M601D

M601D ENGINE

M601D/1a
Check of the contact closing moment and lubrication of the automatic feathering switch lever.
May 10, 1983

M601D/2a
Preservation and dispatch of the engine in container for repair.
Dec 1, 1982

M601D/3a
Operation of the M601D engines replacing the M601B engines in the airframe.
Jul 1, 1983

M601D/4a
The manufacturer specified the period of operation of the LUN 2132-8 and 2132.01-8 starter/generator and the works that must to be carried out after 300 ± 15 and 600 ± 30 hour operation.
Mar 1, 1984

M601D/5a
Replacement of the M601-577.9 chip signaler in the accessory gearbox.
Oct 1, 1983

M601D/6a
Recording every balked landing and the total number of balked landings considered upon every closing of the Engine Log Book and removal of the engine from the aircraft.
Mar 1, 1984

M601D/7a
Examination of the mechanical condition of the centrifugal compressor impeller of the M601D engines in flight operation (manufactured in 1983).
May 10, 1984

M601D/8a
Checking and adjusting the moment of contact making/breaking on the automatic feathering switch of the engine control lever during a 300 hour inspection of the engine.
Aug 1, 1984

M601D/9a
A modified method of recording equivalent cycles in the engine Log Book.
Nov 11, 1984

M601D/10a
M601D, B engines operating on the L 410 UVP aircraft in Air Force units of the Czechoslovak People's Army: Time limit extension of TBO from 5 to 7 years.
Jan 1, 1988

M601D/11a
Changes to the Maintenance Manual for WALTER M601B, B-1, D, E, Z engines.
Nov 3, 1987

M601D/12a
Use of modified metallic containers for M601E engines with secured exhaust bends. Unification and refinement of M601E engine documentation in Czech and Russian in response to critical remarks on operational experience.
Jan 19, 1988

M601D/13a
Use of adjacent cards „Engine Entered Service".
May 1, 1988

M601D/14a
The total number of landings recorded in the engine Log Book and considered at each removal of the engine from aircraft.
May 1, 1988

M601D/15a
Replacement of the insulating cover of the LUN 1476-8 apparatus by the M601-8002.6 nut.
Dec 20, 1988

M601D/16a
N25F-3 spark plugs.
May 18, 1989

M601D/17a
The 14 UA 41/R spark gap arc-over voltage control in the JT 607 C and JT 607 D systems.
Jan 1, 1989

M601D/18a
Issue of M601-P10-12B, Appendix 2: Regulations governing the storage, preservation and de-preservation of M601 engines in operation.
Annex 1: Instruction Sheet for the replacement of oil permitted for use in
operation by M601 Engine Specifications.
Aug 8, 1989

M601D/19a
Mandatory replacement of the M601-3220.6 free turbine discs of certain numbers at the first overhaul of M601D engines. Engine operation is not limited.
Sep 21, 1989

M601D/20a
Replacement of M601-3220.6 free turbine discs of certain numbers at overhaul of M601D engines. Engine operation permitted for a given period until overhaul in full accordance with the Flight Operation Manual.
Dec 14, 1990

M601D/22a
Use of new oil kinds in M601D, E, and Z engines.
Jan 23, 1991

M601D/23a
Supplement of the list of preserving oils by KONKOR 103 (OK-5A) and specification of the mixture rate with the fuel (Aviation Kerosene) for engine preservation into the WALTER M601 Flight Operation Manuals.
Dec 18, 1992

M601D/24a
The Maintenance Manual for M601D engine operation on the PZL 106-BT KRUK TURBO aircraft for a Polish customer is extended by new information obtained from the manufacturer of the LUN 5260.03 integrated electronic limiter unit (IELU).
Note: Valid for WALTER M601D-1 engine.
The bulletin have been issued earlier than WALTER M601D-1 Type Certificate.
Mar 19, 1993

M601D/25a
Substitution of the new diagram used for engine power output check of the M601D engine installed in the PZL 106-BT KRUK TURBO aircraft for the old one and canceling of one redundant diagram.
Note: Valid for WALTER M601D-1 engine. The bulletin have been issued earlier than WALTER M601D-1 Type Certificate.
Aug 9, 1993

M601D/26a
Check of the gas generator rotor idle speed adjustment.
Nov 15, 1994

M601D/27a
Limited life of gas generator turbine blades Dwg. No. M601-3372.6 of WALTER M601D engines shown in the enclosed list.
Oct 23, 1996

A M601D/28a
Limited life of gas generator turbine blades Dwg. No. M601-3372.6 of WALTER M601D engines, Serial No. 852020.
Mar 12, 1997

A M601D/29a
Exchange of relief valve for fuel control unit LUN 6590.03, LUN 6590.04, LUN 6590.05, LUN 6590.06.
Oct 5, 2000

