M601E

M601E ENGINE

M601E/3b
Increase of the running period of the LUN 7816-8 propeller governor and LUN 2201.03-8 ignition unit.
Jan 1, 1987

M601E/5b
Increase of the number of the cycles until WALTER M601E engine overhaul.
Nov 19, 1987

M601E/6b
Determination of the total service life of WALTER M601E engine.
Jun 1, 1988

M601E/7b
Checking the tightness of the fuel control assembly at extremely low temperatures.
Dec 15, 1988

M601E/8b
Improvement of the rear bulkhead of WALTER M601E spare engines manufactured not later than June 1, 1989.
Aug 8, 1989

M601E/10b
Extension of the current two-year preservation period to three years for engines delivered to the U.S.S.R .
Jan 9, 1991

M601E/11b
Increase of the number of cycles until WALTER M601E engine overhaul for engines in airways operation in the former U.S.S.R.
Feb 12, 1992

M601E/12b
Observance of general principles for the fuel conservation.
Feb 12, 1992

M601E/13b
Possibilities of extending of the Time Between Overhauls (TBO) determined by number of years for all M601 engine models which have not yet consumed TBO determined by number of flight hours and/or number of cycles (equivalent cycles).
Nov 14, 1994

M601E/14b
Cancellation of monitoring and recording in "Engine Log Book" of the 20 % of the engine ground operation period. This concerns all M601 models since new edition of the "Engine Log Book" has been issued.
Aug 31, 1995

M601E/15b
Features of the B3V oil and of the "Kaptax" antiwear agent when used in all models of the M601 engine.
Nov 23, 1995

M601E/16b
Change in name of the "WALTER" aircraft engine manufacturer from former MOTORLET a.s. to traditional WALTER ENGINES a.s. Support of operation of used engines of the following models: WALTER M601A, M601B, M601D, M601D-1, M601E and M601Z.
Users from the former Soviet Union and countries of Eastern Europe have been selling these engines either as individual engines or together with L 410, Z37T, PZL-106BT-601 airplanes.
Mar 29, 1996

M601E/17b
Possibilities of extending of the Time Between Overhauls (TBO) determined by number of years for all flight hours and/or number of cycles (equivalent cycles).
Mar 29, 1996

M601E/18b
Edition of "Instruction for oil brand change" which forms Supplement No 1B to the "Regulation for equipment, preservation, storage and de-preservation of WALTER M601 engines, accessories and spare parts", Appendix 2
of the M601-P10-12B Regulation.
May 13, 1996

M601E/19b
Compressor recovery wash concerning all WALTER M601 engine models
in operation.
Nov 1, 1997

M601E/21b
Possibility of replacement of the LUN 2201.03-8 ignition unit
by the UNISON P/N 9049765-1 ignition unit.
Dec 2, l998

M601E/22b
Possibility of extension of operation time between replacement of the M601-529.7 filtration cartridge. Extension of operation life of the N 25 F-3 spark plug according to the technical condition.
Feb 11, 2000

M601E/23b
Modification of the M601-418.7, M601-419.7 exhaust nozzles.
Apr 28, 2000

M601E/24b
Possibility of consuming increased number of equivalent flight cycles for WALTER M601E engines S/N 864024 and 864032.
Jun 27, 2002

M601E/25b
Cancellation of service life limits and of fixed number of overhauls at all WALTER M601 engine models.
Sep 5, 2002

M601E/26b
The Kathon FP 1.5 biocide can be used as an ingredient to the fuel as far as the microbial contamination of the fuel has been found out. The ROYCO TURBINE OIL 560 can be used at all WALTER M601 engine models.
Oct 18, 2002

M601E/25b R1
Cancellation of service life limits and of fixed number of overhauls at all WALTER M601 engine models.
Dec 6, 2003

M601E/27b
Possibility of consuming increased number of equivalent flight cycles for WALTER M601E engines S/N 911031 and 912036.
Feb 16, 2004

M601E/28b
A) Engine Air Path Washing for Salt Deposit Removal.
B) Optional Compressor Recovery Wash
Aug 11, 2004

M601E/28b R 1
A) Engine Air Path Washing for Salt Deposit Removal.
B) Optional Compressor Recovery Wash
Mar 11, 2005

M601E/29b
Transfer of the WALTER M601 engine Type Certificates and all activities and responsibilities in the sector of the civil aviation from WALTER a.s. to WALTER ENGINES a.s.
Apr 28, 2005

