 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. M a n p owe r No additional man-hours are required when compliance with this Alert Service Bulletin is performed during normal overhaul. H. We i g h t a n d B a l a n c e Weight and balance are not changed.

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I. R e fe re n c e s (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. P u b l i ca t i o n s Af fe cte d Not applicable. K. P re v i o u s M o d i fi ca t i o n S e r v i c e B u l l e t i n N u m b e r S e r v i ce B u l l e t i n T i t l e 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) Identi fi cation and Inspection of Suspect Gas Generator Turbine Rotor Assembly Parts and Power Turbine Wheels that may have been Inadvertently Shotpeened.
L. I n te rc h a n g e a b i l i ty Not applicable.

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2. M A T E R I A L I N F O R M A T I O N A. M a te r i a l

- P r i c e a n d A v a i l a b i l i ty (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. I n d u s t ry S u p p o rt I n f o r m a t i o n Not applicable. C. C o n fi g u ra t i o n C h a rt Not applicable. D. P a rts D i s p o s i t i o n Terminate replaced parts. E. T o o l i n g - P r i ce a n d Av a i l a b i l i ty No special support equipment beyond that normally used during overhaul is required for compliance with this Alert Service Bulletin. 3. A C C O M P L I S H M E N T I N S T R U C T I O N S 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:

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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 D e s c r i p t i o n ), 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:
F O R M U LA F O R D E T E R M I N I N G CA L C U LA T E D C Y C L E S I N R H L O P E RA T I O N S

CALCULATED CYCLES IN RHL

OPERATIONS = HOURS FLOWN IN RHL OPERATIONS X MULTIPLYING FACTOR FOR UTILITY AND RHL OPERATIONS
F O R M U LA F O R D E T E R M I N I N G CA L C U LA T E D CY C L E S I N U T I L I TY O P E RA T I O N S

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:
F O R M U LA F O R D E T E R M I N I N G CA L C U LA T E D T O T A L CY C L E S

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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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 fi rst (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 fi rst. (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 fi rst.

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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 fi ve 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

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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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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 N O T E : 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:

S e r v i c e B u l l e t i n N u m b e r S e r v i c e B u l l e t i n T i t l e 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. C o m p re s s o r R o to r C o m p o n e n ts ( F i g u re 2 ) Table I speci fi es the life limits for the compressor rotor components that are life limited.
TABLE I - COMPRESSOR ROTOR COMPONENTS - LIFE LIMITS

P a rt N a m e a n d P a rt N u m b e r F i g u re 2 I n d e x N o

. L i fe L i m i ts H o u rs C y c l e s M u l t i p l y i n g F a cto r f o r R e p e t i t i v e H e a vy- L i f t a n d U t i l i ty O p e ra t i o n s - H o u rs to C yc l e s Stage 1 Disk 1 3920T11P01 4,000 9,900 2.4
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TABLE I - COMPRESSOR ROTOR COMPONENTS - LIFE LIMITS

P a rt N a m e a n d P a rt N u m b e r F i g u re 2 I n d e x N o

. L i fe L i m i ts H o u rs C y c l e s M u l t i p l y i n g F a cto r f o r R e p e t i t i v e H e a vy- L i f t a n d U t i l i ty O p e ra t i o n s - H o u rs to C yc l e s 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

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TABLE I - COMPRESSOR ROTOR COMPONENTS - LIFE LIMITS

P a rt N a m e a n d P a rt N u m b e r F i g u re 2 I n d e x N o

. L i fe L i m i ts H o u rs C y c l e s M u l t i p l y i n g F a cto r f o r R e p e t i t i v e H e a vy- L i f t a n d U t i l i ty O p e ra t i o n s - H o u rs to C yc l e s **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., C o m p l i a n ce

. 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

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TABLE I - COMPRESSOR ROTOR COMPONENTS - LIFE LIMITS

P a rt N a m e a n d P a rt N u m b e r F i g u re 2 I n d e x N o

. L i fe L i m i ts H o u rs C y c l e s M u l t i p l y i n g F a cto r f o r R e p e t i t i v e H e a vy- L i f t a n d U t i l i ty O p e ra t i o n s - H o u rs to C yc l e s **5920T13P44 # 10,000 20,000 6.0 *5920T82G07 10,000 26,000 6.0 Refer to paragraph 1.D., C o m p l i a n ce

. 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., C o m p l i a n ce

. 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., C o m p l i a n ce

. *6010T57G08 10,000 12,800 3.0 Refer to paragraph 1.D., C o m p l i a n ce

.
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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TABLE I - COMPRESSOR ROTOR COMPONENTS - LIFE LIMITS

P a rt N a m e a n d P a rt N u m b e r F i g u re 2 I n d e x N o

. L i fe L i m i ts H o u rs C y c l e s M u l t i p l y i n g F a cto r f o r R e p e t i t i v e H e a vy- L i f t a n d U t i l i ty O p e ra t i o n s - H o u rs to C yc l e s *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 b oth 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. T u r b i n e R o to r C o m p o n e n ts ( F i g u re 3 ) Table II speci fi es 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

P a rt N a m e a n d P a rt N u m b e r F i g u re 3 I n d e x N o

. L i fe L i m i ts H o u rs C y c l e s M u l t i p l y i n g F a cto r f o r R e p e t i t i v e H e a vy- L i f t a n d U t i l i ty O p e ra t i o n s - H o u rs to C yc l e s Front Shaft 6
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TABLE II - TURBINE ROTOR COMPONENTS - LIFE LIMITS

