Rolls-Royce Corporation
M250-C47
COMMERCIAL ENGINE
BULLETIN
(CEB)
Technical Publications
Index
June 1, 2023
Rolls-Royce
COMMERCIAL ENGINE BULLETIN INDEX
CEB
No.
Subject
72-6001 Engine, Turbine, Release of No. 5 Labyrinth
Date
Published
Revision
Number
Date
Revised
2
03-17-00
Compliance
Requirement
Compliance
Completed
10-31-96
Seal Air Tube Slip Joint - Replacement
72-6002 Engine, Compressor, Scroll Assembly,
07-30-97
Replacement
72-6003 Engine Assembly, Self-Sealing Quick
Disconnect Fuzz Burning Chip Detector -
Reissue
Cancelled
11-15-97
Add
72-6004 Engine Assembly - Electrical Harness
02-22-99
Clamping Changes
72-6005 Engine, Gearbox Assembly, Gearbox Cover
01-07-99
Assembly With Splitline Flange Clearance
Cut - Replace
A-72-6006 Engine, Accessory Gearbox Assembly -
01-15-98
4
10-04-01
12-21-98
1
05-12-08
07-30-97
3
04-28-99
09-30-85
12
03-06-19
06-30-97
2
10-08-08
02-27-98
2
10-12-99
06-10-98
1
11-18-98
02-15-98
1
03-31-98
11-15-97
2
03-02-09
Improved No. 3 and No. 4 Bearings - Install
72-6007 Engine, Compressor Assembly, Release of
New Number One Bearing Housing to
Reduce One Hertz Whine
72-6008 Engine, Fuel and Control - Release of New
Accessory Harness and Anti-ice Tube C47B Only
72-6009 Model 250 Engine or Module Conversion
Authorization
72-6010 Engine, Gearbox Assembly - N2 Spare Pad
Activation Hardware for C47B Engines
Installed in Bell 407 Aircraft Only
72-6011 Engine, Compressor Assembly,
Compressor Rear Support - New Stationary
Seal Coating
72-6013 Engine, Turbine Assembly - Reidentification
12-15-97
of Fourth Stage Turbine Wheel
72-6014 Engine, Power and Accessory Gearbox
PTO Gearshaft Grooves - Add
72-6015 Engine, Compressor Assembly - Removal
of Compressor Vent Gaskets
72-6016 Engine Assembly, Self-Sealing Quick
Disconnect, Fuzz Burning Chip Detector Add
M250-C47 INDEX
Revised June 1, 2023
PAGE 1 OF 11
Rolls-Royce
COMMERCIAL ENGINE BULLETIN INDEX
CEB
No.
Subject
72-6017 Engine, Turbine Assembly, Horizontal
Date
Published
Revision
Number
Date
Revised
04-30-98
2
11-30-98
07-01-89
4
11-05-99
07-31-98
2
02-10-14
11-22-99
2
02-22-10
12-14-98
1
08-12-99
12-31-93
7
03-29-18
11-05-99
3
05-03-10
06-30-00
3
03-06-19
2
10-17-00
9
04-30-18
Compliance
Requirement
Compliance
Completed
Fireshield - Replace
72-6019 Engine, Accessory Gearbox Oil Filter
Housing - Add Bronze Bushings to “Oil In”,
“Oil Out”, and “Bypass” Ports
72-6020 Engine, Turbine Assembly - Gas Producer
Turbine Support - Replace
72-6021 Engine, Compressor Assembly - Release of
11-17-98
New Number One Bearing Scavenge Tube
72-6022 Canceled Prior To Publication
72-6023 Engine, Turbine Assembly - Recoating Of
Power Turbine Inner Shaft
72-6025 Engine, Compressor Assembly, Release of
New Number One Bearing Assembly to
Reduce One Hertz Whine
72-6026 Engine, Turbine Assembly, Authorization to
Reidentify Semi–Finished 2nd Stage
Nozzles
72-6028 Engine, Gearbox Assembly - Release Of
New Helical Torquemeter Gearshaft
Assemblies and Internal Retaining Rings
(Damper)
72-6029 Engine, Turbine Assembly - Release of
New Engine Rear Mount Assembly
72-6030 Engine Assembly - Self Sealing, Quick
07-06-99
Disconnect, Fuzz Burning Chip Detector Add C47M Only
A-72-6032 Engine Assembly - Inspection Of The New
Cancelled
Self-Sealing Magnetic Chip Detectors
A-72-6033 Engine, Compressor Assembly - New
06-09-00
Compressor scroll
A-72-6034 Engine, Turbine - One-Time Inspection For
02-23-00
Overtemperature Damage
72-6036 Engine, Combustion Section - Release of
08-04-00
Standard Combustion Liner
A-72-6037 Engine, Turbine - Inspection of 1st-Stage
03-29-00
Nozzle Shield Dome
M250-C47 INDEX
Revised June 1, 2023
PAGE 2 OF 11
Rolls-Royce
COMMERCIAL ENGINE BULLETIN INDEX
CEB
No.