M601E/30b Issue of the Type Certificate EASA.E.070 for WALTER M601 turbopropeller series engines
May 13, 2005

M601E/31b
Possibility of consuming increased number of equivalent flight cycles for WALTER M601E engine S/N 873 040.
Oct 30, 2005

M601E/28b R 2
A) Engine Air Path Washing for Salt Deposit Removal.
B) Compressor Recovery Wash
Feb 3, 2006

M601E/32b
Possibility of consuming increased number of equivalent flight cycles for WALTER M601E engines S/N 873042 and 902031.
Jan 19, 2007

M601E/33b
Possibility of consuming increased number of equivalent flight cycles for WALTER M601E engines S/N 863031 and 912028.
Jul 11, 2007

M601E/34b
Possibility of consuming increased number of equivalent flight cycles for WALTER M601E engines S/N 892050 and 864004.
Sep 5, 2007

M601E/35b
Possibility of consuming increased number of equivalent flight cycles for WALTER M601E engine S/N 873033.
Nov 23, 2007

M601E-11 ENGINE

M601E-11/1b
Cancellation of monitoring and recording in "Engine Log Book" of the 20 % of the engine ground operation period. This concerns all M601 models since new edition of the "Engine Log Book" has been issued.
Aug 31, 1995

M601E-11/2b
Features of the B3V oil and of the "Kaptax" antiwear agent when used in all models of the M601 engine.
Nov 23, 1995

M601E-11/3b
Change in name of the "WALTER" aircraft engine manufacturer from former MOTORLET a.s. to traditional WALTER ENGINES a.s. Support of operation of used engines of the following models: WALTER M601A, M601B, M601D, M601D-1, M601E and M601Z.
Users from the former Soviet Union and countries of Eastern Europe have been selling these engines either as individual engines or together with L 410, Z37T, PZL-106BT-601 airplanes.
Mar 29, 1996

M601E-11/4b
Possibilities of extending of the Time Between Overhauls (TBO) determined by number of years for all flight hours and/or number of cycles (equivalent cycles).
Mar 29, 1996

M601E-11/5b
Edition of "Instruction for oil brand change" which forms Supplement No 1B to the "Regulation for equipment, preservation, storage and de-preservation of WALTER M601 engines, accessories and spare parts", Appendix 2
of the M601-P10-12B Regulation.
May 13, 1996

M601E-11/6b
Compressor recovery wash concerning all WALTER M601 engine models
in operation.
Nov 1, 1997

M601E-11/8b
Possibility of replacement of the LUN 2201.03-8 ignition unit by the UNISON P/N 9049765-1 ignition unit.
Dec 2, l998

M601E-11/9b
Possibility of extension of operation time between replacement of the M601-529.7 filtration cartridge. Extension of operation life of the N 25 F-3 spark plug according to the technical condition.
Feb 11, 2000

M601E-11/10b
Modification of the M601-418.7, M601-419.7 exhaust nozzle.
Apr 28, 2000

M601E-11/11b
Possibility of consuming increased number of equivalent flight cycles for WALTER M601E-11 engines S/N 894034 and 901051.
Apr 29, 2002

M601E-11/12b
Increase of the ambient operational temperature of the WALTER M601E-11, WALTER M601E-11S, WALTER M601E-11A, WALTER M601E-11AS engine models.
Aug 29, 2002

M601E-11/13b
Cancellation of the service life limits and of fixed number of overhauls at all WALTER M601 engine models.
Sep 5, 2002

M601E-11/14b
The Kathon FP 1.5 biocide can be used as an ingredient to the fuel as far as the microbial contamination of the fuel has been found out. The ROYCO TURBINE OIL 560 can be used at all WALTER M601 engine models.
Oct 18, 2002

M601E-11/13b R1
Cancellation of service life limits and of fixed number of overhauls at all WALTER M601 engine models.
Dec 6, 2003

M601E-11/15b
A) Engine Air Path Washing for Salt Deposit Removal.
B) Optional Compressor Recovery Wash
Aug 11, 2004

M601E-11/16b
Occurrence of sound effect on some engines with low pressure airbleed, which are designated as BC 01 building configuration.
Aug 11, 2004

M601E-11/17b
Possibility of the WALTER M601E-11 engine model conversion to WALTER M601E-11A engine model
Sept 27, 2004

M601E-11/15b R1
A) Engine Air Path Washing for Salt Deposit Removal.
B) Optional Compressor Recovery Wash
Mar 11, 2005

