Service Bulletins (Airworthiness Directives) for Yak-18T
YAKOVLEV Yak-18T · Service Bulletins
Overview
This document contains a series of service bulletins for the Yakovlev Yak-18T aircraft, detailing various maintenance and modification tasks. Each bulletin specifies the issue date, content, applicability, and the organization responsible for performing the work.
- Includes multiple service bulletins for the Yak-18T.
- Covers repairs, replacements, and modifications.
- Applicable to specific serial numbers of the aircraft.
- Performed by overhaul factories or maintenance organizations.
- Some bulletins clarify manuals or extend life of components.
- Bulletins include both mandatory and informational updates.
- Dates range from 1975 to 1982.
- Focus on safety and performance enhancements.
Document
Source
Originally published by aero-concept.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Bulletins
- Year ·
- 1975
- File size ·
- 517 KB
- Publisher ·
- aero-concept.com
- Language ·
- en
What is the Service Bulletins (Airworthiness Directives) for Yak-18T?
The Service Bulletins (Airworthiness Directives) for Yak-18T is a service bulletins for the YAKOVLEV Yak-18T, dated 1975.
Where does the Service Bulletins (Airworthiness Directives) for Yak-18T come from?
This copy of the Service Bulletins (Airworthiness Directives) for Yak-18T was originally published by aero-concept.com and is hosted on Sprinkle as a free, searchable reference copy.
What year was the Service Bulletins (Airworthiness Directives) for Yak-18T published?
The Service Bulletins (Airworthiness Directives) for Yak-18T — the YAKOVLEV Yak-18T service bulletins on file — is dated 1975.
Most owners only have the POH. Here's the essential set for the YAKOVLEV Yak-18T.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
More YAKOVLEV Yak-18Tmanuals & documents
Related documents
- YAK-52 SERVICE BULLETINSYAKOVLEV YAK 52 · Service Bulletins
- Service BulletinsGROB G-115 · Service Bulletins
- KAWASAKI SERVICE BULLETIN INDEX BK117KAWASAKI BK117 · Service Bulletins
- Airworthiness Directive Schedule Aeroplanes Mooney M20 SeriesMooney M20R Ovation · Service Bulletins
- Cessna Aircraft Company Model 182/T182 Maintenance ManualCessna 182 Skylane · Maintenance Manual
In this document
Bulletin No. 1E
Issued on 08.01.75, it addresses the repair of the 'Varly' battery body.
Bulletin No. 001-DM
Dated 31.10.75, it involves the replacement of the SBSE-77 fuel meter with the SBES2077E fuel meter.
Bulletin No. 002-DK
Issued on 29.05.75, it details the replacement of the engine mount ring.
Bulletin No. 005-E
Clarification of manuals issued on 09.07.75.
Bulletin No. 021-DK
Dated 29.03.77, it involves the replacement of the trim tab and installation of additional balance weight on the elevator.
Bulletin No. 088-E
Issued on 14.06.79, it discusses the landing gear life time extension.
Safety notes
- Perform all modifications as specified in the bulletins.
- Ensure compliance with the applicable serial numbers.
- Follow the recommended maintenance organization for specific tasks.
- Monitor for any cracks in reinforced areas as noted in bulletins.
- Use specified replacement parts to maintain airworthiness.
