GE PROPRIETARY INFORMATION 

The 1nformat1on contained m this document is GE proprietary information and 1s disclosed 1n conf1dence. It is 

the property of GE and shall not be used, disclosed to others. or reproduced w1thout the express written 

consent of GE, includ1ng, 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 

regulatory approval to do so If consent is given for reproduction in whole or 1n part, this not1ce and the notice 

set forth on each page of this document shall appear in any such reproduction 1n whole or 1n part. 

Subject: Cancelation of further use of M601 non-shot peened Gas Generator Turbine blades. 

1. PLANNING INFORMATION 

1.1. Effectivity 

All M601 engines operated on single engined aircraft, overhauled prior to 2009. 

M601 Engine Serial Numbers listed in Table 1. 

1.2. Compliance 

Replacement by authorized GEAC persons of non-shot peened Gas Generator Turbine (GGT) blades 

within 300 flight hours or 6 months* whichever is shorter. 

Note 

*As these engines reached the calendar limit. GE Aviation Czech s.r.o. recommends send these 

engines for overhaul. 

1.3. Reason 

The purpose of the replacement of the 'non-shot peened' GGT blades is the reduced fatigue life. 

1.4. Description 

The bulletin needs to be performed by GEAC CSPO trained personal. 

Replace all non-shot peened GGT blades in accordance with the supplemental information. 

ISSUED REVISED GE Aviation Czech s.r.o. PAGE No. REVISION 

MONTH DAY YEAR MONTH DAY YEAR Beranovych 65 

199 02 Praha 9 - Letnany 

Czech Republic 1 of 6 0 

12 23 2014 tel.: +420 222 538 111 

fax: +420 222 538 222 

GE PROPRIETARY INFORMATION: Subject to the restnctians on the cover page 
1.5. Approval 

The technical content of this document is approved under the authority of DOA No.EASA.21J.300. 

1.6. Manpower 

4 working days I 2 authorized persons by GEAC 

1.7. Expenses 

Covered by Customer & G EAC 

1.8. References 

ON WING HEAVV MAINTENANCE MANUAL FOR TURBOPROP ENGINES GE H-series and GE M601-

series, MANUAL No. 0130101 

1.9. Supplemental Information 

1.9.1. Replacement instructions 

Perform replacement of not shot peened Gas Generator turbine (GGT) blades according to the 

CHAPTER 6, 72.51.00 REMOVAL AND REASSEMBLY OF GENERATOR TURBINE DISC of ON WING 

HEAVV MAINTENANCE MANUAL FOR TURBOPROP ENGINES GE H-series and GE M601-series. MANUAL No. 0130101 

2. ACCOMPLISHMENT INSTRUCTIONS 

MONTH 

12 

1) Record the completion of the Service Bulletin in the Engine Log Book and Built Book, 

including the date and the name of the person who performed the work. 

2) Send the inspection report to the GEAC Design Organization in accordance with the 

Engine's Reliability program. 

3) The replaced GT blades must be sent back to GE Aviation Czech. 

ISSUED REVISED GE Aviation Czech s.r.o. PAGE No. REVISION 

DAY YEAR MONTH DAY YEAR Beranovych 65 

199 02 Proho 9- Letnony 

Czech Republic 2 of 6 0 

23 2014 tel.: +420 222 538 111 

fox: +420 222 538 222 
3. MATERIAL INFORMATION 

3.1. Material Require: use material according to the CHAPTER 6, 72.51.00 REMOVAL AND 

REASSEMBLY OF GENERATOR TURBINE DISC of ON WING HEAVY MAINTENANCE MANUAL FOR 

TURBOPROP ENGINES GE H-series and GE M601-series, MANUAL No. 0130101. Article 5- LIST OF 

COMSUMABLES, page 343 

3.2. Tooling: use tooling & equipment according to the CHAPTER 6, 72.51.00 REMOVAL AND 

REASSEMBLY OF GENERATOR TURBINE DISC of ON WING HEAVY MAINTENANCE MANUAL FOR 

TURBOPROP ENGINES GE H-series and GE M601-series, MANUAL No. 0130101. Article 4 - TOOLS 

AND EQUIPMENT, page 341 

ISSUED REVISED GE Aviation Czech s.r.o. PAGE No. REVISION 

MONTH DAY YEAR MONTH DAY YEAR Beranovych 65 

199 02 Praha 9- Letnany 

Czech Republic 3 of 6 0 

12 23 2014 tel.: +420 222 538 111 

fax: +420 222 538 222 
4. APPENDICES 

Table 1 - List of serial numbers called Engines 

M601D-1 

I 851005 932003 

M601E-11 

I 034005 034006 034007 034008 041003 042002 

M601E-11A 

I 042003 I 042004 044001 044002 961001 

M601E-21 

I 914006 1 

M601E 

I 034004 041001 921011 

M601F 

I 024001 002001 003001 024001 934001 934002 

M601F-22 

I 941014 1 

M601F-32 

I 983007 1 

ISSUED REVISED GE Aviation Czech s.r.o. 

MONTH DAY YEAR MONTH DAY YEAR Beranovych 65 

199 02 Praha 9 - Letnany 

Czech Republ ic 

12 23 2014 tel.: +420 222 538 111 

fax: +420 222 538 222 

961001 

PAGE No. REVISION 

4 of 6 0 
M601T 

004001 004002 

914002 922001 

932003 941001 

941008 941009 942005 951002 991001 994001 

M601Z 

832016 844001 861002 861003 862004 862005 864001 864002 881001 881002 891001 891002 894003 894004 

904003 911001 

931001 932002 

ISSUED 

MONTH DAY YEAR 

12 23 2014 

004003 004004 022001 873003 

922002 923001 923002 932001 

941002 941003 941005 941006 

941010 942001 942002 942003 954001 954003 954004 984001 994002 994003 

851002 851003 851004 852006 861004 861005 862001 862002 

862006 862007 863001 863002 

864003 864004 871002 871004 

881003 881005 882001 882003 

891004 892002 892003 894001 

894005 901002 902001 903002 

911002 912001 912002 913001 

934002 

REVISED GE Aviation Czech s.r.o. 

MONTH DAY YEAR Beronovych 65 

199 02 Proho 9 - Letiiony 

Czech Republic 

tel.: +420 222 538 111 

fox: +420 222 538 222 

914001 932002 941007 942004 984002 

861001 862003 863004 871005 

882005 894002 

904001 913002 

PAGE No. REVISION 

5 of 6 0 
Approved by: 

..... .. ~ ................... . 

Steve Huck 

Chief Consulting Engineer 

Airworthiness & Certification and Flight Safety & Reliability 

ISSUED REVISED GE Aviation Czech s.r.o. 

MONTH DAY YEAR MONTH DAY YEAR Beranovych 65 

199 02 Proho 9- Letnony 

Czech Republ ic 

12 23 2014 tel.: +420 222 538 111 

fox: +420 222 538 222 

PAGE No. REVISION 

6 of 6 0