M601E-11/18b
Transfer of the WALTER M601 engine Type Certificates and all activities and responsibilities in the sector of the civil aviation from WALTER a.s. to WALTER ENGINES a.s. Apr 28, 2005
M601E-11/19b Issue of the Type Certificate EASA.E.070 for WALTER M601 turbopropeller series engines
May 13, 2005

M601E-11/15b R 2
A) Engine Air Path Washing for Salt Deposit Removal.
B) Compressor Recovery Wash
Feb 3, 2006

M601E-11S ENGINE

M601E-11S/1b
Increase of the ambient operational temperature of the WALTER M601E-11, WALTER M601E-11S, WALTER M601E-11A, WALTER M601E-11AS engine models.
Aug 29, 2002

M601E-11S/2b
Cancellation of service life limits and of fixed number of overhauls at all WALTER M601 engine models.
Sep 5, 2002

M601E-11S/3b
The Kathon FP 1.5 biocide can be used as an ingredient to the fuel as far as the microbial contamination of the fuel has been found out. The ROYCO TURBINE OIL 560 can be used at all WALTER M601 engine models.
Oct 18, 2002

M601E-11S/4b
A) Engine Air Path Washing for Salt Deposit Removal. B) Optional Compressor Recovery Wash
August 11, 2004

M601E-11S/5b
Occurrence of sound effect on some engines with low pressure bleed air, which are designated as BC 01 building configuration
August 11, 2004

M601E-11S/4b R 1
A) Engine Air Path Washing for Salt Deposit Removal.
B) Optional Compressor Recovery Wash
Mar 11, 2005

M601E-11S/6b
Transfer of the WALTER M601 engine Type Certificates and all activities and responsibilities in the sector of the civil aviation from WALTER a.s. to WALTER ENGINES a.s.
Apr 28, 2005

M601E-11S/7b
Issue of the Type Certificate EASA.E.070 for WALTER M601 turbopropeller series engines
May 13, 2005

M601E-11S/4b R 2
A) Engine Air Path Washing for Salt Deposit Removal.
B) Compressor Recovery Wash
Feb 3, 2006

M601E-11A ENGINE

M601E-11A/1b
Increase of the ambient operational temperature of the WALTER M601E-11, WALTER M601E-11S, WALTER M601E-11A, WALTER M601E-11AS engine models.
Aug 29, 2002

M601E-11A/2b
Cancellation of service life limits and of fixed number of overhauls at all WALTER M601 engine models.
Sep 5, 2002

M601E-11A/3b
The Kathon FP 1.5 biocide can be used as an ingredient to the fuel as far as the microbial contamination of the fuel has been found out. The ROYCO TURBINE OIL 560 can be used at all WALTER M601 engine models.
Oct 18, 2002

M601E-11A/4b
A) Engine Air Path Washing for Salt Deposit Removal. B) Optional Compressor Recovery Wash
August 11, 2004

M601E-11A/5b
Occurrence of sound effect on some engines with low pressure bleed air, which are designated as BC 01 building configuration
August 11, 2004

M601E-11A/4bR 1
A) Engine Air Path Washing for Salt Deposit Removal.
B) Optional Compressor Recovery Wash
Mar 11, 2005

M601E-11A/6b
Transfer of the WALTER M601 engine Type Certificates and all activities and responsibilities in the sector of the civil aviation from WALTER a.s. to WALTER ENGINES a.s.
Apr 28, 2005

M601E-11A/7b
Issue of the Type Certificate EASA.E.070 for WALTER M601 turbopropeller series engines
May 13, 2005

M601E-11A/4b R 2
A) Engine Air Path Washing for Salt Deposit Removal.
B) Compressor Recovery Wash
Feb 3, 2006

M601E-11AS ENGINE

M601E-11AS/1b
Increase of the ambient operational temperature of the WALTER M601E-11, WALTER M601E-11S, WALTER M601E-11A, WALTER M601E-11AS engine models.
Aug 29, 2002

M601E-11AS/2b
Cancellation of service life limits and of fixed number of overhauls at all WALTER M601 engine models.
Sep 5, 2002

M601E-11AS/3b
The Kathon FP 1.5 biocide can be used as an ingredient to the fuel as far as the microbial contamination of the fuel has been found out. The ROYCO TURBINE OIL 560 can be used at all WALTER M601 engine models.
Oct 18, 2002