Full document text
Service Bulletins (Airworthiness Directives) for Yak-18T Bulletin No. Date of issue Contents Applicability, S/N Performed by Performing term 1E 08.01.75 "Varly" battery body repair Overhaul factory MOH 001-DM 31.10.75 Replacement of the SBSE-77 fuel meter with the SBES2077E fuel meter 0601-0504 Overhaul factory MOH 002-DK 29.05.75 Replacement of the engine mount ring for the reinforced one 0601-2007 Overhaul factory MOH 003-DK 29.05.75 Replacement of the 4211-93 linkage in the 4211-90 damper 0601-0907 Aircraft manufacturer/ Overhaul factory MOH 004-R 29.05.75 Replacement of undercarriage shock absorber pistons No.4111-14 and No.4211-18. 0601-0306 Overhaul factory MOH 005-E 09.07.75 Manuals clarification 0101-1008 Maintenance organization 1975 006-DK 06.06.75 Replacement of landing gear uplock springs No.4115 and No.4215 0601-0906 Aircraft manufacturer MOH 007-DM 11.06.75 Replacement of the M-14 engine with the M-14P 0601-0204 Maintenance organization MOH 008-DK 19.05.76 Fire shut-off valves sealing 0601-0106 Maintenance organization If necessary 009-DK 29.07.76 Replacement of the edge former No.1014-07 on the wall of the rib No.4 in the wing center section 0601-2008 Overhaul factory MOH 010-DK 13.09.76 Installation of the oil cooler winterization blank No.6205-30A 0601-2008 Aircraft manufacturer 30.09.1977 012-DK 23.03.76 Reinforcement of the front spar wing attachment point 0601-1008 Overhaul factory MOH 014-E 29.09.76 Manuals clarification 0101-0110 Maintenance organization 31.01.1977 015-DK 29.04.77 1. Pitot attachment reinforcement 2. Replacement 7703-01 0601-0814 0601-0814 Overhaul factory MOH 016-DK 13.07.76 Replacement of throttle lever attachment and friction unit 0601-2007 Overhaul factory MOH 017-DK 23.11.76 Holes in the carburetor inlet choke 0601-0610 Aircraft manufacturer MOH 021-DK 29.03.77 Replacement of the trim tab and installation of additional balance weight on the elevator 0601-0812 Overhaul factory MOH 022-DK 06.04.77 Replacement of the governor stop- screws bracket with the reinforced one 0601-2014 Overhaul factory MOH 024-DK 06.04.77 Replacement of the collective tank drain valve No.6100-170 for the drain valve No.600500A 0601-1807 Overhaul factory MOH 025-DK 29.04.77 Stabilizer reinforcement within the brace attachment area 0601-2013, 0401 Overhaul factory MOH 026-DK 05.03.77 Fire wall reinforcement within the area of PK-45 attachment 0101, 0401, 0601-2012 Overhaul factory MOH 027-DK 05.03.77 1. Enlargement of the aileron skin cutout 2. Installation of the additional access door in the cockpit floor 0101, 0401, 0601-2013 0601-2014 Overhaul factory MOH 028-DK 06.05.77 1. Installation of the plate on the wing center section leading edge 2. Replacement of three SP-1 AC circuit breakers with SP-2B AC circuit breakers 0101-2014 0101-0313 Overhaul factory 30.12.77 029-DK 19.01.77 Landing gear inspection 0601-0807 Aircraft manufacturer 28.02.77 030-DK 26.05.77 Replacement of control surfaces attachment units with removable studs 0101-2014 Overhaul factory MOH 031-DK 25.03.77 Replacement of the oil cooler thermovalve with the reducing valve 0101-1212 Overhaul factory MOH 032-DK 29.04.77 Wing center section reinforcement (13 different modifications) Refer to SB Overhaul factory MOH 033-DK 29.04.77 Replacement of the emergency air bottle supporting cup 0601-2013 Overhaul factory MOH 034-DK 27.06.77 1. Fuselage modification for the installation of 7512-0 fans 2. Reinforcement of gills lip attachment 3. Reinforcement of gills vanes attachment points 0101-2010 0101-2009 0101-2013 Overhaul factory MOH 035-DK 26.05.77 1. Improving AM-800K landing gear micro