# Austro Engine Mandatory Service Bulletin MSB-E4-039/3: Revision 3

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- Document: [Austro Engine Mandatory Service Bulletin MSB-E4-039/3](https://openairdocs.org/service-documents/austro-engine/msb-e4-039-3.md)
- Title as filed: Austro Engine GmbH Mandatory Service Bulletin MSB-E4-0393 Rev 3
- Pages: 15
- PDF: https://openairdocs.org/files/sha256/31/14/3114145b3f28e6c0a6bf0d98c266af70aec46e445a33b9db76d0fc2de8e28e2c
- Page: https://openairdocs.org/service-documents/austro-engine/msb-e4-039-3/file/3114145b3f28

## Text

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### Page 1

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 1-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
Distribution: Portal 
Date: 29-Nov-2023 
1. Basic information 
1.1. Subject 
Oil Analysis and Pistons replacement 
1.2. Record of revisions 
Rev. Date Reason 
0 24.10.2022 Initial approval 
1 24.04.2023 
Clarifying notes added 
Labour effort further detailed 
Execution report removed – the MSB execution shall be confirmed 
only with the DAI partners portal 
2 26.07.2023 Applicability of the MSB (serial number lists) is revised 
3 22.11.2023 3.2 Labour effort amended 
 
Revised portions of this Mandatory Service Bulletin are marked highlighting the revised text in yellow

### Page 2

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 2-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
1.3. Definitions and Acronyms 
For the purpose of this Service Bulletin, the following definitions and acronyms apply: 
AD:    Airworthiness Directive 
Diamond partners portal: partners.diamondaircraft.com 
FH:     Flight Hours 
Flight Hours: Means the cumulative number of airborne hours in operation of 
each Engine computed from the time an aircraft leaves the ground 
until it touches the ground at the end of a flight 
GTC:    General Terms of Commerce 
MSB:    Mandatory Service Bulletin 
n/a:    Not applicable 
no.:    Number 
p/n or p/ns:    Part number or Part numbers 
PPM:    Parts per million 
SB:     Service Bulletin 
s/n or s/ns:    Serial number or Serial numbers 
TBO:    Time Between Overhaul 
Time Between Overhaul: Is the maximum number of Flight Hours that may be logged on an 
engine before the Maintenance Manual requires the product be 
removed for overhaul or replacement. For E4 and E4P engines the 
recommended Time Between Overhaul is 1800 FH. 
TSN:    Time Since New 
Time Since New:  Is the amount of Flight Hours elapsed since new 
Time Since Overhaul:  Is the amount of Flight Hours elapsed since the last engine overhaul 
Group 1 engines: Are model E4 engines in configuration “ -A”, installed on single 
engine aeroplanes, which are included in Table 1 
Group 2 engines: Are model E4 engines in configuration “ -B” or “ -C” and Model E4P 
installed on twin engine aeroplanes, which are included in Table 2 
Group 3 engines: Are model E4 engines in co nfiguration “ -A”, installed on single 
engine aeroplanes, which are included in Table 3 
Group 4 engines: Are model E4 engines in configuration “-B” or “-C” and Model E4P 
installed on twin engine aeroplanes, which are included in Table 4

### Page 3

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 3-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
1.4. Reason 
Occurrences were reported of piston failures. Subsequent investigation determined that certain 
batches of pistons were produced with a dimensional deviation in the piston pin bore and a 
dimensional deviation in the piston diameter. Depending on the magnitude of the dimensional 
discrepancy fatigue failure of the pistons is possible, leading to a potential oil loss and engine power 
loss. To correct this possible unsafe condition, this Service Bulletin requires the following to be 
accomplished as per the time provide in §1.6: 
- For group 1 and 2 engines, to take an oil sample and do an oil analysis up until TBO 
- For group 3 and 4 engines, to take an oil sample and do an oil analysis and at the specified 
time replace the pistons (inclusive of piston rings and con -rods assy), or replace the 
engine core 
1.5. Engines affected 
Engine affected: E4 Series 
Serial numbers affected: All E4/E4P engines listed in Table 1, Table 2, Table 3 and  
Table 4 
Table 1 - Affected Engine Serial Numbers, Group 1 
Group “1” Engines 
E4-A-06163 E4-A-06245 E4-A-06265 E4-A-06284 E4-A-06303 E4-A-06322 E4-A-06341 E4-A-06360 
E4-A-06222 E4-A-06246 E4-A-06266 E4-A-06285 E4-A-06304 E4-A-06323 E4-A-06342 E4-A-06361 
E4-A-06224 E4-A-06247 E4-A-06267 E4-A-06286 E4-A-06305 E4-A-06324 E4-A-06343 E4-A-06362 
E4-A-06228 E4-A-06249 E4-A-06268 E4-A-06287 E4-A-06306 E4-A-06325 E4-A-06344 E4-A-06363 
E4-A-06229 E4-A-06250 E4-A-06269 E4-A-06288 E4-A-06307 E4-A-06326 E4-A-06345 E4-A-06364 
E4-A-06230 E4-A-06251 E4-A-06270 E4-A-06289 E4-A-06308 E4-A-06327 E4-A-06346 E4-A-06365 
E4-A-06232 E4-A-06252 E4-A-06271 E4-A-06290 E4-A-06309 E4-A-06328 E4-A-06347 E4-A-06366 
E4-A-06233 E4-A-06253 E4-A-06272 E4-A-06291 E4-A-06310 E4-A-06329 E4-A-06348 E4-A-06369 
E4-A-06234 E4-A-06254 E4-A-06273 E4-A-06292 E4-A-06311 E4-A-06330 E4-A-06349 E4-A-06370 
E4-A-06235 E4-A-06255 E4-A-06274 E4-A-06293 E4-A-06312 E4-A-06331 E4-A-06350 E4-A-06371 
E4-A-06236 E4-A-06256 E4-A-06275 E4-A-06294 E4-A-06313 E4-A-06332 E4-A-06351 E4-A-06372 
E4-A-06237 E4-A-06257 E4-A-06276 E4-A-06295 E4-A-06314 E4-A-06333 E4-A-06352 E4-A-06374 
E4-A-06238 E4-A-06258 E4-A-06277 E4-A-06296 E4-A-06315 E4-A-06334 E4-A-06353 E4-A-06375 
E4-A-06239 E4-A-06259 E4-A-06278 E4-A-06297 E4-A-06316 E4-A-06335 E4-A-06354 E4-A-06376 
E4-A-06240 E4-A-06260 E4-A-06279 E4-A-06298 E4-A-06317 E4-A-06336 E4-A-06355 E4-A-06377 
E4-A-06241 E4-A-06261 E4-A-06280 E4-A-06299 E4-A-06318 E4-A-06337 E4-A-06356 E4-A-06380 
E4-A-06242 E4-A-06262 E4-A-06281 E4-A-06300 E4-A-06319 E4-A-06338 E4-A-06357 E4-A-06381 
E4-A-06243 E4-A-06263 E4-A-06282 E4-A-06301 E4-A-06320 E4-A-06339 E4-A-06358 E4-A-06382 
E4-A-06244 E4-A-06264 E4-A-06283 E4-A-06302 E4-A-06321 E4-A-06340 E4-A-06359 E4-A-06367 
 E4-A-06248 
Table 2 - Affected Engine Serial Numbers, Group 2 
Group “2” Engines 
E4-B-06030 E4-B-06034 E4-B-06038 E4-B-06042 E4-B-06046 E4-B-06051 E4-B-06055 
 E4-B-06031 E4-B-06035 E4-B-06039 E4-B-06043 E4-B-06047 E4-B-06052 E4-B-06056 E4-B-06032 E4-B-06036 E4-B-06040 E4-B-06044 E4-B-06048 E4-B-06053 E4-B-06057 
E4-B-06033 E4-B-06037 E4-B-06041 E4-B-06045 E4-B-06050 E4-B-06054 E4-B-06058 
 