Subject
72-6040 Engine, Turbine Assembly - Replacement
Date
Published
Revision
Number
Date
Revised
08-23-01
1
03-21-02
3
02–03–04
03–05–04
2
02-18-05
08-24-04
1
04-19-05
3
05-25-09
3
01-19-09
Compliance
Requirement
Compliance
Completed
of 3rd-stage Nozzle
72-6042 Engine, Turbine Assembly - Replacement
03-21-02
Of 4th-Stage Nozzle
72-6043 Engine, Main Accessory Gearbox - Release
04-25-02
of Rework And Reidentified Lip Seals
A-72-6044 Engine, Compressor Assembly -
06-21-02
Replacement of Splined Compressor Rotor
Adapter
72–6047 Engine, Oil Pump Assembly - Release of
06–22–04
New Oil Pump Gear Shafts
A-72-6048 Engine, Turbine Assembly - Inspection of
10–01–03
4th-Stage Turbine Wheels (23066744)
72-6049 Engine, Gearbox Assembly - Release of
10-13-04
New Pinion and Gear Set, Low Speed
Gearbox
A-72-6050 Engine, Turbine Section - Inspection of
Rolls–Royce Model 250-C47B Third–Stage
Turbine Wheels (6898663)
72-6051 Engine, Turbine Assembly - Release of
New 2nd-Stage Turbine Splined Adapter
and Spline Lock Nut
72-6052 Engine, Gearbox Assembly - Replacement
02-07-05
of Breather Gear Seal
72-6053 Engine, Gearbox Assembly - Release of
02-09-07
New Centrifugal Breather Gearshaft with
Molybdenum Coating
A-72-6054 Engine, Turbine Assembly - New Threshold
Cancelled
Event Recording And New Steady-State
Operation Avoidance Range Limit
72-6055 Engine, Compressor Rear Support
09-20-05
Assembly - Inspect #2 Bearing Lock Key
Slot Radii
A-72-6056 Engine, Gearbox Assembly - Inspection
06-30-05
And Rework of Gearbox Housings
A-72-6060 Engine, Turbine Assembly - Power Turbine
10-09-06
Outer Shaft
M250-C47 INDEX
Revised June 1, 2023
PAGE 3 OF 11
Rolls-Royce
COMMERCIAL ENGINE BULLETIN INDEX
CEB
No.
Subject
72-6061 Engine - Gearbox Assembly - New Power
Date
Published
Revision
Number
Date
Revised
08-17-07
5
02-08-17
08-08-07
2
02-22-08
12-30-89
3
02-04-08
06-20-14
2
07-23-21
07-30-80
4
01-14-10
04-11-11
2
04-25-22
04-30-12
3
11-28-18
12-14-12
1
08-12-13
12-18-13
1
05-19-14
03-18-13
2
12-18-13
06-17-13
1
03-24-14
03-04-13
2
03-24-14
05-14-14
2
07-29-14
06-27-14
3
01-04-17
Compliance
Requirement
Compliance
Completed
Gears
72-6062 Engine - Gearbox Assembly - New 15 HP
Spare Drive Gearshaft
72-6063 Engine, Accessory Gearbox Assembly,
Flanged Studs for Compressor Mounting
Boss Repair
72-6064 Engine - Turbine - Power Turbine Support
Rework and Reidentification on Series IV
Engines
72-6065 Engine, Power and Accessory Gearbox
Cover Assembly Turbine Support Studs -Replace
72-6067 Engine, Compressor Assembly Replacement of No. 2 Bearing
72-6068 M250-C47B, C47M, C30R/3M Series
Engine Enhancement Kit
72-6070 Engine Gearbox Assembly - Inspection of
05-07-12
Gearbox Cover
72-6071 Engine, Accessory Gearbox Assembly Improved Torquemeter Thrust (Ball)
Bearing - Install
72-6072 Engine, Gearbox Assembly - Release of
New Helical Torquemeter Gearshaft
Assemblies
72-6073 Engine, Turbine Assembly - 2nd-stage
Turbine Wheel Inspection and Peen
72-6074 Engine, Series IV Diffuser Assembly Braze Inspection
72-6075 Engine, Assembly - Inspection of Mag
Plugs to Detect Metal Generation from the
No. 2 Bearing
A-72-6077 Engine - Spur Adapter Gearshaft,
Retaining Ring
A-72-6078 Engine - Turbine Assembly - Inspection of
3rd Stage Turbine Wheels 6898663
M250-C47 INDEX
Revised June 1, 2023
PAGE 4 OF 11
Rolls-Royce
COMMERCIAL ENGINE BULLETIN INDEX
CEB
No.
