Clipart © by Leif Pettersson

Clipart © by Leif Pettersson

 
      Modification / Service Bulletin Index

             This index is based on SAAB SB No 91.0.001 Tenth Issue (revised in December 2000)

            The following is a list of all active Safir Modification and Service Bulletins
            at this time .

            Those not included are obsolete and will not be reissued.

            Modification Bulletins

            Modification Bulletins are divided into four classes, see below, depending on the
            degree of  "Urgency" as to introduction of the same.
            Modification Bulletins of the first two classes deal with flight safety matters.
            The other two deal with the serviceability of the aircraft.

            Table of classes and explanations:

            I        Mandatory
            II       Recommended to be embodied a certain time period.
            III      Recommended
            IV      Optional

            Note: On aircraft included in column "Aircraft Conserned" but not mentioned
                      in corresponding Modification Bulletin, the Modification has been
                      carried out before delivery from factory.

Table 1.    Modification Bulletins
 

Bulletin       Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft conserned
91.1/1	March 1948	Front hood	x					III	91.102-123
91.1/2	Aug 1948	Hood parking struts	x					III	91.102-148
91.1/3	April 1948	Tank suspension	x					III	91.105-129
91.1/4	April 1948	Nose wheel compartment	x					III	91.106-125
91.1/5	April 1948	Fuselage, tightening	x					III	91.102-125
91.1/6	April 1948	Landing gear control	x					III	91.102-129
91.1/7	Sept 1948	Fin attachment	x					II	91.101-148
91.1/8	Jan 1951	Mod. accord to CAR	x					III	91.101-148
91.1/9B	Aug 1952	Firewall reinforcement	x					III	91.101-148
91.1/10	May 1953	Clear view panel						III	91.202-215
91.1/11	Aug 1953	Engine cowling		x				III	91.201-252
91.1/12	March 1955	Nose wheel compartment	x					IV	91.101-148
91.1/13	April 1955	Hood bearing		x		x		IV	91.201-320
91.1/14	Jan 1959	Stiffening of pedal bracket	x	x	x	x		IV	91.101-346
91.1/15	Febr 1959	Reinforcement of tank support		x	x			III	91.201-309  91.321-345
91.1/16	Nov 1959	Nose wheel casing	x	x	x	x	x	IV	91.101-374

 
 

Bulletin       Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft Conserned
91.2500/1	Oct 1947	Nose gear locking mechanism	x					III	91.102-116
91.2/1	Dec 1947	Main wheel hub	x					III	91.105-132
91.2/2	June 1948	Nose wheel fork	x					III	91.102-148
91.2/3	Jan 1954	Main gear brake unit		x				III	91.201-276
91.2/4	Jan 1954	Nose wheel fork, friction surface	x	x				III	91.102-273
91.2/5	June 1954	Main wheel brake unit		x				IV	91.101-148, 91.201-253
91.2/6	June 1954	Main gear hub	x	x					91.101-148       91.201-253
91.2/7	March 1955	Safe-T-Tires	x	x		x		IV	91.101-320
91.2/8	April 1955	Main gear lub, hole		x		x		III	91.201-345
91.2/9D	June 1962	Introducing of Good Year brakes		x	x	x		IV	91.201-345
91.2/10B	June 1958	Introducing of oil nipples for torque links 1/g		x	x	x		IV	91.201-345
91.2/11	Aug 1960	Introduction of sealing at the wheel shaft		x	x	x	x	III	91.201-410
91.2/12	Jan 1961	Main landing gear leg, replacement spring and cam	x	x	x	x	x	IV	All
91.2/13	Aug 1962	Main landing gear. Changed locking between and shaft				x	x	IV	91.310 (*1)        91.347-349
91.2/14	Sept 1963	Retracting mechanism, nose landing gear	x	x	x	x	x	IV	All

  (*1)    And other airplanes with Good Year brakes
 

Bulletin      Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft Conserned
91.3/1	June 1948	Elevator coupling	x					III	91.102-147
91.3/2	Nov 1949	Stabilizer rear bracket	x					II	91.101-148
91.3/3	Oct 1958	Reinforcement of rudder ribs	x	x	x	x		IV	91.101-345
91.3/4	Jan 1960	Intr of rudder trim control		x	x	x	x	IV	91.201-366       91.385-394
91.3/5	April 1970	Improves fastening of the rudder trimweight	x	x	x	x	x	II	All

 
 