E4-C-00038 E4-C-06189 E4-C-06207 E4-C-06221 E4-C-06235 E4-C-06250 E4-C-06264 E4-C-06278 
E4-C-00039 E4-C-06194 E4-C-06208 E4-C-06222 E4-C-06236 E4-C-06251 E4-C-06265 E4-C-06279 
E4-C-00059 E4-C-06195 E4-C-06209 E4-C-06223 E4-C-06237 E4-C-06252 E4-C-06266 E4-C-06280 
E4-C-00066 E4-C-06196 E4-C-06210 E4-C-06224 E4-C-06238 E4-C-06253 E4-C-06267 E4-C-06281 
E4-C-00212 E4-C-06197 E4-C-06211 E4-C-06225 E4-C-06239 E4-C-06254 E4-C-06268 E4-C-06282 
E4-C-00262 E4-C-06198 E4-C-06212 E4-C-06226 E4-C-06240 E4-C-06255 E4-C-06269 E4-C-06283 
E4-C-00267 E4-C-06199 E4-C-06213 E4-C-06227 E4-C-06241 E4-C-06256 E4-C-06270 E4-C-06284

### Page 4

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 4-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
Group “2” Engines 
E4-C-00275 E4-C-06200 E4-C-06214 E4-C-06228 E4-C-06242 E4-C-06257 E4-C-06271 E4-C-156W00021 
E4-C-00307 E4-C-06201 E4-C-06215 E4-C-06229 E4-C-06243 E4-C-06258 E4-C-06272 E4-C-156W00022 
E4-C-00311 E4-C-06202 E4-C-06216 E4-C-06230 E4-C-06244 E4-C-06259 E4-C-06273 E4-C-06249 
E4-C-00314 E4-C-06203 E4-C-06217 E4-C-06231 E4-C-06245 E4-C-06260 E4-C-06274 
 E4-C-00406 E4-C-06204 E4-C-06218 E4-C-06232 E4-C-06246 E4-C-06261 E4-C-06275 E4-C-00578 E4-C-06205 E4-C-06219 E4-C-06233 E4-C-06247 E4-C-06262 E4-C-06276 
E4-C-06186 E4-C-06206 E4-C-06220 E4-C-06234 E4-C-06248 E4-C-06263 E4-C-06277 
 