Subject
A-72-6079 Engine, Compressor Assembly - Inspection
Date
Published
Revision
Number
Date
Revised
07-29-14
1
08-22-14
09-03-14
1
07-13-15
01-20-15
6
05-18-23
3
02-02-17
2
04-13-22
Compliance
Requirement
Compliance
Completed
of Front Support P/N M250-10051, M25010052, M250-10059, M250-10060
72-6080 Engine - No. 5 Bearing Retaining Ring
Replacement
72-6081 Engine - Gearbox Assembly Replacement of Oil Delivery Tube
(Piccolo Tube)
72-6082 Engine - Turbine, Removal of Aft
11-17-14
Combustion Drain Valve
72-6083 Engine - No. 8 Bearing Manufactured by
03-27-15
NHBB
A-72-6085 Engine, Combustion Assembly- Inspection
09-01-16
of Outer Combustion Case P/N M25010404
A-72-6086 Engine, Turbine Section- Replacement of
10-23-18
Rolls-Royce Single-Piece Wire Patch Outer
Combustion Case Assemblies
72-6087 M250 Gearbox Oil Check Valve, Guide,
10-16-19
Poppet, Check Valve Replace P/N
23085911 and 6898840 with New P/N
M250-10893 or P/N M250-10894
72-6088 Engine, Combustion Section- Replacement
05-10-18
of Combustion Liner
72-6089 Engine, Combustion Assembly-
02-09-18
Replacement of Outer Combustion Case
P/N 23030911
72-6090 23058137 Thrust-gas Prod Bearing Plate
12-16-22
M250-C47 INDEX
Revised June 1, 2023
PAGE 5 OF 11
Rolls-Royce
COMMERCIAL ENGINE BULLETIN INDEX
CEB
No.
Subject
73-6001 Engine, Fuel and Control, Release New
Date
Published
Revision
Number
Date
Revised
10-31-96
2
10-10-97
01-31-97
1
10-15-97
07-31-96
1
08-05-96
08-07-96
1
06-26-97
1
07-13-99
3
06-18-98
Compliance
Requirement
Compliance
Completed
05-15-96
Hardware and Software Version of
Assembly, P/N 23064650
73-6002 Cancelled Prior to Publication
73-6003 Engine, Electrical System, Install New
Clamping
73-6004 Engine, Fuel and Control, HMU to CEFA
Tube Assembly, Replace
73-6005 Cancelled Prior to Publication
73-6006 Cancelled Prior to Publication
A-73-6007 Engine, Fuel and Control, Inspection of
Main Metering Valve Spring Pin
A-73-6008 Engine, Fuel and Control, Inspection of P1
Rate Adjustment Nut
73-6009 Cancelled Prior to Publication
A-73-6010 Engine, Fuel and Control, Main Electrical
10-15-96
Harness - Replace
A-73-6011 Engine, Fuel and Control, Disconnect of N2
Overspeed
A-73-6012 Engine, Fuel and Control - One Time
Cancelled 12-197
10-31-96
Inspection of Electronic Control Unit
Assembly
73-6013 Engine, Fuel and Control - Rework of CEFA
10-15-97
to Provide Clearance For Self-Sealing Chip
Detectors
A-73-6014 Engine, Fuel and Control - FADEC
Assembly, Increased N2 Overspeed Trip
Cancelled 12-0197
Limit - 250-C47B Only
A-73-6015 Engine, Fuel and Control - Release of New
HMU Incorporating a Minimum Flow
Superseded by
CEB A-73-6017
Overspeed Solenoid Valve and New ECU 250-C47B Only
73-6016 Cancelled Prior to Publication
A-73-6017 Engine, Fuel and Control - Release of New
12-4-97
HMU Incorporating a Minimum Flow
Overspeed Solenoid Valve and New ECU
and One-Time Inspection of Internal
Components of the ECU
M250-C47 INDEX
Revised June 1, 2023
PAGE 6 OF 11
Rolls-Royce
COMMERCIAL ENGINE BULLETIN INDEX
CEB
No.
