ENTWICKLUNG GMBH
Airport Straubing-Wallmühle
94348 Atting / Germany
Telefon 49-(0)9429-9409-0
Telefax 49-(0)9429-8432
E-mail: sales@mt-propeller.com
ALERT SERVICE BULLETIN DOA No.
No. 30 R7 EASA.21J.020
Subject: Replacement of Blade Lag Screws of a certain production lot.
Affected Propeller: a: All new MTV-5-(), MTV-9-(), MTV-12-(), MTV-14-(),
MTV-15-(), MTV-16-(), MTV-18-(), MTV-27-()
manufactured from Nov 2013 until October 2014
with Lag Screw type A-983-C-85 are affected.
b: All overhauled or repaired propellers from Nov 2013 until end of
October 2014 with new installed lag screws during overhaul, as
applicable.
A production lot of lag screws with an improper surface finish was
manufactured and installed in the propellers with serial number listed on the
pages 2, 3 and 4.
Serial Numbers of Single blades which were manufactured or overhauled at
MT-Propeller or an MT-Propeller approved Service Center during this period
with the affected lag screws are listed on page 4.
Reason: In extreme applications with high loads single lag screws can fail.
Accomplishment: All propellers affected by this Service Bulletin which are inspected, tear down
inspected, repaired, or overhauled must have a lag screw replacement.
Action: All lag screws A-983-C-85 must be replaced after disassembly of the
propeller according to the procedures in the Composite Blade Overhaul
Manual E-1290. A record of the replaced lag screws must be sent to
techsupport@mt-propeller.com
Required Material: The lag screw A-983-D-85 or A-983-E-85 is available from MT-Propeller
Entwicklung GmbH Germany or MT-Propeller USA Inc in Florida.
The Overhaul manual E-1290 can be downloaded from
www.mt-propeller.com
Further information from techsupport@mt-propeller.com
This Service Bulletin has been approved according the procedures established for the EASA-certified Design Organization No.:
EASA.21J.020.
Prepared by CVE: Original Issue: Checked / Approved:
th Head of Office of Airworthiness
November 4 , 2014
Revision 7:
Tina Halbritter June 23, 2022 Martin Albrecht
Page 1 of 5
ENTWICKLUNG GMBH
Airport Straubing-Wallmühle
94348 Atting / Germany
Telefon 49-(0)9429-9409-0
Telefax 49-(0)9429-8432
E-mail: sales@mt-propeller.com
ALERT SERVICE BULLETIN DOA No.
No. 30 R7 EASA.21J.020
MTV-5 Series
04643 131131 131141 140185 140210 140390 140493 141011
130677 131138 140037 140194 140217 140391 140547
130994 131139 140038 140195 140227 140441 140738
130995 131140 140154 140209 140228 140460 140815
MTV-9 Series
98170 130983 131154 140237 140339 140636 140696
01098 130984 131155 140238 140383 140637 140697
03205 130985 131162 140265 140443 140661 140699
03522 130986 131164 140285 140458 140664 140700
04335 130989 131165 140286 140465 140665 140701
071169 131000 140004 140287 140482 140666 140703
100394 131003 140005 140288 140509 140669 140735
110578 131020 140069 140289 140510 140670 140737
130111 131021 140083 140321 140553 140682 140755
130795 131039 140088 140324 140556 140683 140807
130869 131062 140160 140327 140558 140685 140814
130953 131082 140164 140330 140583 140686 140887
130956 131086 140170 140332 140599 140687 140888
130957 131133 140174 140334 140625 140690 141029
130967 131135 140196 140335 140630 140692
130981 131153 140229 140338 140631 140695
MTV-9-K Series
130958 131101 131106 131111 131116 140248
131009 131102 131107 131112 131117 140438
131071 131103 131108 131113 131118 140706
131099 131104 131109 131114 131121
131100 131105 131110 131115 131122
Page 2 of 5
ENTWICKLUNG GMBH
Airport Straubing-Wallmühle
94348 Atting / Germany
Telefon 49-(0)9429-9409-0
Telefax 49-(0)9429-8432
E-mail: sales@mt-propeller.com
ALERT SERVICE BULLETIN DOA No.