E4P-C-06122 E4P-C-06132 E4P-C-06141 E4P-C-06149 E4P-C-06157 E4P-C-06165 E4P-C-06173 E4P-C-06181 
E4P-C-06123 E4P-C-06133 E4P-C-06142 E4P-C-06150 E4P-C-06158 E4P-C-06166 E4P-C-06174 E4P-C-06182 
E4P-C-06126 E4P-C-06134 E4P-C-06143 E4P-C-06151 E4P-C-06159 E4P-C-06167 E4P-C-06175 E4P-C-06183 
E4P-C-06127 E4P-C-06135 E4P-C-06144 E4P-C-06152 E4P-C-06160 E4P-C-06168 E4P-C-06176 E4P-C-06184 
E4P-C-06128 E4P-C-06136 E4P-C-06145 E4P-C-06153 E4P-C-06161 E4P-C-06169 E4P-C-06177 E4P-C-06186 
E4P-C-06129 E4P-C-06137 E4P-C-06146 E4P-C-06154 E4P-C-06162 E4P-C-06170 E4P-C-06178 E4P-C-06187 
E4P-C-06130 E4P-C-06138 E4P-C-06147 E4P-C-06155 E4P-C-06163 E4P-C-06171 E4P-C-06179 E4P-C-06185 
E4P-C-06131 E4P-C-06139 E4P-C-06148 E4P-C-06156 E4P-C-06164 E4P-C-06172 E4P-C-06180  
Table 3 - Affected Engine Serial Numbers, Group 3  
Group “3” Engines 
E4-A-00011 E4-A-00240  E4-A-05057 E4-A-06025 E4-A-06076 E4-A-06127 E4-A-06179 
E4-A-00018 E4-A-00244 E4-A-00507 E4-A-05058 E4-A-06026 E4-A-06077 E4-A-06128 E4-A-06180 
E4-A-00019 E4-A-00249 E4-A-00508 E4-A-05059 E4-A-06027 E4-A-06078 E4-A-06129 E4-A-06181 
E4-A-00020 E4-A-00259 E4-A-00509 E4-A-05060 E4-A-06028 E4-A-06079 E4-A-06130 E4-A-06182 
E4-A-00026 E4-A-00263 E4-A-00513 E4-A-05061 E4-A-06029 E4-A-06080 E4-A-06131 E4-A-06183 
E4-A-00027 E4-A-00265 E4-A-00514 E4-A-05062 E4-A-06030 E4-A-06081 E4-A-06132 E4-A-06184 
E4-A-00028 E4-A-00266 E4-A-00515 E4-A-05063 E4-A-06031 E4-A-06082 E4-A-06133 E4-A-06185 
E4-A-00037 E4-A-00268 E4-A-00532 E4-A-05064 E4-A-06032 E4-A-06083 E4-A-06134 E4-A-06186 
E4-A-00038 E4-A-00269 E4-A-00533 E4-A-05065 E4-A-06033 E4-A-06084 E4-A-06135 E4-A-06187 
E4-A-00042 E4-A-00270 E4-A-00549 E4-A-05066 E4-A-06034 E4-A-06085 E4-A-06136 E4-A-06188 
E4-A-00046 E4-A-00274 E4-A-00567 E4-A-05067 E4-A-06035 E4-A-06086 E4-A-06137 E4-A-06189 
E4-A-00056 E4-A-00276 E4-A-00603 E4-A-05068 E4-A-06036 E4-A-06087 E4-A-06138 E4-A-06190 
E4-A-00066 E4-A-00278 E4-A-00604 E4-A-05069 E4-A-06037 E4-A-06088 E4-A-06139 E4-A-06191 
E4-A-00067 E4-A-00279 E4-A-00630 E4-A-05071 E4-A-06038 E4-A-06089 E4-A-06140 E4-A-06192 
E4-A-00073 E4-A-00280 E4-A-00647 E4-A-05073 E4-A-06039 E4-A-06090 E4-A-06141 E4-A-06193 
E4-A-00075 E4-A-00282 E4-A-00660 E4-A-05076 E4-A-06040 E4-A-06091 E4-A-06142 E4-A-06194 
E4-A-00076 E4-A-00284  E4-A-05077 E4-A-06041 E4-A-06092 E4-A-06143 E4-A-06195 
E4-A-00079 E4-A-00286  E4-A-05088 E4-A-06042 E4-A-06093 E4-A-06144 E4-A-06196 
E4-A-00100 E4-A-00299  E4-A-05089 E4-A-06043 E4-A-06094 E4-A-06145 E4-A-06197 
E4-A-00106 E4-A-00304  E4-A-05090 E4-A-06044 E4-A-06095 E4-A-06146 E4-A-06198 
E4-A-00107 E4-A-00323  E4-A-05091 E4-A-06045 E4-A-06096 E4-A-06147 E4-A-06199 
E4-A-00111 E4-A-00336  E4-A-05092 E4-A-06046 E4-A-06097 E4-A-06148 E4-A-06200 
E4-A-00115 E4-A-00340  E4-A-05093 E4-A-06047 E4-A-06098 E4-A-06149 E4-A-06201 
E4-A-00116 E4-A-00341  E4-A-05094 E4-A-06048 E4-A-06099 E4-A-06150 E4-A-06202 
E4-A-00131 E4-A-00350  E4-A-05095 E4-A-06049 E4-A-06100 E4-A-06151 E4-A-06203 
E4-A-00133 E4-A-00367  E4-A-05096 E4-A-06050 E4-A-06101 E4-A-06152 E4-A-06204 
E4-A-00138  E4-A-05031 E4-A-05097 E4-A-06051 E4-A-06102 E4-A-06153 E4-A-06205 
E4-A-00140 E4-A-00390  E4-A-06001 E4-A-06052 E4-A-06103 E4-A-06154 E4-A-06206 
E4-A-00142 E4-A-00394 E4-A-05033 E4-A-06002 E4-A-06053 E4-A-06104 E4-A-06155 E4-A-06207 
E4-A-00163 E4-A-00397 E4-A-05034 E4-A-06003 E4-A-06054 E4-A-06105 E4-A-06156 E4-A-06208 
E4-A-00165 E4-A-00400 E4-A-05035 E4-A-06004 E4-A-06055 E4-A-06106 E4-A-06157 E4-A-06209 
E4-A-00166 E4-A-00408 E4-A-05036 E4-A-06005 E4-A-06056 E4-A-06107 E4-A-06158 E4-A-06210 
E4-A-00168 E4-A-00420  E4-A-06006 E4-A-06057 E4-A-06108 E4-A-06159 E4-A-06211 
E4-A-00169 E4-A-00422 E4-A-05038 E4-A-06007 E4-A-06058 E4-A-06109 E4-A-06160 E4-A-06212 
E4-A-00192  E4-A-05040 E4-A-06010 E4-A-06062 E4-A-06114 E4-A-06167 E4-A-06219 
E4-A-00198 E4-A-00428 E4-A-05042 E4-A-06011 E4-A-06063 E4-A-06115 E4-A-06168 E4-A-06220 
E4-A-00200 E4-A-00429 E4-A-05043 E4-A-06012 E4-A-06064 E4-A-06116 E4-A-06169 E4-A-06221 
E4-A-00207  E4-A-05044 E4-A-06013 E4-A-06065 E4-A-06117 E4-A-06170 E4-A-06223

