LIST OF BULLETINS ISSUED FOR L23 GLIDERS ------------------------------------------------------------------------------------------------------------------------------- Number Description Effectiveness -------------------------------------------------------------------------------------------------------------------------------- L23 /001a Flight Manual Amendment Do-L23.1011.3 - Chapters 1,4, and 8 Change /002a A change of the lower tail skid suspension 897501-897520,907601-907614 and the reinforcement of the fuselage. /003a Tail skid replacement. 907601-907613 /004a The bottom towing hook is turned of 907609-907611,907620,907621 about 10 backwards. /005a Flight Manual small Changes Do-L23.1011.3 /006 Not issued. /007 Not issued. /008a The Flight Manual Do-L23.1011.3 /009a Wheel spur adjustment. 897501-917930 /010a Tail-wheel landing gear is modified - 897501-897520,907601-907630 better sprung now. 907701-907730,917801-917830 917901-917921 /011a Flight Manual and Maintenance Manual Do-L23.1004.4 Amendments for Aerobatic Operation. Do-L23.1031.4 /012a The replacement of the adjustment strap of 897501-897520,907601-907630 the forward pilot's backrest. 907701-907730,917801-917830 917901-917930 /013a Placards are additionaly installed in both 917803,917826,917814-917817 pilot's cockpits,and a luggage net in the 917905,917906,917911,917912 luggage hold. 917914-917917,917921-917924 917926-917928,928001,928002 928006,928007 /014a Flight Manual - Centre of Gravity Range Do-L23.1011.3 Extension tel: +420 572 81 7664, fax: +420 572 81 7669, bohumila.krizkova@let.cz, www.let.cz 1/5
/015a Flight Manual Amendment Do-L23.1011.4 (only in English) /016a Flight Manual - Max. Speed Limitation Do-L23.1011.1 (only in Czech language) /017a The Flight Manual Do-L23.1011.4 938101 and subsequent The Maintenance Manual Do-L23.1031.4 /018a The structure under the rudder footstep 897501-897520,907601-907630 bearing is not sufficiently rigit. 907701-907730,917801-917830 917901-917930,928001-928010 938011-938030,938101-938110 948111-948130, /019b To improve sailplane handling on the ground. 897501-897520,907601-907630 907701-907730,917801-917830 917901-917930,928001-928010 938011-938030,938101-938110 948111-948130, /020a The Flight Manual Do-L23.1011.4 for German speaking The Maintenance Manual Do-L23.1031.4 countries only /021a The Flight Manual Do-L23.1012.3 /022a Wing-tip extensions used on L - 23 Do-L 23.1031.3 /023a The Flight Manual Do-L23-1011.4 /024a The airspeed indicator exhange 938101-938104 LUN 1106.10-8 for LUN 1106.22-8 /025a Flight Manual Do-L23-1012.1 The Bulletin was not issued in English language. /026a Flight Manual Amendment and Small Do-L23.1012 Changes /027a Maintenance Manual Amendment Do-L 23.1031.3 - Part 5 change /028a Maintenance Manual Amendment Do-L23-1031.3 tel: +420 572 81 7664, fax: +420 572 81 7669, bohumila.krizkova@let.cz, www.let.cz 2/5
/029a Flight Manual Amendment - variometer Do-L23.1012.1 ILEC SC-7,indicator RAZ Do-L23.1012.3 Do-L23.1012.5 /030a Flight Manual Amendment DO-L23.1012.5 -preflight checks /031a Flight Manual Amendment Do-L23.1012.5 - transfer to metric units /032a Flight Manual Amendment Do-L23.1012.3 (CAN) - Model 96 Do-L23.1012.4 (GER) Do-L23.1012.6 (BRAZ) /033a Maintenance Manual for the Do-L23-1031.3 /034a Flight Manual Amendment Do-L23.1012.4 (GER) - Model 96 /035a Flight Manual Do-L23.1012.3 - insertion of Section 9 Do-L23.1012.4 Do-L23.1012.5 Do-L23.1012.6 /036a Maintenance Manual for the Do-L23-1031.3 Do-L23-1031.4 /037a Flight Manual Amendment Do-L23-1013.1 The Bulletin was not issued in English S/N X-02 language. /038b Resurses of inspection of 2,3,4 types are L23 gliders lengthened by 1 year with all L23 gliders /039a Maintenance Manual for the Do-L23-1031.3 /040b Establishment of a new company named L23 gliders LETECKÉ ZÁVODY a.s. /041a Maintenance Manual Chapter 11 L23 Do-L23-1031.3 tel: +420 572 81 7664, fax: +420 572 81 7669, bohumila.krizkova@let.cz, www.let.cz 3/5
/042 Not issued. /043a Flight Manual correction of the maximum L23 useful load value Do-L23.1014.5 /044 Not issued. /045 Not issued. /046 Not issued. /047 Not issued. /048a Check of the elevator rocker lever for possible L23 up to S/N 039019 cracks finding CAA-AD-T-005/2004 /049a Flight Manual Increase of the maximum také-off L23 weight up to 530 kg Do-L23.1012.4 /050a Check of the control bridge at the place of L23 gripping of control levers in the front and rear cockpit. Replaced by Revision No. 1. /050a Revision No. 1 L23 supplements information about subsequential routine check at periodic maintenance and supplements information about Bridge older type of design. Replaced by Revision No. 2. /050a Revision No. 2 L23 Minor corrections in a text. /051a Checks for cracks at ribs and stringers in areas L23 of wing skin joints at ribs No. 7 and 13. /052a Check of internal elevator hinges on the stabilizer L23 area and its potential replacement. /053a Inspection of welded bracket (Drwg. No. L23 A730 420N) located on the fin. /054b Replacement of A730 420N bracket in case of L23 cracks finding in the course of MB L23/053a execution. tel: +420 572 81 7664, fax: +420 572 81 7669, bohumila.krizkova@let.cz, www.let.cz 4/5
/054b Revision No. 1 L23 Supplements world-wide available material. UPDATE: July 20, 2011 This list of bulletins is up-dated always after issue of new bulletin however not more often than once a month. tel: +420 572 81 7664, fax: +420 572 81 7669, bohumila.krizkova@let.cz, www.let.cz 5/5