Bonanza Service Letters

Service Letter

Kit  No.

  

   SL date issued 

 35 A35 B35 C35 D35 E35 F35 G35 H35 J35 K35 M35
APPROVED 'BG' TYPE SPARK PLUGS FOR E-165   *   1
APPROVED SPARK PLUGS FOR E-185   * Issued: 4-10-47

Revised: 1-8-48

 1 1
MODIFICATION OF OIL SEPARATOR DRAIN LINE   *   2
MODIFICATION OF MANIFOLD PRESSURE INSTRUMENT   * 5-10-47 3
REMOVAL OF SCREW ON THE ASSIST STEP REINFORCEMENT GUIDE   * 5-10-47 4
INSPECTION OF FLAP TRACK ROLLERS   * 5-10-47 5
HANDLING OF CABIN DOOR   * 5-10-47 6 2 1 1
MODIFICATION OF OIL TANK FILLER CAP RETAINING CHAIN   * 5-26-47 7
ADDITION OF CABIN COLD AIR INLETS  35-508 * 5-26-47 8
FUEL SYSTEM TROUBLESHOOTING AND STARTING DIFFICULTIES 35-509 * - 9
ADDITION OF LATCHING RELAY TO STARTER CIRCUIT 35-512A,B,C * 12-15-47 10
STARTER CIRCUIT MODIFICATION TO INCREASE STARTER POWER   * 11-10-48 ?
MODIFICATION OF NOSE GEAR RETRACT LINKAGE BY INSTALLING SOLID SHANK ROD ENDS   * 9-19-47 11
RELOCATION OF MAGNETIC COMPASS AIRPATH C2400-LP 35-514 *   12
MODIFICATION OF FUEL TANK VENT LINE   * 7-18-47 13
PROTECTIVE COVERS FOR LANDING GEAR UP-LOCK AND AILERON CABLES 35-524 * 1-28-48 14
MODIFICATION OF FLAP GAP DOORS 35-525 * 1-6-48 15
CABIN DOOR EMERGENCY RELEASE   * Issued:7-18-47

Reprinted: 4-10-50

 16 3
INSTALLATION OF AN EXTERNAL ADJUSTMENT ON THE FUEL PUMP 35-515 *   17
MODIFICATION OF REAR JACK POINT   * 2-1-49 17
MODIFICATION OF OIL TANK OUTLET CHECK VALVE 35-518 *   18
PROPELLER MODIFICATION 35-522 *   19
        20
MODIFICATION OF NOSE SECTION LONGERON   * - 21
INSPECTION OF CYLINDER HEAD AND OIL TEMPERATURE LEADS IN VICINITY OF AILERON CONTROL KNEES   *   22
VACUUM PUMP MODIFICATIONS   * 8-19-49 23
REPLACEMENT OF TRAILING ANTENNA MAST INSULATOR   * Issued:1-9-48

Reprinted: 3-11-49

 24
INSTALLATION OF BATTERY SERVICING INSTRUCTIONS   * - 25
RUBBER GROMMET INSTALLATION ON PROPELLER MOUNTING   * Issued: 1-26-48

Reprinted: 4-10-50

 26 4
SUB-ZERO OPERATIONAL AIDS FOR THE BONANZA Several listed *

Revised: 12-24-48

 27 5
LANDING GEAR UP-LOCK INSPECTION   * Issued:3-22-48

Reprinted: 4-10-50

 28 6 3
PROPELLER HUB IDENTIFICATION   * Issued:6-3-48

Reprinted: 4-10-50

 29 7
MODIFICATION OF OIL TANK VENT SYSTEM 35-539 * 6-15-48 30
MODEL 35 STARTER TROUBLESHOOTING   * Issued:7-1-48

Reprinted: 4-10-50

 31 8
REMOVAL OF SECONDARY INDICATOR ON FUEL SELECTOR VALVE   * Issued:7-15-48

Reprinted: 4-10-50

 32 9
INSPECTION OF FUEL INLET HOSE   * Issued:9-30-48

Reprinted: 4-10-50

 33 10 4
INSPECTION OF ENGINE EXHAUST STACKS     Issued:11-1-48

Reprinted: 4-10-50

 34 11 5
MODIFICATION OF FUEL UNIT HANDLE   * 11-15-48 35 12
INSPECTION OF FORWARD HINGES ON NOSE DOOR   * 12-13-48 36 13
OPERATION OF ELECTRIC DRIVEN AUXILIARY FUEL PUMP   * 12-22-48 37 14
MODIFICATION OF OIL TANK DRAIN FITTING   * Issued:1-26-49