### Page 5

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 5-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
Group “3” Engines 
E4-A-00213 E4-A-00434 E4-A-05045 E4-A-06014 E4-A-06066 E4-A-06118 E4-A-06171 E4-A-06225 
E4-A-00214 E4-A-00441 E4-A-05046 E4-A-06015 E4-A-06067 E4-A-06119 E4-A-06172 E4-A-06226 
E4-A-00215 E4-A-00442 E4-A-05047 E4-A-06016 E4-A-06068 E4-A-06120 E4-A-06173 E4-A-06227 
 E4-A-00455 E4-A-05048 E4-A-06017 E4-A-06069 E4-A-06121 E4-A-06174 E4-A-06231 
E4-A-00219 E4-A-00456 E4-A-05049 E4-A-06018 E4-A-06070 E4-A-06122 E4-A-06175 E4-A-05072 
E4-A-00221 E4-A-00474 E4-A-05050 E4-A-06019 E4-A-06071 E4-A-06123 E4-A-06176 E4-A-05074 
E4-A-00223 E4-A-00475 E4-A-05051 E4-A-06020 E4-A-06072 E4-A-06124 E4-A-06177 E4-A-05075 
E4-A-00224 E4-A-00484 E4-A-05052 E4-A-06021 E4-A-06073 E4-A-06125 E4-A-06178 E4-A-05078 
E4-A-00227 E4-A-00485 E4-A-05053 E4-A-06022 E4-A-06074 E4-A-06126 E4-A-06213 E4-A-05079 
E4-A-00228 E4-A-00487 E4-A-05054 E4-A-06023 E4-A-06075 E4-A-06161 E4-A-06214 E4-A-05080 
E4-A-00232 E4-A-00491 E4-A-05055 E4-A-06024 E4-A-06110 E4-A-06162 E4-A-06215 E4-A-05081 
E4-A-00237 E4-A-00492 E4-A-05056 E4-A-06059 E4-A-06111 E4-A-06164 E4-A-06216 E4-A-05082 
E4-A-00239 E4-A-00498 E4-A-06008 E4-A-06060 E4-A-06112 E4-A-06165 E4-A-06217 E4-A-05083 
E4-A-00423  E4-A-06009 E4-A-06061 E4-A-06113 E4-A-06166 E4-A-06218 E4-A-05084 
 
E4-A-05085 
E4-A-05086 
E4-A-05087 
 
Table 4 - Affected Engine Serial Numbers, Group 4 
Group “4” Engines 
  E4-B-00147 E4-B-00231 E4-B-00488 E4-B-05008 E4-B-06007 E4-B-06018 
E4-B-00028  E4-B-00163 E4-B-00273 E4-B-00536 E4-B-05009 E4-B-06008 E4-B-06019 
E4-B-00031 E4-B-00099 E4-B-00164 E4-B-00282 E4-B-00540 E4-B-05010 E4-B-06009 E4-B-06020 
E4-B-00039 E4-B-00109  E4-B-00297 E4-B-00541 E4-B-05011 E4-B-06010 E4-B-06021 
E4-B-00049 E4-B-00110 E4-B-00173 E4-B-00379 E4-B-05001 E4-B-05012 E4-B-06011 E4-B-06022 
E4-B-00050 E4-B-00112 E4-B-00196 E4-B-00382 E4-B-05002 E4-B-06001 E4-B-06012 E4-B-06023 
E4-B-00059 E4-B-00131 E4-B-00202 E4-B-00383 E4-B-05003 E4-B-06002 E4-B-06013 E4-B-06024 
E4-B-00060 E4-B-00136 E4-B-00208 E4-B-00417 E4-B-05004 E4-B-06003 E4-B-06014 E4-B-06025 
E4-B-00061 E4-B-00140 E4-B-00209 E4-B-00433 E4-B-05005 E4-B-06004 E4-B-06015 E4-B-06027 
E4-B-00063 E4-B-00143 E4-B-00216 E4-B-00434 E4-B-05006 E4-B-06005 E4-B-06016 E4-B-06028 
E4-B-00065 E4-B-00145 E4-B-00225 E4-B-00487 E4-B-05007 E4-B-06006 E4-B-06017 E4-B-06029 
 