switch reliability 2. Replacement of gills control arm with the reinforced one 3. Improving of brake cable terminations 4. Adjusting air system reducing valve 0101, 0401, 0601-1009 0101, 0401, 0601-2015 0101, 0401, 0601-2010 0101, 0401, 0601-21921 Overhaul factory Overhaul factory Overhaul factory Aircraft manufacturer MOH 037-DK 01.06.77 Replacement of the stabilizer attachment fork-bolt No. 3000-02 0101, 0401, 0601-0614 Aircraft manufacturer 30.09.77 038-DK 01.09.77 Replacement of bushings No.4210- 05 in upper part of nose landing gear bracing strut 0101, 0401, 0601-2014 Overhaul factory MOH 039-DK 27.02.78 Replacement of 2KNR buttons with PK2S- 2 buttons for "Radio" and "Intercom" 0101, 0402 0601-1415 Overhaul factory MOH 040-DK 02.12.77 Installation of the reinforcement plate on the pilot's seat sliding rail 0101, 0601-2015 Overhaul factory MOH 041-DK 09.02.78 Elimination of plays in rudder pedals mechanism 0102, 0101-2015 Overhaul factory MOH 042-DK 01.09.77 Replacement of the wing center section diaphragm post with the reinforced post 0101, 0401, 0601-0614 Overhaul factory MOH 043-DK 02.12.77 Reinforcement of the carburetor inlet pipe 0101, 0401, 0601-23617 Overhaul factory MOH 045-E (6328/185-E) 17.07.78 Increasing the life time and calendar life for nose landing gear jack All Information bulletin 046-DK 18.07.79 Fin reinforcement 0101, 0601-23961 Overhaul factory MOH 047-E 23.03.78 Manuals clarification 0115-2015 Operator 31.08.78 048-DK 05.01.78 Replacement of elevator flanges for reinforced ones 0101, 0401, 0601-23961 Overhaul factory MOH 049-DK 18.03.79 Replacement of aileron's and elevator's brackets due to the replacement of MP-5 alloy with the AL-19 alloy 0401, 0601-1006 Part 1: 0601-1706 Overhaul factory MOH 050-DK 02.12.78 Installation of additional stabilizer attachment point 0401, 0601-1018 Overhaul factory MOH 051-DK 24.05.78 Lower engine cowling reinforcement 0401, 0601-2016 Overhaul factory MOH 052-DK 09.06.78 Reinforcement of cockpit ventilation pipes, compressor and generator cooling ducts 0101, 0401, 0601-2014 Overhaul factory MOH 053-DK (6328/193) 25.04.78 Replacement of undercarriage jacks No.4114-00 Till 06067 Aircraft manufacturer 31.08.79
Show full textShow less
054-DK 06.02.78 Oil tank leaks elimination 0101, 0601-2014 Maintenance organization If necessary 055-DK 08.02.78 Replacement of fuel tanks 6101- 001V with reinforced ones 6101- 00D 0601-1111 Overhaul factory 30.12.79 057-DK 10.08.78 Clarification of bulletin No. 32-DK 0601-0415 Overhaul factory On SB receipt 058-DK 02.12.78 Fuel system modification: 1. Replacement of the tee-piece No.6100- 06 with the new shape tee-piece 2. Installation of the additional attachment point for the pipe No.6100-00 0601-23617 0601-2011 Overhaul factory 30.12.79 059-DK 09.06.78 Installation of the IL-611-150 regulator in the charging device 0601-0516 Aircraft manufacturer 31.12.79 060-DK 09.06.78 Installation of plates on the wing center section skin near the landing flap 0601-21921 Overhaul factory MOH 061-DK 10.08.78 Replacement of aluminium pipes with steel pipes 0101, 0401 0601-23015 Overhaul factory MOH 062-DK 30.11.78 Installation of the plate on the relay box 0101, 0401, 0601-23617 Overhaul factory MOH 063-DK 10.04.79 Airplane modification for the installation of engine equipped with M9F magneto 0101, 0601-23516 Overhaul factory MOH 064-IK 31.07.78 Introduction of new airplanes numbering 21517 and up Aircraft manufacturer permanent 065-DK 21.02.79 1. Fuel tank compartment inspection and replacement of bracket 2006- 11 2. Undercut of the middle stringer of the removable panel of the tank compartment. 