No. 30 R7 EASA.21J.020
MTV-12 Series
96089 131043 140015 140235 140437 140725 141047
00355 131072 140016 140236 140446 140753
01030 131073 140092 140244 140455 140805
01403 131076 140133 140245 140456 140806
03651 131087 140163 140262 140501 140810
05333 131134 140165 140295 140506 140840
100619 131136 140166 140314 140522 140905
130914 131137 140183 140336 140531 140906
131008 131146 140186 140337 140574 140972
131022 140002 140233 140385 140607 140987
131023 140003 140234 140435 140608 141046
MTV-14 Series
90127 131028 140129 140378 140533 140646 141098
93239 131037 140130 140451 140545 140647 141181
00029 131080 140200 140452 140640 140649
04599 131147 140304 140499 140642 140878
080900 140006 140377 140532 140645 140879
MTV-15 Series
110536 131057 140011 140104 140219 140411
130980 131061 140033 140105 140279 140650
131041 131079 140034 140106 140280 140651
131045 131132 140035 140148 140281 140653
131049 140009 140089 140169 140316 140851
131055 140010 140103 140187 140392
MTV-16 Series
080308 130670
MTV-18 Series
140444 140620
Page 3 of 5
ENTWICKLUNG GMBH
Airport Straubing-Wallmühle
94348 Atting / Germany
Telefon 49-(0)9429-9409-0
Telefax 49-(0)9429-8432
E-mail: sales@mt-propeller.com
ALERT SERVICE BULLETIN DOA No.
No. 30 R7 EASA.21J.020
MTV-27 Series
110571 131012 140065 140231 140333 140528 141023
130747 131013 140085 140263 140384 140544 141099
130807 131048 140091 140264 140483 140823
131001 131059 140151 140301 140525 140885
131002 131060 140201 140322 140526 140886
131005 131077 140203 140323 140527 140957
Single Blade Types
170-57 195-30b AFB-52261 AFG-54221 AFG-54058 AFA-51914
AFB-52170 AFB-52327 AFD-52924 AFG-54222 CFRL250-55b AFA-51992
AFB-52171 AFB-52328 AFD-52925 AFG-54223 AFC-52613 AFA-51993
AFB-52172 AFB-52329 AFD-52926 AFG-54224 AFC-52614 AFA-51994
180-17c AFB-52330 CF183-59b AFG-54225 AFC-52615 AFA-51995
MI-6468 200-52 AFG-54100 AFG-54226 AFC-52616 AFA-51996
MI-6469 AFH-54493 AFG-54101 AFG-54227 AFC-52617
MI-6470 AFH-54494 AFG-54102 AFG-54228 AFD-53135
183-50a AFH-54495 CFLD168-101b AFG-54229 AFD-53136
AEJ-51158 205-58 AFD-52864 CFR225-55f AFD-53137
AEJ-51159 AAH-38361 AFD-52865 AFG-54173 AFD-53138
AEJ-51160 AEJ-51049 AFD-52866 AFG-54174 AFD-53139
183-59b AFD-53045 CFR-208-56 AFG-54175 CL250-55
YL-33187 210-58 AFD-52936 AFG-54176 AFD-52918
YL-33188 AFB-52442 AFD-52937 AFG-54177 AFD-52919
YL-33189 AFB-52443 AFD-52938 CFR250-103 AFD-52920
188-302 AFE-53403 AFD-52939 AFB-52377 CRLD199-117
AEI-50663 AFE-53404 AFD-52940 AFB-52378 AFA-51905
AEI-50664 215-136 CFR210-56 AFB-52379 AFA-51906
AEI-50665 AEJ-51047 AFG-54188 AFB-52380 AFA-51907
188-53 AEJ-51048 AFG-54189 AFB-52381 AFA-51908
AFE-53474 C183-17(e) AFG-54190 CFRL250-103 AFA-51909
AFE-53475 AEJ-51025-A AFG-54191 AFG-54054 AFA-51910
AFE-53476 AEJ-51026-A AFG-54192 AFG-54055 AFA-51911
AEJ-51027-A CFR210-58d AFG-54056 AFA-51912
C200-15 AFB-52321 AFG-54057 AFA-51913
Page 4 of 5
ENTWICKLUNG GMBH
Airport Straubing-Wallmühle
94348 Atting / Germany
Telefon 49-(0)9429-9409-0
Telefax 49-(0)9429-8432
E-mail: sales@mt-propeller.com
ALERT SERVICE BULLETIN DOA No.
No. 30 R7 EASA.21J.020
Service Bulletin 30
Compliance / Claim Form
Owner Information:
*Name:
*Address:
*Phone/Fax Number:
*E-mail Address:
Propeller Service Facility (Shipping Location):
*Name of Repair Facility:
*Address:
*Contact Person:
*Phone/Fax Number:
*Propeller Type:
*Propeller Serial Number:
*Blade Serial Number:
*TSN / TSO
Send this Order Form to: techsupport@mt-propeller.com
MT Propeller use only – do not write below this line
Warranty # : Approved by:
Page 5 of 5