Subject
73-6018 Engine, Fuel and Control System,
Date
Published
Revision
Number
Date
Revised
4
12-19-00
2
08-17-98
04-15-99
1
08-16-99
05-07-99
1
08-04-00
11-06-98
4
12-02-03
2
06-08-01
Compliance
Requirement
Compliance
Completed
03-15-97
Permanent Magnet Alternator (PMA) Replace
73-6020 Engine, Fuel and Control, Rework of HMU
06-30-97
to Provide Clearance Cut on Housing
73-6021 Engine, Fuel Control - Hydromechanical
11-26-97
Unit Assembly - Incorporation of a
Screened Standpipe
73-6022 Engine, Fuel and Control, Hydromechanical
09-15-97
Unit (HMU) - Overspeed Solenoid Replace
73-6023 Engine, Fuel and Control - Electronic
Control Unit (ECU) - Upgrade Software
A-73-6024 Engine, Fuel and Control - One-Time
Cancelled 7-1598
02-23-98
Inspection of Internal Components of the
ECU
73-6025 Engine, Fuel and Control - Release of A
03-08-99
New Hydromechanical Unit (HMU) For
C47M Engines
73-6026 Engine, Fuel and Control - Electronic
Control Unit (ECU) Upgrade Software
73-6029 Engine, Fuel and Control - Release of New
CEFA With Increased By-Pass Valve,
Increased Thermal Lockout Temperature
and New Filter Element
A-73-6030 Engine, Fuel and Control - Inspection of
HMU Drive Splines
73-6031 Engine, Fuel and Control - Release of
03-25-99
Flared Fuel Line Seals to Prevent Fuel
Leaks
A-73-6032 Engine, Fuel And Control - Electronic
11-23-99
Control Unit (ECU) - Upgrade Hardware
And Software
73-6033 Engine, Fuel and Control -
04-28-99
Hydromechanical Unit (HMU) - Replace
73-6034 Engine, Fuel And Control - CEFA - Addition
10-11-99
Of A Second Hole For Lockwiring
73-6035 Engine, Fuel And Control -
12-03-99
Hydromechanical Unit (HMU) - Replace
M250-C47 INDEX
Revised June 1, 2023
PAGE 7 OF 11
Rolls-Royce
COMMERCIAL ENGINE BULLETIN INDEX
CEB
No.