E4-C-00001 E4-C-00313 E4-C-05054 E4-C-05119 E4-C-06035 E4-C-06077 E4-C-06119 E4-C-06162 
E4-C-00004 E4-C-00344 E4-C-05055 E4-C-05120 E4-C-06036 E4-C-06078 E4-C-06120 E4-C-06163 
E4-C-00007 E4-C-00349 E4-C-05056 E4-C-05121 E4-C-06037 E4-C-06079 E4-C-06121 E4-C-06164 
E4-C-00008  E4-C-05057 E4-C-05122 E4-C-06038 E4-C-06080 E4-C-06122 E4-C-06165 
E4-C-00018 E4-C-00366 E4-C-05058 E4-C-05123 E4-C-06039 E4-C-06081 E4-C-06123 E4-C-06166 
E4-C-00041 E4-C-00378 E4-C-05059 E4-C-05124 E4-C-06040 E4-C-06082 E4-C-06124 E4-C-06167 
E4-C-00042 E4-C-00473 E4-C-05060 E4-C-05125 E4-C-06041 E4-C-06083 E4-C-06125 E4-C-06168 
E4-C-00060 E4-C-00480 E4-C-05061 E4-C-05126 E4-C-06042 E4-C-06084 E4-C-06126 E4-C-06169 
E4-C-00061 E4-C-00568 E4-C-05062 E4-C-06001 E4-C-06043 E4-C-06085 E4-C-06127 E4-C-06170 
E4-C-00069 E4-C-00569 E4-C-05063 E4-C-06002 E4-C-06044 E4-C-06086 E4-C-06128 E4-C-06171 
E4-C-00087 E4-C-00604 E4-C-05064 E4-C-06003 E4-C-06045 E4-C-06087 E4-C-06129 E4-C-06172 
E4-C-00088 E4-C-00622 E4-C-05065 E4-C-06004 E4-C-06046 E4-C-06088 E4-C-06130 E4-C-06173 
E4-C-00091 E4-C-00623 E4-C-05066 E4-C-06005 E4-C-06047 E4-C-06089 E4-C-06131 E4-C-06174 
E4-C-00092  E4-C-05067 E4-C-06006 E4-C-06048 E4-C-06090 E4-C-06132 E4-C-06175 
  E4-C-05068 E4-C-06007 E4-C-06049 E4-C-06091 E4-C-06133 E4-C-06176 
E4-C-00119  E4-C-05069 E4-C-06008 E4-C-06050 E4-C-06092 E4-C-06134 E4-C-06177 
E4-C-00122  E4-C-05070 E4-C-06009 E4-C-06051 E4-C-06093 E4-C-06135 E4-C-06178 
E4-C-00125  E4-C-05071 E4-C-06010 E4-C-06052 E4-C-06094 E4-C-06136 E4-C-06179 
E4-C-00138  E4-C-05072 E4-C-06011 E4-C-06053 E4-C-06095 E4-C-06137 E4-C-06180 
E4-C-00171  E4-C-05073 E4-C-06012 E4-C-06054 E4-C-06096 E4-C-06138 E4-C-06181 
E4-C-00172  E4-C-05074 E4-C-06013 E4-C-06055 E4-C-06097 E4-C-06139 E4-C-06182 
E4-C-00182  E4-C-05075 E4-C-06014 E4-C-06056 E4-C-06098 E4-C-06140 E4-C-06183 
  E4-C-05076 E4-C-06015 E4-C-06057 E4-C-06099 E4-C-06141 E4-C-06184

### Page 6

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 6-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
Group “4” Engines 
E4-C-00199  E4-C-05077 E4-C-06016 E4-C-06058 E4-C-06100 E4-C-06142 E4-C-06185 
E4-C-00200  E4-C-05078 E4-C-06017 E4-C-06059 E4-C-06101 E4-C-06143 E4-C-06187 
E4-C-00201  E4-C-05079 E4-C-06018 E4-C-06060 E4-C-06102 E4-C-06144 E4-C-06188 
E4-C-00210  E4-C-05080 E4-C-06019 E4-C-06061 E4-C-06103 E4-C-06145 E4-C-06190 
E4-C-00218  E4-C-05081 E4-C-06020 E4-C-06062 E4-C-06104 E4-C-06146 E4-C-06191 
E4-C-00227  E4-C-05082 E4-C-06021 E4-C-06063 E4-C-06105 E4-C-06148 E4-C-06192 
E4-C-00233 E4-C-05041 E4-C-05083 E4-C-06022 E4-C-06064 E4-C-06106 E4-C-06149 E4-C-06193 
E4-C-00230 E4-C-05042 E4-C-05084 E4-C-06023 E4-C-06065 E4-C-06107 E4-C-06150 E4-C-156W00010 
E4-C-00243  E4-C-05085 E4-C-06024 E4-C-06066 E4-C-06108 E4-C-06151 E4-C-156W00012 
E4-C-00248  E4-C-05086 E4-C-06025 E4-C-06067 E4-C-06109 E4-C-06152 E4-C-156W00011 
E4-C-00263 E4-C-05045 E4-C-05087 E4-C-06026 E4-C-06068 E4-C-06110 E4-C-06153 E4-C-156W00009 
E4-C-00266 E4-C-05046 E4-C-05088 E4-C-06027 E4-C-06069 E4-C-06111 E4-C-06154 E4-C-156W00013 
 E4-C-05047 E4-C-05095 E4-C-06028 E4-C-06070 E4-C-06112 E4-C-06155 E4-C-156W00016 
E4-C-00274 E4-C-05048 E4-C-05097 E4-C-06029 E4-C-06071 E4-C-06113 E4-C-06156 E4-C-156W00015 
E4-C-00279 E4-C-05049 E4-C-05112 E4-C-06030 E4-C-06072 E4-C-06114 E4-C-06157 E4-C-156W00017 
E4-C-00282 E4-C-05050 E4-C-05113 E4-C-06031 E4-C-06073 E4-C-06115 E4-C-06158 E4-C-156W00019 
E4-C-00301  E4-C-05114 E4-C-06032 E4-C-06074 E4-C-06116 E4-C-06159 E4-C-156W00018 
E4-C-00309 E4-C-05052 E4-C-05115 E4-C-06033 E4-C-06075 E4-C-06117 E4-C-06160 E4-C-156W00020 
E4-C-00312 E4-C-05053 E4-C-05118 E4-C-06034 E4-C-06076 E4-C-06118 E4-C-06161 E4-C-156W00014 
E4-C-00559 E4-C-05091 E4-C-05094 E4-C-05099 E4-C-05102 E4-C-05105 E4-C-05108 E4-C-05111 
E4-C-05089 E4-C-05092 E4-C-05096 E4-C-05100 E4-C-05103 E4-C-05106 E4-C-05109  
E4-C-05090 E4-C-05093 E4-C-05098 E4-C-05101 E4-C-05104 E4-C-05107 E4-C-05110  
 