0601-1016 0601-30003 Aircraft manufacturer In accordance with the plan of Civil Aviation Ministry 066-DK 10.08.78 Clarification of serial numbers of airplanes to be modified in accordance with bulletins 35, 43, 48, 51 DK 0601-2018 Refer to Service Bulletin 067-DK (6328/220R) 05.09.78 Changing of the attachment of main landing gear shock absorber obturator Shock absorber till 01.04.77 Overhaul factory MOH 068-DK 10.08.78 Extending the validity of the bulletin No.15-DK 1108-0814 Aircraft manufacturer MOH 069-E 08.06.79 Manuals clarification 0601-30016 Information bulletin 070-E 21.02.79 1. Extending air bottles life time and calendar life. 2. Interchangeability of fuel meters SBES- 2077A and SBES- 207B all 0601-0813 Information bulletin 071-DK 29.06.79 Replacement of exhaust pipes made from Steel 20 with exhaust pipes made from 12H18N10T 0601-30928 Aircraft manufacturer From 2nd MOH 072-DK 08.06.79 Modification of fuel breathing system in order to make separate breathing 0601-2007 Overhaul factory MOH 073-DK 22.09.79 Reinforcement of the elevator trim tab control system 0601-34032 Overhaul factory MOH 074-DK 08.06.79 1. Installation of the additional pneumatic system non-return valve 2. Separation of emergency air system from the main one 0401, 0601-30216 Aircraft manufacturer 31.12.80 075-IK 31.01.79 Structural changes of airplanes 1313-23617 Information bulletin 076-DK 12.03.79 Replacement of attachment bolts for wing center section fairing 0401, 0601-2014 Overhaul factory MOH 077-DK 18.06.79 Installation of the plate on cockpit doors within the upper hinge area 0601-32816 Overhaul factory MOH 078-DK 10.02.80 Replacement of the door lock fixing arm with the longer arm No.0134-07 0601-37290 Overhaul factory MOH 079-DK 26.07.79 Installation of the plate on the shape No.0100-21-1,-2 on the 9th bulkhead 0601-32230 Overhaul factory MOH 080-R 23.10.79 Addendum to „The MOH manual“ all Overhaul factory On SB receipt 081-E 08.06.79 Manuals clarification 0601-32875 Operator On SB receipt 082-E 24.04.79 Increasing of the life time before the first MOH for lower arms of undercarriage bracing struts all Operator 084-DM 21.10.82 Installation of SARPP-12K flight data registration system 0601-41817 Overhaul factory MOH 085-DK 05.04.80 Addendum to the bulletin No.40-DK 1. Installation of the reinforcement plate on the rail No.7509-211 2.Reaming seat fixation holes 8x9 in seat rails 0601-2005 0601-37290 Overhaul factory MOH 086-DK 13.02.80 Emergency door jettison mechanism modification 0601-40212 Overhaul factory MOH 087-BD 03.06.82 Replacement of the metal oil cooler fairing with the glass fiber fairing 0601-47287 Overhaul factory MOH 088-E (6328/249E) 14.06.79 Landing gear life time extension all Operator On SB receipt 089-R (6328/254R) 24.10.79 Replacement of the shock absorber ring No.4111-11 with the ring No.4111-00 4111-00 till 01.04.79 Overhaul factory MOH 81127- R 02.04.82 Addendum to the carburetor repair technology All Information bulletin 090-DK 07.02.80 AK-50 compressor cooling improvement 0601-0910 Overhaul factory MOH 091-E 07.06.80 Manuals clarification 0114-34016 Operator On SB receipt 092-DK 22.09.81 Replacement of the landing gear switch bracket with the improved one 0601-37219 Overhaul factory MOH 093-DK 19.12.80 Reinforcement of the landing flap hinge 0401, 0601-2015 Overhaul factory MOH 094-DK 13.06.80 Replacement of the terminal in the trim tab neutral position warning system 0401, 0601-37290 Overhaul factory MOH 095-DK 13.11.80 Installation of the additional instrument panel shock mount 0601-34139 Overhaul factory MOH 096-DM 24.11.80 Replacement of the "Landysh-5" radio with "Baklan" radio 0601-37192 