Subject
73-6036 Engine, Fuel And Control - Release Of New
Date
Published
Revision
Number
Date
Revised
06-23-00
3
07–01–04
05–08–03
1
05–23–03
09–04–03
1
08-30-04
1
12-23-04
Compliance
Requirement
Compliance
Completed
Electronic Control Unit (ECU)
73-6039 Engine, Fuel And Control -
07-31-02
Hydromechanical Unit (HMU) - Incorporate
Screened P1 Nozzle
A–73–6040 Engine, Fuel And Control - One Time
Inspection of Power Lever (PLA) Signal of
The HMU
A-73-6041 Engine, Fuel Delivery - Release of New
Fuel Nozzle
A-73-6042 Engine, Fuel And Control -
12–02–03
Hydromechanical Unit (HMU) - Incorporate
Dual Element PLA Potentiometer
73-6044 Engine, Fuel And Control - Inspection of
01-07-05
Hydromechanical Unit (HMU) Drive Splines
A-73-6045 Engine, Fuel And Control - One Time
12-10-04
Inspection of The Hydrmechanical Unit
(HMU) P1 Nozzle
A-73-6046 Engine, Fuel And Control -
Cancelled
05-27-05
Hydromechanical Unit (HMU) Procedures
06-22-09
For Checking P1 Nozzle Screen For
Contamination
73-6048 Engine, Fuel And Control - Introduction of
01-29-07
5
02-07-11
3
06-01-16
Reversionary Governor Electronic Control
Unit (ECU)
73-6050 Engine, Fuel and Control Hydromechanical Unit Assembly Improved Design Power Lever Angle (PLA)
09-20-10
Cancelled
11/1/10
and Metering Valve (MV) Potentiometers
73-6051 Engine, Fuel and Control - Goodrich Model
04-23-09
EMC-35A Hydromechanical Unit (HMU) -
Cancelled
One-Time Inspection of Relief Valve Wall
09-07-09
Thickness
73-6052 Engine, Fuel & Control -
12-03-12
Triumph (Goodrich)
Electronic Control Unit (ECU) - Overspeed
Protection System (OSPS) Power Supply
Design Improvement
M250-C47 INDEX
Revised June 1, 2023
PAGE 8 OF 11
Rolls-Royce
COMMERCIAL ENGINE BULLETIN INDEX
CEB
No.
Subject
73-6054 Engine, Fuel and Control -
Date
Published
Revision
Number
Date
Revised
03-29-10
2
12-20-10
09-09-13
2
10-20-14
01-07-13
4
03-28-16
08-23-13
4
12-02-21
09-16-13
2
04-30-19
11-07-13
2
09-16-14
05-29-14
1
09-03-14
4
10-13-20
Compliance
Requirement
Compliance
Completed
Hydromechanical Unit (HMU) - One-Time
Torque of Metering Head Regulator Cover
Bolts
73-6055 Engine - Fuel Nozzle Spray Tip/Inner Air
Shroud Replacement
A-73-6056 Engine, Fuel & Control - Electronic Control
Unit Assembly
73-6057 Engine, Fuel & Control - Electronic Control
Unit Assembly
73-6058 Engine, Fuel & Control - Electronic Control
Unit Assembly
A-73-6059 Engine, Fuel & Control - Overspeed
Adapter
73-6060 Engine, Fuel & Control - New ECU
Software
A-73-6061 Engine Fuel and Control- FPPU(Fuel Pump
06-24-15
and Power Unit)
73-6062 Engine, Electronic Engine Control-EEC
09-17-15
73-6063 Engine, Fuel and Control- Electronic
02-29-16
Control Unit (ECU)- One-Time Inspection of
Reversionary Governor Board
73-6064
Engine, Fuel and Control – New ECU
02-14-22
Software -C47M
73-6065 Engine, Fuel Delivery - Fuel Nozzle Screen
03-18-20
Inspection
M250-C47 INDEX
Revised June 1, 2023
PAGE 9 OF 11
Rolls-Royce
COMMERCIAL ENGINE BULLETIN INDEX
CEB
No.
Subject
74-6001 Engine, Ignition System - Relocation of
Date
Published
Revision
Number
Date
Revised
08-04-00
2
06-04-02
10-31-05
1
11-18-08
Compliance
Requirement
Compliance
Completed
Ignition Lead
74-6002 Engine, Control System - Replace the Full
Authority Digital Engine Control (FADEC)
Exciter with the Non-FADEC Exciter on the
FADEC Controlled 250 Engine Model 250C47 Series
74-6003 Engine, Ignition System- Repair or
06-23-17
Replacement of Select Rolls-Royce P/N
6899093 (Unison P/N 10-614950-1) Ignition
Exciters
M250-C47 INDEX
Revised June 1, 2023
PAGE 10 OF 11
Rolls-Royce
COMMERCIAL ENGINE BULLETIN INDEX
CEB
No.
Subject
75-6001 Engine, Air System - Bleed Valve With
Date
Published
Revision
Number
Date
Revised
Compliance
Requirement
Compliance
Completed
01–30–03
Improved Durability
75-6002 Air System, Valve, Anti-Ice - Rework of
09-05-11
Anti-Ice Valve
M250-C47 INDEX
Revised June 1, 2023
PAGE 11 OF 11