M601D/30a
Replacement CHAMPION CH34630 spark plugs.
Feb 26, 2001

M601D/31a
Improved of the Electric Contact Between Spark Plug and Ignition Cable of the UNISON Ignition Exciter.
Jan 10, 2002

M601D/32a
Inspection of condition of the M601-264.7 combustion chamber liner in flight operation
Mar 3, 2003

M601D/33a
Replacement of the M601-264.7 Combustion Chamber Inner Liner
Mar 17, 2003

M601D-1 ENGINE

M601D/24a
The Maintenance Manual for M601D engine operation on the PZL 106-BT KRUK TURBO aircraft for a Polish customer is extended by new information obtained from the manufacturer of the LUN 5260.03 integrated electronic limiter unit (IELU).
Note: Valid for WALTER M601D-1 engine.
The bulletin have been issued earlier than WALTER M601D-1 Type Certificate.
Mar 19, 1993

M601D/25a
Substitution of the new diagram used for engine power output check of the M601D engine installed in the PZL 106-BT KRUK TURBO aircraft for the old one and canceling of one redundant diagram.
Note: Valid for WALTER M601D-1 engine. The bulletin have been issued earlier than WALTER M601D-1 Type Certificate.
Aug 9, 1993

M601D-1/1a
Check of the gas generator rotor idle speed adjustment.
Nov 15, 1994

M601D-1/2a
Change in abbreviated flight cycle coefficient A presented in the Engine Log Book according to free turbine disk used in the pertinent engine.
Apr 20, 1998

A M601D-1/3a
Exchange of relief valve for fuel control unit LUN 6590.03, LUN 6590.04, LUN 6590.05, LUN 6590.06.
Oct 5, 2000

M601D-1/4a
Replacement CHAMPION CH34630 spark plugs.
Feb 26, 2001

M601D-1/5a
Improvement of the Electric Contact Between Spark Plug and Ignition Cable of the UNISON Ignition Exciter.
Jan 10, 2002

M601D-1/6a
Inspection of condition of the M601-264.7 combustion chamber liner in flight operation
Mar 3, 2003

M601D-1/7a
Replacement of the M601-264.7 Combustion Chamber Inner Liner
Mar 17, 2003

M601D-1/8a
Second revised edition of „WALTER M601D-1 Turboprop Engine Operation Manual“ (Manual Part No. 0982402)
April 5, 2003

M601D-2 ENGINE

M601D-2/1a
Limitation of propeller speed overshoots in order to ensure required cyclic life of the WALTER M601D-2 engine in the OPERATION MANUAL (Manual Part No. 0982415).
Jan 14, 2000

M601D-2/2a
Improvement of the Electric Contact Between Spark Plug and Ignition Cable of the UNISON Ignition Exciter.
Jan 10, 2002

M601D-2/3a
Operation manual for WALTER M601D-11, M601D-11NZ and M601D-2 engines, manual part no. 0982415, issue second
Sept 23, 2003

M601D-11 ENGINE

M601D-11/1a
Improved of the Electric Contact Between Spark Plug and Ignition Cable of the UNISON Ignition Exciter.
Jan 10, 2002

M601D-11/2a
Operation manual for WALTER M601D-11, M601D-11NZ and M601D-2 engines, manual part no. 0982415, issue second
Sept 23, 2003

M601D-11/3a
Reduction in Propeller Rotational Speed
Aug 11, 2004

M601D-11NZ ENGINE

M601D-11NZ/1a
Limitation of gas generator speed and propeller speed in the OPERATION MANUAL (Manual Part No.0982415) in compliance with the Technical Specification of the WALTER M601D-11NZ engine.
Jan 14, 2000

M601D-11NZ/2a
Limitation of gas generator speed and propeller speed in the MAINTENANCE MANUAL (Manual Part No.0982064) in compliance with the Technical Specification of the WALTER M601D-11NZ engine.
Feb 7, 2000

A M601D-11NZ/3a
Exchange of relief valve for fuel control unit LUN 6590.03, LUN 6590.04, LUN 6590.05, LUN 6590.06.
Oct 5, 2000

M601D-11NZ/4a
Replacement CHAMPION CH34630 spark plugs.
Feb 26, 2001

M601D-11NZ/5a
Improvement of the Electric Contact Between Spark Plug and Ignition of the UNISON Ignition Exciter.
Jan 10, 2002

M601D-11NZ/6a
Inspection of condition of the M601-264.7 combustion chamber liner in flight operation
Mar 3, 2003

M601D-11NZ/7a
Replacement of the M601-264.7 Combustion Chamber Inner Liner
Mar 17, 2003

M601D-11NZ/8a
Operation manual for WALTER M601D-11, M601D-11NZ and M601D-2 engines, manual part no. 0982415, issue second,
Sept 23, 2003