M601E-11AS/4b
A) Engine Air Path Washing for Salt Deposit Removal. B) Optional Compressor Recovery Wash
August 11, 2004

M601E-11AS/5b
Occurrence of sound effect on some engines with low pressure bleed air, which are designated as BC 01 building configuration
August 11, 2004

M601E-11AS/4bR 1
A) Engine Air Path Washing for Salt Deposit Removal.
B) Optional Compressor Recovery Wash
Mar 11, 2005

M601E-11AS/6b
Transfer of the WALTER M601 engine Type Certificates and all activities and responsibilities in the sector of the civil aviation from WALTER a.s. to WALTER ENGINES a.s.
Apr 28, 2005

M601E-11AS/7b
Issue of the Type Certificate EASA.E.070 for WALTER M601 turbopropeller series engines
May 13, 2005

M601E-11AS/4b R 2
A) Engine Air Path Washing for Salt Deposit Removal.
B) Compressor Recovery Wash
Feb 3, 2006

M601E-21 ENGINE

M601E-21/1b
Possibilities of extending of the Time Between Overhauls (TBO) determined by number of years for all M601 engine models which have not yet consumed TBO determined by number of flight hours and/or number of cycles (equivalent cycles).
Nov 14, 1994

M601E-21/2b
Cancellation of monitoring and recording in "Engine Log Book" of the 20 % of the engine ground operation period. This concerns all M601 models since new edition of the "Engine Log Book" has been issued.
Aug 31, 1995

M601E-21/3b
Features of the B3V oil and of the "Kaptax" antiwear agent when used in all models of the M601 engine.
Nov 23, 1995

M601E-21/4b
Change in name of the "WALTER" aircraft engine manufacturer from former MOTORLET a.s. to traditional WALTER ENGINES a.s. Support of operation of used engines of the following models: WALTER M601A, M601B, M601D, M601D-1, M601E and M601Z.
Users from the former Soviet Union and countries of Eastern Europe have been selling these engines either as individual engines or together with L 410, Z37T, PZL-106BT-601 airplanes.
Mar 29, 1996

M601E-21/5b
Possibilities of extending of the Time Between Overhauls (TBO) determined by number of years for all flight hours and/or number of cycles (equivalent cycles).
Mar 29, 1996

M601E-21/6b
Edition of "Instruction for oil brand change" which forms Supplement No 1B to the "Regulation for equipment, preservation, storage and de-preservation of WALTER M601 engines, accessories and spare parts", Appendix 2
of the M601-P10-12B Regulation.
May 13, 1996

M601E-21/7b
Compressor recovery wash concerning all WALTER M601 engine models in operation.
Nov 1, 1997

M601E-21/9b
Possibility of replacement of the LUN 2201.03-8 ignition unit by the UNISON P/N 9049765-1 ignition unit.
Dec 2, l998

M601E-21/10b
Possibility of extension of operation time between replacement of the M601-529.7 filtration cartridge. Extension of operation life of the N 25 F-3 spark plug according to the technical condition.
Feb 11, 2000

M601E-21/11b
Modification of the M601-418.7, M601-419.7 exhaust nozzle.
Apr 28, 2000

M601E-21/12b
Cancellation of service life limits and of fixed number of overhauls at all WALTER M601 engine models.
Sep 5, 2002

M601E-21/13b
The Kathon FP 1.5 biocide can be used as an ingredient to the fuel as far as the contamination of the fuel has been found out. The ROYCO TURBINE OIL 560 can be used at all WALTER M601 engine models.
Oct 18, 2002

M601E-21/14b
A) Engine Air Path Washing for Salt Deposit Removal. B) Optional Compressor Recovery Wash
August 11, 2004

M601E-21/12b R1
Cancellation of service life limits and of fixed number of overhauls at all WALTER M601 engine models.
Dec 6, 2003

M601E-21/14b R 1
A) Engine Air Path Washing for Salt Deposit Removal.
B) Optional Compressor Recovery Wash
Mar 11, 2005

M601E-21/15b
Transfer of the WALTER M601 engine Type Certificates and all activities and responsibilities in the sector of the civil aviation from WALTER a.s. to WALTER ENGINES a.s.
Apr 28, 2005

M601E-21/16b
Issue of the Type Certificate EASA.E.070 for WALTER M601 turbopropeller series engines
May 13, 2005

M601E-21/14b R 2
A) Engine Air Path Washing for Salt Deposit Removal.
B) Compressor Recovery Wash
Feb 3, 2006