set forth on each page of this document shall appear in any such reproduction in whole or in 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 2012. 

M601 Engine Serial Numbers listed in Table 1. 

1.2. Compliance 

Replacement by authorized GEAC persons replacement of non-shot peened Gas Generator turbine 

(GGT) blades within 300 flight hours or 6 months whichever is shorter. 

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. 

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 

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 3 0 

12 23 2014 tel.: +420 222 538 111 

fax: +420 222 538 222 

GE PROPRIETARY INFORMATION: Subject to the restrictions on the cover page 
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 

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

2. ACCOMPLISHMENT INSTRUCTIONS 

1) Record the completion of the Service Bulletin in the Engine Log 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. 

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 Beronovych 65 

199 02 Praha 9 - Letnany 

Czech Republic 2 of 3 0 

12 23 2014 tel.: +420 222 538 111 

fax: +420 222 538 222 
I 873015 1 852079 1 

MGOlE-11 

I 862oo1 1 863008 1 894018 1 

M601T 

I 941004 1 942004 1 954002 1 

M601Z 

I 904002 1 911003 1 931002 1 894005 1 

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 Praha 9 - Letnony 

Czech Republic 12 23 2014 tel.: +420 222 538 111 

fox: +420 222 538 222 

PAGE No. 

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