Bulletin      Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft Conserned
91.4100/1	Nov 1947	Cables run off securing	x					III	91.102-132
91.4/1	May 1948	Nose gear cables	x					III	91.102-116
91.4120/1	Nov 1947	Pedals	x					III	91.102-132
91.4120/2	April 1953	Pedals cotterpin	x					III	91.101-148
91.4/2	June 1954	Landing gear indicator		x				III	91.201-275
91.4/3B	Oct 1957	Centre box cover		x		x		III	91.201-320
91.4/4	Nov 1954	Wing flap control		x		x		III	91.201-289
91.4/5	Sept 1955	Land gear control link	x	x		x		III	91.101-148      91.201-320
91.4/6	Dec 1955	Improved controls		x		x		IV	91.201-320
91.4/7B	Aug1963	Oil system, Introducing of non-return valve and modification of valve set					x	III	91.310, 91.347-384, 91.409-444
91.4/8	Febr 1961	Replacement of oil line, oil cooler					x	IV	91.308, 91.310, 91.347-384      91.409-426

 
 
 

Bulletin      Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft Conserned
91.5/1	April 1951	Outer wing riveting	x					III	91.101-148
91.5/2	Febr 1955	Intr of screws in leading edge spar		x				III	91.201-299
91.5/3E	May 1966	Repair of wing skin	x	x				IV	91.101-309
91.5/4	Aug 1960	Introducing stop for secondary bolt, wing joint fitting	x	x	x	x	x	IV	91.101-408
91.5/5	Jan 1962	Introducing of extra rivet in stiffener, wing upper side			x	x	x	III	91.321-432 (*2)      91.439

(*2) With wing manuf. No 501-583,585-615 LH and RH
 

Bulletin      Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft Conserned
91.6/1	March 1948	Exhaust collector	x					III	91.104-127
91.6/2	May 1948	Carburetor air intake	x					III	91.104-125
91.6/3	Febr 1948	Intr leather bag	x					III	91.102-129
91.6/4B	April 1949	Engine rocker box bolts	x					III	91.102-148
91.6/5	Nov 1948	Oil tank suspension	x					III	91.101-148
91.6/6B	March 1950	Intr of oil cooler	x					IV	91.101-148
91.6/7	May 1949	Exhaust collector	x					II	91.101-148
91.6/8	Jan 1954	Engine mounting		x				III	91.201-272
91.6/9	Jan 1955	Cabin ventilating		x				IV	91.202-286
91.6/10C	Dec 1957	Hartzell propeller with dural blades		x		x		III	All
91.6/11	April 1955	Exhaust manifold flange		x		x		III	91.201-320
91.6/12	April 1956	Generator coupling		x		x		III	91.201-320
91.6/13	April 1956	Engine coupling oil pump shaft		x		x		III	91.201-320
91.6/14	Dec 1956	Manifold pressure connection		x		x		IV	91.201-231
91.6/15B	Oct 1958	Application of rubber lining on blades		x	x	x		III	All
91.6/16E	Oct 1965	25 Amp generator and new coupling		x	x	x		IV	All
91.6/17B	Aug 1958	Intr propeller governor		x	x	x		IV	All
91.6/18	March 1960	Bushing for plastic blade props		x	x	x		IV	All
91.6/19B	Dec 1960	Repair of exhaust pipe		x	x	x		IV	All
91.6/20	Jan 1961	Change of 25 Amp generator for 40 Amp					x	IV	Applies only to Finland
91.6/21		Not yet issued
91.6/22	Aug 1962	Modification of heat exchanger					x	IV	91.310 91.347-384     91.409-439
91.6/23	June 1965	Intr of 50 Amp generator					x	IV	91.347-366     91.409-418

 
 

Bulletin      Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft Conserned
91.8/1	Nov 1947	Replacement of antenna mast	x					III	91.104-115
91.8/2	Jan 1948	Replacement of tachometer	x					III	91.103-132
91.8/3	Aug 1948	Fuel gauge	x					III	91.117-147
91.8/4	Oct 1948	Voltage regulator insulating	x					III	91.102-147
91.8/5	Oct 1948	Fuel gauge	x					III	91.102-148
91.8/6	Jan 1955	Radio noise suppressors						III	91.202-286
91.8/7	Dec 1955	Voltage regulator insulating		x		x		III	91.201-314

 
 

Bulletin      Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft Conserned
91.9/1	Sept 1948	Cap dualcontrol stick	x					III	91.102-130
91.9/2	April 1955	Safety belts						III	91.202-286
91.9/3	Dec 1961	Replacement of bolt assembly for lap strap front seats	x	x	x	x	x	IV	91.101-432     91.439

                                                                                       SAAB Service Bulletins are distributed in order to inform operators
                                                                                       about checking, maintenance and or minor changes.