E4P-B-05001 E4P-B-05002 E4P-B-05003 E4P-B-05004  
 
E4P-C-00020 E4P-C-05014 E4P-C-06019 E4P-C-06038 E4P-C-06057 E4P-C-06077 E4P-C-06096 E4P-C-06115 
E4P-C-00023 E4P-C-06001 E4P-C-06020 E4P-C-06039 E4P-C-06058 E4P-C-06078 E4P-C-06097 E4P-C-06116 
E4P-C-00051 E4P-C-06002 E4P-C-06021 E4P-C-06040 E4P-C-06059 E4P-C-06079 E4P-C-06098 E4P-C-06117 
E4P-C-00066 E4P-C-06003 E4P-C-06022 E4P-C-06041 E4P-C-06060 E4P-C-06080 E4P-C-06099 E4P-C-06118 
E4P-C-00069 E4P-C-06004 E4P-C-06023 E4P-C-06042 E4P-C-06061 E4P-C-06081 E4P-C-06100 E4P-C-06119 
E4P-C-00224 E4P-C-06005 E4P-C-06024 E4P-C-06043 E4P-C-06062 E4P-C-06082 E4P-C-06101 E4P-C-06120 
E4P-C-05001 E4P-C-06006 E4P-C-06025 E4P-C-06044 E4P-C-06063 E4P-C-06083 E4P-C-06102 E4P-C-06121 
E4P-C-05002 E4P-C-06007 E4P-C-06026 E4P-C-06045 E4P-C-06064 E4P-C-06084 E4P-C-06103 E4P-C-06124 
E4P-C-05003 E4P-C-06008 E4P-C-06027 E4P-C-06046 E4P-C-06065 E4P-C-06085 E4P-C-06104 E4P-C-06125 
E4P-C-05004 E4P-C-06009 E4P-C-06028 E4P-C-06047 E4P-C-06066 E4P-C-06086 E4P-C-06105 E4P-C-99213 
E4P-C-05005 E4P-C-06010 E4P-C-06029 E4P-C-06048 E4P-C-06067 E4P-C-06087 E4P-C-06106 E4P-C-06073 
E4P-C-05006 E4P-C-06011 E4P-C-06030 E4P-C-06049 E4P-C-06068 E4P-C-06088 E4P-C-06107 
 
E4P-C-05007 E4P-C-06012 E4P-C-06031 E4P-C-06050 E4P-C-06069 E4P-C-06089 E4P-C-06108 
E4P-C-05008 E4P-C-06013 E4P-C-06032 E4P-C-06051 E4P-C-06070 E4P-C-06090 E4P-C-06109 
E4P-C-05009 E4P-C-06014 E4P-C-06033 E4P-C-06052 E4P-C-06071 E4P-C-06091 E4P-C-06110 
E4P-C-05010 E4P-C-06015 E4P-C-06034 E4P-C-06053 E4P-C-06072 E4P-C-06092 E4P-C-06111 
E4P-C-05011 E4P-C-06016 E4P-C-06035 E4P-C-06054 E4P-C-06074 E4P-C-06093 E4P-C-06112 
E4P-C-05012 E4P-C-06017 E4P-C-06036 E4P-C-06055 E4P-C-06075 E4P-C-06094 E4P-C-06113 
E4P-C-05013 E4P-C-06018 E4P-C-06037 E4P-C-06056 E4P-C-06076 E4P-C-06095 E4P-C-06114

### Page 7

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 7-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
1.6. Required Actions and Time of Compliance 
GROUP “1” ENGINES 
ALL the engine s/n 
listed in Table 1 Do an Engine Oil Analysis(2) 
Within the next 15 FH or with the next 
scheduled maintenance action, whichever 
occurs first 
THEN 
Every 50 FH up to the engine TBO 
 
GROUP “2” ENGINES 
ALL the engine s/n 
listed in Table 2 Do an Engine Oil Analysis(2) 
Within the next 25 FH or with the next 
scheduled maintenance action, whichever 
occurs first 
THEN 
Every 100 FH up to the engine TBO 
 
GROUP “3” ENGINES 
ALL the engines s/n 
listed in Table 3 
with 
0 FH to 900 FH 
Do an Engine Oil Analysis(2) 
 
AND 
 
Within the next 15 FH or with the next 
scheduled maintenance action, whichever 
occurs first 
THEN 
Every 50 FH up to 900FH 
Replace the Pistons, the Piston rings 
and the Con-rods assy(1) 
OR 
Replace the engine core 
At 900 FH 
ALL the engines s/n 
listed in Table 3 
 above 900 FH 
Replace the Pistons, the Piston rings 
and the Con-rods assy(1) 
OR 
Replace the engine core 
Within the next 15 FH or with the next 
scheduled maintenance action, whichever 
occurs first 
 
GROUP “4” ENGINES 
ALL the engines s/n 
listed in  
Table 4 with 
0 FH to 1000 FH 
Do an Engine Oil Analysis(2) 
 
AND 
 
Within the next 25 FH or with the next 
scheduled maintenance action, whichever 
occurs first 
THEN 
Every 100 FH up to 1000FH 
Replace the Pistons, the Piston rings 
and the Con-rods assy(1) 
OR 
Replace the engine core 
At 1000 FH 
ALL the engines s/n 
listed in  
Table 4 above 1000 
FH 
Replace the Pistons, the Piston rings 
and the Con-rods assy(1) 
OR 
Replace the engine core 
Within the next 25 FH or with the next 
scheduled maintenance action, whichever 
occurs first 
  
 (1): 
Pistons replacement: 
The Pistons, piston rings and con-rods replacement can be accomplished by (or under written 
authorization of) Austro Engine GmbH.