Overhaul factory MOH 097-DK 22.08.80 Reinforcement of the wing center section skin along the rib No.4 (if cracks occur) 0601-1012 Overhaul factory MOH or if cracks occur 098-DK 25.12.80 Reinforcement of the landing flap within the area of pneumatic jack attachment 0601-40019 Overhaul factory MOH 099-DK 22.09.81 Elevator structure reinforcement 0601-44604 Overhaul factory MOH 100-R 22.07.80 MOH documentation clarification 0601-34066 Operator 3 month after SB receipt 101-E 16.04.81 Manuals clarification 0114-40044 Operator 1 month after SB receipt 102-DK 20.04.81 Reinforcement of relay box attachment points 0601-40044 Overhaul factory MOH 103-DK 20.04.81 Replacement of fuel tank aluminium attachment bands with steel bands 0601-30928 Overhaul factory 30.06.82 104-DK 04.02.81 Clarification of bulletins No.61-DK and No.86-DK see 061-DK & 086-DK Operator 105-DK (6328/308) 22.09.81 Replacement of faulty cylinders No. 4114-00A with cylinders No.4114-00B 4114-00A till 11/80 Overhaul factory 22.03.83 106-DK 24.09.81 Reinforcement of the rudder structure within the trim tab attachment area 0601-44604 Overhaul factory MOH 107-DK 10.11.81 Installation of aircraft electric grounding device 0601-34062 Aircraft manufacturer 31.12.82 108-DK 03.06.82 Reinforcement of the carburetor intake 0601-50376 Overhaul factory MOH 109-IK 10.06.81 Major structural changes of airplane S/N 22202023624 through 22202044794 23624- 44794 Information bulletin 110-E (6328/335E) 12.11.81 Reducing landing gear shock absorbers charging pressure 0601-0730 Maintenance organization 30.12.82 111-E 21.05.82 Manuals clarification 0114-47817 Information bulletin 112-DK 22.06.82 Modification of pilots’ seat control cable termination 0601-47389 Overhaul factory MOH 113-DK 03.06.82 Replacement of brackets, which attach ribs to the rear spar 0601-44794 Overhaul factory MOH 114-DK 30.06.82 1. Replacement of pneumatic panel No.5801-00A with the pneumatic panel No.5801-00B 2. Installation of the main air bottle drain system 3. Transfer of the main air bottle to the left part of luggage compartment 0601-30216 0601-32816 0601-2006 Overhaul factory MOH 115-BU 14.07.82 Replacement of AZP-1BM with AZP-A2 0601-44812 Maintenance organization If found inop 116-DM 21.01.84 Critical angle of attack warning installation 0601-47817 Aircraft manufacturer MOH 117-DK 29.12.81 Replacement of outer and middle aileron hinges 0601-49488 Aircraft manufacturer 30.06.83 118-DA 25.11.81 Periodical inspection of the middle aileron hinge bracket 0601-49488 Maintenance organization During scheduled maintenance 119-E 28.04.82 Manual clarification (elimination of summer heating) 0601-47817 Information bulletin 120-BR 21.05.82 MOH Manual text clarification All Information bulletin 121-BD 04.10.82 Preventing of cracks and galling of rollers No.5200-20 located on the bulkhead No.12 0601-50376 Overhaul factory MOH 122-BR 04.10.82 MOH Manual clarification (rudder control) Information bulletin 123-BD 13.05.83 Preventing the aileron inboard hinge bolt No.2000-19 wear out 0601-34139 Overhaul factory MOH 124-BR 03.05.83 MOH Manual clarification (bulletins No.87 and No.117) All Information bulletin 125-BE 14.05.82 Manual clarification (regarding the replacement of AEP-MB with AEP- A2) All Information bulletin 126-BR 14.07.82 Manual clarification (regarding AZP) All Information bulletin 127-BD 04.10.82 Elimination of engine cowling shapes wear out 0601-32230 Aircraft manufacturer 30.06.83 128-BD 18.10.82 Replacement of attachment eyebolts on the aileron outboard bracket 0601-51822 Overhaul factory MOH 129 BD 28.03.83 Replacement of the pitot attachment tube with the reinforced