P a rt N a m e a n d P a rt N u m b e r F i g u re 3 I n d e x N o

. L i fe L i m i ts H o u rs C y c l e s M u l t i p l y i n g F a cto r f o r R e p e t i t i v e H e a vy- L i f t a n d U t i l i ty O p e ra t i o n s - H o u rs to C yc l e s *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 Revision 16, January 07, 2015 PAGE 16 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Service Life Limits for Rotating Parts

TABLE II - TURBINE ROTOR COMPONENTS - LIFE LIMITS

P a rt N a m e a n d P a rt N u m b e r F i g u re 3 I n d e x N o

. L i fe L i m i ts H o u rs C y c l e s M u l t i p l y i n g F a cto r f o r R e p e t i t i v e H e a vy- L i f t a n d U t i l i ty O p e ra t i o n s - H o u rs to C yc l e s *5126T23P01 8,100 11,500 1.5
Stage 2 Turbine Wheel 9 Refer to S/B 72-A0126 (CEB-206), Rev. 3, for turb ine 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 Revision 16, January 07, 2015 PAGE 17 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Service Life Limits for Rotating Parts

TABLE II - TURBINE ROTOR COMPONENTS - LIFE LIMITS

P a rt N a m e a n d P a rt N u m b e r F i g u re 3 I n d e x N o

. L i fe L i m i ts H o u rs C y c l e s M u l t i p l y i n g F a cto r f o r R e p e t i t i v e H e a vy- L i f t a n d U t i l i ty O p e ra t i o n s - H o u rs to C yc l e s 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 b oth 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 de fi ned as must be retired within 400 hours or by August 1, 1994, whichever comes fi rst.
F. P ow e r T u r b i n e R o to r C o m p o n e n ts ( F i g u re 4 ) Table III speci fi es the life limits for the power turbine rotor components that are life limited.

July 09, 1979 CT58 S/B 72-A0162 Revision 16, January 07, 2015 PAGE 18 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Service Life Limits for Rotating Parts

TABLE III - POWER TURBINE ROTOR COMPONENTS - LIFE LIMITS

P a rt N a m e a n d P a rt N u m b e r F i g u re 4 I n d e x N o

. L i fe L i m i ts H o u rs C y c l e s M u l t i p l y i n g F a cto r f o r R e p e t i t i v e H e a vy- L i f t a n d U t i l i ty O p e ra t i o n s - H o u rs to C yc l e s 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. S ta g e 1 a n d S ta g e 2 T u r b i n e W h e e l s ( F i g u re 3 , i te m s 7 a n d 9 ) Table IV speci fi es 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
T u r b i n e W h e e l C o n v e rs i o n F a cto r ( H o u rs to H o u rs )
P a rt N a m e/ P a rt N u m b e r N o n - R H L to U t i l i ty N o n - R H L to R H L U t i l i ty to R H L U t i l i ty to N o n - R H L R H L to N o n - R H L R H L to U t i l i ty Stage 1 Wheel 4002T17P02 TF3 OR 4002T17P06 0.49 0.46 0.94 2.03 2.17 1.07

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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

C o n v e rs i o n o f H o u rs to C y c l e s P a rt N a m e/ P a rt N u m b e r N o n - R H L U t i l i ty R H L 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

L i fe L i m i ts P a rt N a m e/ P a rt N u m b e r N o n - R H L U t i l i ty R H L 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

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Deleted Figure 1

July 09, 1979 CT58 S/B 72-A0162 Revision 16, January 07, 2015 PAGE 21 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Service Life Limits for Rotating Parts

Compressor Rotor Components Figure 2

July 09, 1979 CT58 S/B 72-A0162 Revision 16, January 07, 2015 PAGE 22 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Service Life Limits for Rotating Parts

Turbine Rotor Components Figure 3

July 09, 1979 CT58 S/B 72-A0162 Revision 16, January 07, 2015 PAGE 23 GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or fi rst page.ENGINE - Service Life Limits for Rotating Parts

Power Turbine Rotor Components Figure 4

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4. A P P E N D I X A

- F I E L D M A N A G E M E N T P LA N (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 fl eets. (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 fi rst. 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. N O T E : 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 fl eets.
TABLE V - PARTS INCORPORATED IN THE UTILITY OPERATORS FIELD MANAGEMENT PLAN P a rt D e s c r i p t i o n a n d L i fe I n f o r m a t i o n P a rt N u m b e rs Compressor Stage 1 Disk 4,000 hours / 9,900 cycles Utility/RHL Factor = 2.4 37D400218P101 37D400218P102 37D400359P101 37D400359P102 3920T11P01 3920T11P02 5001T20P01 5001T20P02 5013T06P01

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TABLE V - PARTS INCORPORATED IN THE UTILITY OPERATORS FIELD MANAGEMENT PLAN P a rt D e s c r i p t i o n a n d L i fe I n f o r m a t i o n P a rt N u m b e rs 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

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TABLE V - PARTS INCORPORATED IN THE UTILITY OPERATORS FIELD MANAGEMENT PLAN P a rt D e s c r i p t i o n a n d L i fe I n f o r m a t i o n P a rt N u m b e rs 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 cycl ic or hourly life limit, whichever occurs fi rst. (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 fi rst. (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 cyc lic or the hourly life limit, whichever occurs fi rst. (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 fi ve 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 publis hed life limits must be removed and replaced. N O T E : 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 fi rst page.