### Page 8

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 8-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
Release to service: 
 (2): 
For Group 1 and 3 engines having accumulated 0 to 14FH TSN where the first oil sample is 
taken, the airplane can be released to service for the residual amount of FH of the required 
time of compliance (e.g. Oil sample taken at 5FH, release to service for 10FH while waiting for 
oil analysis results). 
 
For Group 2 and 4 engines having accumulated 0 to 24FH TSN where the first oil sample is 
taken, the airplane can be released to service for the residual amount of FH of the require d 
time of compliance (e.g. Oil sample taken at 10FH, release to service for 1 5FH while waiting 
for oil analysis results). 
 
For Group 1 and 3 engines having accumulated more than 14FH TSN where the first oil sample 
is taken , the airplane can be released to service only after the receival of the oil analysis 
results; 
 
For Group 2 and 4 engines having accumulated more than 24FH TSN where the first oil sample 
is taken, the airplane can be released to service only after the receival of the oil analysis results 
 
For the recurrent oil analysis taken every 50FH or 100FH as applicable, the airplane can be 
released to service: 
• Group 1 and 3: for 50FH, while waiting for the oil analysis results 
• Group 2 and 4: for 100FH, while waiting for the oil analysis results 
Time of compliance for Engines where an Overhaul was accomplished:  
  
The FH specified in §1.6 of this MSB are those accumulated by the engine since first installation 
on an aeroplane, or since last overhaul: 
e.g. For an engine of group 3 which was overhauled at 1800FH, the required replacement 
actions must be accomplished at 2700FH (900FH since overhaul) 
e.g. For an engine of group 4 which was overhauled at 1800FH, the required replacement 
actions must be accomplished at 2800FH (1000FH since overhaul) 
Authorised release certificate – EASA Form 1 of the replacement parts 
  
Before installing a replacement part(s) carefully read the authorised release certificate – EASA 
Form 1. The block “Remarks” is used to address limitation(s), if any.

### Page 9

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 9-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
1.7. Concurrent documents / references 
  Note: If not specified, the latest revision of the referenced documents applies. 
• Work instruction WI-MSB-E4-039 
• Service Instruction SI-E4-013 “Oil sampling” 
1.8. Other publications affected 
None 
1.9. Credits 
Group 1 and 3 engines: 
Engines that have had an oil analysis performed at the last scheduled maintenance (e.g.  100FH 
maintenance) and have accumulated less than 50FH from that oil analysis will meet the requirements 
of the first oil analysis to be performed within 15FH, provided the aluminium value is within the value 
shown in Table 5. (These engines do not need to take the first oil sample). 
 
Group 2 and 4 engines: 
Engines that have had an oil analysis performed at the last scheduled maintenance (e.g. 100FH 
maintenance) will meet the requirements of the first oil analysis to be performed within 25FH, 
provided the aluminium value is within the value stated in Table 5. (These engines do not need to 
take the first oil sample). 
 
MSB-E4-039 rev. 0 to rev. 2: 
Prior compliance with MSB-E4-039 rev.0 to MSB-E4-039 rev.2 is considered as compliance with this 
MSB.

### Page 10

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 10-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
2. Technical Details 
 
Engine Oil Analysis 
• Start and warm up the engine 
• Once the oil temperature is in green arc, shutdown the engine 
• Take an oil sample: 
o Put a clean container under the oil quick-drain valve (lower side of the oil sump) 
o Open the oil quick drain valve 
o Collect ~100ml of oil 
o Close the oil quick drain valve 
• Do an oil analysis according to ASTM D5185 standard 
• Send the oil analysis results to Austro Engine via the Diamond Partner Portal 
 
NOTE: Do not use emails to provide the oil analysis results to Austro Engine 
 
• Compare the aluminium contents with the allowable provided in Table 5 
 
Table 5 - Oil check analysis - Aluminium PPM allowable 
Aluminium ≤ 8PPM 
WARNING 
If Aluminium contents is higher than the indicated values, replace the 
pistons, the piston rings, the con-rods assy and the crankcase or replace the 
engine core 
NOTE: 
Austro Engine recommends following the SI -E4-013 “Oil Sampling”  and 
providing the e-mail to which the analysis results can be sent. 
In case Spectro or OelCheck laboratories are used, the laboratory approved 
container to take the oil sample should be used. 
NOTE: 
Once the engine core (or the pistons, the piston rings, the con-rods assy and 
the crankcase as applicable) is (are) replaced, no further oil analysis 
according to this MSB are required 
 
Engine core replacement 
• Perform the replacement of the engine core in accordance with the instruction provided in 
the work instruction no. WI-MSB-E4-039-I 
 
NOTE: The engine type plate must be removed from the uninstalled engine core and reinstalled on the new engine core. Instructions are provided in the WI-MSB-E4-039-I 
 
• Mark the service bulletin as executed on the Diamond partners portal 
• Send the removed parts back to Austro Engine according to the WI-MSB-E4-039-I.

### Page 11

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 11-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
Pistons, piston rings and con-rod assy replacement 
• Perform the replacement of the pistons, the piston rings, and the con-rod assy in accordance 
with the instruction provided in the work instruction no. WI-MSB-E4-039-II 
• Mark the service bulletin as executed on the Diamond partners portal 
• Send the removed parts back to Austro Engine according to the WI-MSB-E4-039-II. 
 