one 0601-55418 Overhaul factory MOH 130-BR 09.09.82 Clarification of Operational and MOH Manuals regarding aileron's attachment brackets 0601-55612 Maintenance organization MOH 131-BE 28.07.83 Clarification of Operational and MOH Manuals regarding the SSKUA-1 flight data recording system All Maintenance organization, Operator After SB 116- DM 132-BD 04.03.83 Replacement of exhaust collector and exhaust pipe repair 0601-55612 Overhaul factory If necessary 133-BD 20.07.83 Expanding of the bulletin No.32-DK application 0112-55612 Overhaul factory MOH 134-BD 20.07.83 Installation of Teflon washers for the wing fairing attachment bolts 0601-44794 Cancelled by the bulletin No.195-BD 135-BD 23.11.83 Replacement of the lever No.6500-71 with the reinforced one All Aircraft manufacturer MOH after 1500 hours 136-BD 04.11.83 Preventing fin fabric skin ruptures 0601-55612 Cancelled by the bulletin No.200-BD 138-BE 05.11.83 Manuals clarification (installation and dismounting of landing gear jacks) 0601-55612 Overhaul factory On SB receipt 139-BR 23.02.84 MOH Manual clarification (throttle control) 0601-55612 Overhaul factory 3 month after SB receipt 140-BD 10.02.86 Preventing destruction of the relay No.7230 box attachment 0601-55612 Overhaul factory MOH 141-BD 17.07.84 Reinforcement of the attachment area of elevator control bracket No. 5130-30 0601-55612 Overhaul factory MOH 142-BU 06.07.84 Hole in the trim tab control linkage No.5410-140SB 0601-55612 Aircraft manufacturer MOH 143-BE 14.07.84 Operation manual clarification All Information bulletin 144-BD 20.03.86 1.Replacement of wing attachment fittings for thicker ones 2. Replacement of wing attachment bolts 0601-2011 0601-2010 Aircraft manufacturer MOH 145-BR 11.12.84 MOH Manual clarification All Information bulletin 146-BD 01.11.84 Installation of the fuel breathing system cover No.6100-94 instead of the constrictor 0601-44604 Operation within summer season 147-BU 28.03.85 Installation of the first-aid box 0601-2007 Overhaul factory MOH 148-BD 23.11.84 Installation of bonding stripes between engine cowling and fuselage 0601-34027 Overhaul factory MOH 149-BU 26.03.85 Replacement of the oil system valve No.6204-05 with the steel valve made from 12H18A10T 0601-55612 Overhaul factory MOH 150-BU 16.04.85 Replacement of oil tank with the reinforced oil tank No.6201-100 0601-37290 Aircraft manufacturer MOH 151-BD 05.09.85 Reinforcement and replacement of stops No.5130-50 and No.5130-90 in airplane control system 0601-55612 Overhaul Factory and Maintenance Organization 152-BR 31.05.85 Clarification of MOH Manual and parts catalogue All Information bulletin 153-BD 06.02.86 Replacement of control column attachment bolts with bolts No.3027- 6-18, Control column replacement 0601-55612 Aircraft manufacturer MOH 154-BD 20.02.85 Installation of the eyebolt No.5410- 1410SB in trim tab control system 0601-55612 Overhaul factory MOH 155-BU 18.04.85 Installation of spring cylinder on RH landing gear 34019- 34139 Aircraft manufacturer MOH 157-BD 10.04.86 Replacement of brackets 0161-20, 0161- 30 with reinforced ones 0601-55612 Both Aircraft Manufacturer and Overhaul Factory MOH 158-BD 16.08.85 Fuel system, modification of drain system 0601-55612 Aircraft manufacturer 16.11.85 159-BE 29.05.85 Manuals clarification (nuts tightening with preselect torque) 0601-55612 Aircraft manufacturer 29.08.86 160-BE 18.12.84 Manuals clarification (increasing time between MOHs) All Information bulletin 161-BD 29.10.86 Reinforcement of ribs nose parts attachment to the wing center section front spar 0601-0730 Overhaul factory MOH 162-BD 16.05.85 Replacement of the clamp No.6801- 