Reprinted: 8-13-51

 38 15
INSPECTION OF NOSE GEAR DOOR ACTUATOR SHAFT ASSEMBLY   * Issued:6-10-49

Reprinted: 8-13-51

 39 16
MODIFICATION OF FIREWALL CENTER CHANNEL   * 7-29-49 40 18
CLEANING AND REPAIR OF OIL TANK     Issued:1-25-50

Reprinted:11-30-50

 41 19 6
INSPECTION OF FLAP ACTUATOR BRACKET   * Issued:2-27-50

Reprinted: 11-30-50

 42 20 7
MODIFICATION OF CRANKCASE BREATHER LINE TO PREVENT ICING 35-550 * Issued:3-20-50

Reprinted: 11-30-50

 43 21 8
OIL SYSTEM CHECK VALVE IDENTIFICATION   * Issued:3-28-50

Reprinted: 11-30-50

 44 22 9
WHIP ANTENNA MODIFICATION   * 6-30-50 - 23 10
 
 
                         
TRIM TAB EXCHANGE   * Issued:11-13-50

Reprinted: 1-15-55

 - 26                    
INSPECTION OF FUEL TANK VENT LINE   * 8-15-51

Rev.1-15-54

 45 27 12 8 7 7            
REWORK OF INSTRUMENT SUBPANELS   * 11-1-52 46 28 13 10                
INSPECTION OF ELEVATOR TAB CABLES FOR PROPER TENSION   * Issued:11-15-53

Reprinted: 4-1-54

 47 29 14 11 4 5            
MODIFICATION OF LANDING GEAR TO PERMIT LOWERING OF LANDING GEAR AT HIGHER SPEEDS   * 8-15-55 48 30 15 15 8 9            
RECOMMENDED USE OF MODEL 215 PROPELLER WITH 84" DIAMETER BLADES   * 2-22-55

Rev. 6-1-55

 49 31 16 16 9 10 8          
STATIC PRESSURE LINE INSPECTION   * 4-15-55 50 32 17 17 10 11 9          
ADDITIONAL SHOCK CORD ON STEP RETRACT MECHANISM   * 1-20-56 51 33 18 18 11 12 10          
INSPECTION OF BONANZA LANDING GEAR LIMIT SWITCHES   * 1-6-56 52 34 19 19 12 13 11          
INSPECTION OF NOSE GEAR LIFT LEG BOLT   * 2-28-56 53 35 20 20 13 14 12 8        
LEAR WHIP ANTENNA MOUNTING   * 7-2-56 54 36 21 21 - - - -        
IMPROVED NOSE GEAR RETRACT ROD PLUNGER   * 9-24-56 55 37 22 22 14 15 13 9        
REWORK OF FUEL CELL CAP SEALS   * 9-25-56 56 38 23 23 15 16 14 10        
INSTALLATION OF OIL SEPARATOR IN CRANKCASE BREATHER LINE 35-620 * 10-15-56 ? 39 24 24 16 17 15 11        
FUEL CELL VENT MODIFICATION   * May, 1957 58 40 25 25 17 18 16 12 1      
INSPECTION OF ENGINE MOUNTING BRACKETS   * Dec., 1957 59 41 26 26 18 19 17 13        
AIRHART AUTOMATIC BRAKE RELEASE UNITS   * Jan., 1959 60 42 27 27 19 20 18 14 9 4 1  
SEALING THE MOVABLE SIDE WINDOWS    * April, 1959 61 43 28 29? 21? 22? 20 16 12 6 4   
ROTATING BEACON (BELLY INSTALLATION) 35-645 * Aug., 1959 62 44 29 30 22 23 21 17 13 7 5  
HEATED FUEL CELL VENTS 35-659-1

35-659-2

 * April, 1960 63 45 30 31 23 24 22 18 14 8 6 3
NOSE STRUT BRACE INSPECTION FOR CORROSION IN THE FELT PAD GROVE    * Dec., 1959 64 46 31 28 20 21 19 15 11 5 3  
INSPECTION OF PROPELLER PITCH CHANGE MOUNTING PLATE   * Dec., 1959 65 47 32 32 24 25 25 21        
IMPORTANCE OF CABIN HEATING SYSTEM PERIODIC INSPECTION   * Dec., 1959 66 48 33 33 25 26 26 22 19 14 11 1