Pistons, piston rings, crankcase and con-rod assy replacement 
• Perform the replacement of the pistons, the piston rings, the con-rod assy and the crankcase 
in accordance with the instruction provided in the work instruction no. WI-MSB-E4-039-II 
• Mark the service bulletin as executed on the Diamond partners portal 
• Send the removed parts back to Austro Engine according to the WI-MSB-E4-039-II.

### Page 12

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 12-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
2.1. Illustrations 
None 
2.2. Mass (weight) 
Not affected 
2.3. Approval statement 
The technical content of this document is approved under the authority of the DOA ref. EASA. 
21J.399. 
3. Planning Information 
3.1. Material & Special tools 
The list of materials and special tools is provided in the WI-MSB-E4-039, latest applicable revision. 
 
3.2. Labour effort 
35 hours for Engine Core replacement according to WI-MSB-E4-039-I 
65 hours for Pistons, Piston Rings and Con-rods replacement according to WI-MSB-E4-039-II (1) 
1 hour per MSB Recurrent Oil sampling related labour (2) 
 
 (1): 
Step 1 (Service Center): 15 HOURS for execution of step 2.2.1. Remove the engine from the aircraft  
Step 2 (Engine Repair Station): 35 HOURS for execution of steps 2.2.2. through 2.5.15. of Work 
Instruction WI-MSB-E4-039-II 
Step 3 (Service Center): 20 HOURS for execution of step 2.2.16. Install the engine on the aircraft 
including release to service 
 (2): Claim quarterly, scheduled maintenance oil sampling is excluded 
 
3.3. Engine preservation 
In the case an engine or any engine core should be stored, proceed in accordance with the Engine 
Maintenance Manual for its preservation to maintain its airworthiness conditions. 
4. Warranty 
Costs for labour and parts related to the applicability of this MSB will be covere d by Austro Engine 
GmbH warranty under the limitations outlined in paragraph 3.2 and within the currently valid GTC. 
Additional fees for oil samples required by this MSB will be covered by Austro Engine GmbH warranty 
under its currently valid GTC only for oil analysis performed at Spectro or Oelcheck laboratories. 
For engine units affected by this MSB and approaching end TBO/TBR deadline pro-rate solutions will 
be offered on a case to case basis.  
Diamond and Austro Engine GmbH GTCs are available at https://www.diamondaircraft.com/en/GTC

### Page 13

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 13-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
5. Remarks 
 
 NOTE: 
 
o All measures must be carried out by a certified engine station and certified engine 
mechanics 
o The accomplishment of the instructions shown under chapter 2 must be confirmed 
in the respective engine logbook 
o The accomplishment of the instructions must be carried out within the time of 
compliance according to chapter 1.6 
o In case of doubt, please contact Austro Engine GmbH via the Diamond Partner Portal 
o If you are not a Diamond Partner / Service Centre, please contact a Diamond/Austro 
Engine Authorized Service Centre near you. 
 
6. Explanatory notes 
6.1. Symbol explanation 
 
WARNING: Disregarding these safety rules can cause personal injury or even death 
 
CAUTION: Disregarding these special instructions and safety measures can cause damage to the engine or other components 
 
NOTE: Additional note or instruction for better understanding of an instruction

### Page 14

DOA no. EASA.21J.399 
Mandatory Service Bulletin 
No. MSB-E4-039/3 
Austro Engine GmbH 
Rudolf-Diesel-Strasse 11 
A-2700 Wiener Neustadt 
Tel: +43 2622 23000 
 
First Issue Date  Rev. No. Revision Date   Page 
24 10 2022 3 22 11 2023 14-15 
© 2023 by Austro Engine GmbH – AUSTRIA – www.austroengine.at 
7. Appendix I 
INTENTIONALLY LEFT IN BLANK

### Page 15 (OCR)

Austro Engine  DOA no. EASA.21J.399  Mandatory Service Bulletin  No. MSB-E4-039/3  Tel: +43 2622 23000  Rudolf-Diesel-Strasse 11  Austro Engine GmbH  A-2700 Wiener Neustadt
8. Appendix II - Process summary flowchart
The engine is installed
on a single engine
airplane (e.g. DA40)
Is the engine in  Continue performing the
listed in Table 1)  group 1? (s/n  Perform an oil analysis  within the next 15FH  • oil analysis every 50FH up  to the engine TBO/TBR  → End
Is the engine in  group 3? (s/n  have above 900FH?  Does the engine  Perform an oil analysis  within the next 15FH  oil analysis every 50FH up  Continue performing the
listed in Table 3)  to 900FH
Replace the core engine
-Yes -  (or the piston/rings
/conrods)
THE ENGINE IS NOT
AFFECTED
-- END --
The engine is installed
on a twin engine
airplane (e.g. DA42)
Is the engine in  Continue performing the
group 2? (s/n  Pertorm an oil analysis  within the next 25FH  oil analysis every 100FH  End
listed in Table 2)  up to the engine TBO/TBR
Is the engine in  group 4? (s/n  Does the engine  Perform an oil analysis  Continue performing the  oil analysis every 100FH
listed in Table 4)  have above 1000FH?  within the next 25FH  up to 1000FH
Replace the core engine
-Yes  (or the piston/rings
/conrods)
THE ENGINE IS NOT
AFFECTED
- END --
First Issue Date  Rev. No.  Revision Date  Page
24  10  2022  22  11  2023  15-15
© 2023 by Austro Engine GmbH - AUSTRIA - www.austroengine.at

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