110V-7 with the clamp No. 6801-310 0601-0730 Overhaul factory, Operator On SB receipt 163-BD 16.05.85 Replacement of gills bolts No.6303- 171 with higher strength bolts 0601-55612 Overhaul factory MOH 164-BD 16.08.85 Replacement of the engine cowling lock case No.6902-81 0601-55612 Overhaul factory, Operator If cracks found 165-BD 14.02.86 Replacement of throttle handle for the reinforced throttle handle No.7003-20 0601-55612 Aircraft manufacturer MOH 166-BD 13.12.86 Replacement of the R-2 governor pawl No.6500-203 with the improved pawl No.6500-211 0601-0730 Aircraft manufacturer MOH 167-BD 13.02.86 Replacement of carburetor scoop hinge 0601-55612 Aircraft manufacturer MOH 168-BD 09.06.86 Replacement of the bracket 6500-10 with the improved bracket 6500-230 0601-0730 Overhaul factory MOH 169-BD 02.07.85 Replacement of the center support bolt No.3000-11 with the bolt 3000-13 0601-55612 Aircraft manufacturer MOH 170-BD 16.05.86 Preventing brake control cable ruptures 0601-0730 Overhaul factory MOH 171-BD 03.03.86 Installation of bushings under the PU- 7 valve control screw 0601-0730 Maintenance organization 03.09.86 172-BU 29.01.86 Installation of bushings under shut-off valve handle attachment screw 0601-55612 Overhaul factory MOH 173-BD 15.01.86 Replacement of the attachment bracket No.0200-30 on the rear stabilizer attachment point 0601-55612 Aircraft manufacturer MOH 175-BD 08.04.86 Installation of the edge former around the oil cooler cut-out 0601-55612 Overhaul Factory or Maintenance Organization if cracks found MOH or during operation, if cracks found 176-BD 11.05.86 Air heater modification 0601-55612 Overhaul factory MOH 177-BD 24.03.87 Installation of light- and sound- warning system for landing gear retracted position All Overhaul factory MOH 178-BD 11.12.85 Changing of the US-450 air speed indicator installation 0601-55612 Overhaul factory 31.12.1986 179-BD 14.07.86 Cockpit doors modification 0601-55612 Overhaul factory MOH 180-BD 15.05.86 Reinforcement of bulkhead No.0, No.8 and profile 0100-20 0601-55612 Overhaul factory MOH 181-BD 30.10.86 Replacement of rudder flange and bearing in the lower rudder hinge 0601-55612 Overhaul factory MOH 182-BD 25.06.86 Installation of reinforcement plates on the canopy post No.0160-40 0601-55612 Overhaul factory MOH 183-BD 27.08.86 Replacement of aileron attachment bolts No.2000-19 with No.2000-19A 0601-55612 Overhaul factory MOH 185-BD 15.05.86 Manuals clarification (regarding air heater) All Information bulletin 186-BD 25.06.86 Reinforcement of attachment of ribs tail parts to the wing rear spar 0601-55612 Overhaul factory MOH 187-BE 24.03.87 Manuals clarification (regarding bulletin No.177-BD) All Information bulletin 188-BR 15.06.87 Clarification of MOH Manual and parts catalogue (regarding bulletin No.177-BD) All Information bulletin 189-BR 30.10.86 Clarification of MOH Manual All Information bulletin 190-BD 29.10.86 Replacement of the battery access door diaphragm with the reinforced diaphragm No.1020-180-31 0601-55612 Overhaul factory MOH 191-BD 29.10.86 Replacement of the diaphragm which connects tail parts of ribs within the wing center section 0601-55612 Overhaul factory MOH 192-BD 29.10.86 Replacement of flaps in the PO-250 access door hinge 0601-55612 Overhaul factory MOH 193-BD 29.10.86 Replacement of shapes in the PO- 250 compartment with reinforced shapes 0601-55612 Aircraft manufacturer MOH 194-BD 29.10.86 Replacement of the wing center section step band No.1020-80-90 with new one 0601-55612 Overhaul Factory During operation 195-BD 08.07.87 Replacement of teflon washers under the wing fairing attachment bolts 0601-55612 Overhaul Factory or Maintenance Organization MOH or during operation 196-BD 26.08.86 Replacement of loose rivets attaching lower skin to the wing center section 0601-55612 Overhaul factory MOH 197-BD 27.08.86 Elimination of cracks on the oil cooler inlet. Arc welding 0601-55612 Overhaul factory MOH 198-BE 08.05.87 Clarification of weight and balance data 0601-55612 Information bulletin 200-BD 11.03.87 Fin skin reinforcement and repair 0601-55612 Overhaul Factory MOH 201-BD 13.04.87 Replacement of canopy bracket No. 0161-10 with the reinforced one 0601-55612 Overhaul factory MOH 202-BU 05.01.87 Replacement of balls in landing gear jacks 0601-0730 Overhaul factory MOH 203-BD 13.04.87 Addendum to the bulletin No.157-BD (regarding canopy brackets replacement) 0601-2009, 0110-55612 Information bulletin 204-BD 08.05.87 Installation of the cover No.9960-120 for the DS-1 sender protection 0601-47817 Aircraft manufacturer During operation 205-BE 08.05.87 Clarification of the bulletin No.173-BD (bracket replacement after 2000 flight hours 0601-55612 After 2000 flight hours 206-BR 10.11.87 Clarification of MOH Manual and parts catalogue All Information bulletin 207-BD 01.09.87 Replacement of control column locking bolts and their wire locking 0601-55612 Overhaul Factory MOH 208-BD 02.09.87 Replacement of shapes attaching ribs to the front wing spar All Overhaul Factory MOH 209-BD 04.04.88 Modification of fuel breathing system 0601-55612 211-BD 04.04.88 Manuals clarification (regarding bulletin No.209-BD) 0601-55612 Information bulletin 212-BR 04.04.88 MOH Manual clarification (regarding bulletin No.209-BD) All Information bulletin 215-BD 19.02.88 Replacement of the MU-615 sender attachment (SARPP-12K system) 0601-55612 Overhaul Factory MOH 222-BD 16.01.89 Enclosure of part 1 of SB 028-DK to S/N 0115-2220255612 0115-55612 Aircraft manufacturer During operation 251-BE 05.02.99 Clarification of SB 205-BE 0601-55612 0131 and up Operator, Overhaul factory 1 month after SB receipt 252-BE 05.02.99 Clarification of SB 173-BE 0601-55612 0131 and up Operator, Overhaul factory 1 month after SB receipt 253-BE 05.02.99 Control system, Replacement of control column attachment bolts, Clarification of SB 153-BE 0601-55612 0131-1534 Operator, Overhaul factory 1 month after SB receipt 254-BD 13.02.07 Installation of ELT ARM-406AC1 0601-0730, 0131-2035, Excl. 0233, 0234,0334, 0431, 0434, 0534, 0634, 0932, 1134, 1433,1633 255-BD 14.05.08 Modernization of Yak-18T Information bulletin 256-BU 07.04.09 Use of propeller AV-803-1-K- C/CL250- 412 or B530TA-D35 on aircraft 36 th series and a/c modified iaw. SB 255-BD A/C of 36 th series and a/c modified iaw. SB 255-BD Information bulletin 257-BE 07.04.09 Powerplant, Amended AMM and AFM If SB 256- BU installed 258-BD 09.06.09 Instrument panel, Horizon 4300-311 0136-4936, and S/N modified iaw. SB 255-BD: 0334, 0534, 1134, 0431, 1433, 0636, 1633, 0932, 0434. Aircraft manufacturer 01.09.2009 259-BD 09.06.09 Wing, additional rivets on wing spar 0136-2336, 2636-4336 Aircraft supplier 15.07.2009 260-BD 09.09.09 Fuel system, Replacement of parts in drain system and fuel sensor 395-5S- 1B 0136-4336 Aircraft supplier 20.10.2009 261-BE-G 06.05.11 Conditions and order of establishment of resources and service life of airplanes Yak-18T brought in the State Register of Civil Aircrafts of the Russian Federation (MS-1000 & MS-2000) All Aircraft manufacturer Permanently Notes SB marked in Green are Mandatory. No Mandatory Service Bulletins (Airworthiness Directives) have been issued subsequent to 1998. MOH = Major Overhaul at a Yakovlev certified facility Source: Yakovlev Design Bureau, EASA 2013