Table 2.    Service Bulletins
 

Bulletin      Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft Conserned
91.0.001	Issue 10    Dec 2000	Index of SAAB Modification and Service Bulletins (This Index is NOT correct.)	x	x	x	x	x		All

 
 

Bulletin      Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft Conserned
91.1.001	May 1957	Introduction of access holes in the front floor panels and in the pedal support	x	x	x	x		IV	91.101-345
91.1.002	Dec 1960	Lock pins for front seat buckets	x	x	x	x	x	III	91.101-426
91.1.003	Issue 2    March 1979	Superseeded by 91.1.005		x	x	x	x		All
91.1.004	Issue 2    Sept 1982	Inspection of elevator spar. Damage to elevator spar at bearing assembly attachment		x	x	x	x	I	All
91.1.005	Rev 2    Dec 1993	Possibility of fatigue failure in specific joints on aircraft with a considerable amount of flying hours		x	x	x	x	I	All
91.1.006	Rev 1    Aug 1996	Inspection of U-profiles in main spar of fuselage for corrosion and removal of damages that may be revealed	x	x	x	x	x	I	All

 
 

Bulletin      Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft Conserned
91.2.001	Dec 1957	Introduction of improved type of oilring in main and nose landing gear		x	x	x		II	91.201-345
91.2.002	June 1958	Cementing of brake linings	x	x	x	x		III	91.101-148    91.201-345
91.2.003	April 1960	Tool for disc clips on Goodyear brake		x	x	x	x		All
91.2.004	Nov 1960	Oversize bolt for landing gear torsion links	x	x	x	x	x	II	All
91.2.005	July 1961	Replacement of straight oil nipple with elbow oil nipple at upper torsion link bolt of nose gear		x	x	x	x	III	A/C with M.B. No 91.2/10 introduced or manuf. No.     91.310,    91.346-432 and    91.439
91.2.006	April 2000	Inspection of installation for operating and locking of the main landing gear	x	x	x	x	x	I	All

 
 

Bulletin      Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft Conserned
91.3.001	May 1956	Superseeded by 91.1.005	x	x		x		II	91.101-148, 91.201-320

 
 

Bulletin      Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft Conserned
91.4.001	July 1957	Checking of pin in landing gear locking mechanism	x	x	x	x		II	91.101-345
91.4.002	Nov 1980	Inspection of components in flight control system		x	x	x	x	I	91.201-474
91.4.003	Febr 1986	Inspection of fuel handpump actuating system		x	x	x	x	I	All

 
 

Bulletin      Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft Conserned
91.6.001	April 1956	Checking of carburetor	x					III	91.101-148
91.6.002B	Aug 1959	Modification of Marvel-Schebler carburetor		x	x	x		IV	91.201-329
91.6.003	April 1957	Checking the tightening torque of the crankshaft thrust bearing nut		x	x	x		III	All
91.6.004	April 1957	Supplementary instructions for inspection of the propeller		x	x	x		I	All
91.6.005	April 1957	Dividing of LH and RH baffle plates in engine cooling system		x		x		IV	91.201-320
91.6.006	Nov 1957	Magneto Bendix-Scintilla SF6LN-8		x	x	x		IV	All
91.6.007	Nov 1957	Carburetor Marvel-Schebler MA-4-5		x	x	x		IV	All
91.6.008	Nov 1957	Removal of engine baffle lugs		x	x	x		III	All
91.6.009	Dec 1957	Inspection of metal propeller blades		x	x	x		I	All
91.6.010	Febr 1958	Exchange of metal propeller blades for plastic blades		x		x		IV	All
91.6.011B	June 1959	Rework of aluminium propeller blades		x		x		I	All
91.6.012B	Sept 1958	Renewal of rubber linings on plastic blades		x	x	x		I	All
91.6.013	June 1958	Reaming of plastic blades		x	x	x		III	All
91.6.014	July 1958	Tolerances for plastic blades		x	x	x		IV	All
91.6.015	June 1959	Increased overhaul period for Hartzell props		x	x	x		IV	All
91.6.016	June 1959	Tolerances for Hartzell propellers		x	x	x			All
91.6.017B	Febr 1961	Exchange of sealings in aux fuel pump		x	x	x	x	I	All
91.6.018	Oct 1960	Alternative crankcase breather line					x	IV	All
91.6.019	March 1961	Adjustment of Constant-Speed Propeller Governor		x	x	x		IV	With propeller governor
91.6.020	Aug 1964	Check of generator coupling		x	x	x		III	With generator coupling 1038140
91.6.021	Dec 1969	Inspection of engine mount					x	II	All
91.6.022	April 1994	Superseeded by 91.6.023		x		x		I	91.202, 91.206, 91.215, 91.218, 91.221, 91.237, 91.247-250, 91.254, 91.255, 91.257, 91.269-271, 91.275, 91.280, 91.283, 91.285, 91.395-400, 91.403, 91.404, 91.406-408
91.6.023	6 July 1999	Inspection and replacement of crankshaft front thrust bearing		x		x		I	91.202, 91.206, 91.215, 91.218, 91.221, 91.237, 91.247-250, 91.254, 91.255, 91.257, 91.269-271, 91.275, 91.280, 91.283, 91.285, 91.395-400, 91.403, 91.404, 91.406-408

Table 3.    Instructions
 

Bulletin       Number	Date	Subject	91A	91B	91 B-2	91C	91D	Urgency	Aircraft conserned
TSP37- 96.106	Aug 1996	Instruction, Fabric on Wings and Control surfaces	x	x	x	x	x		All

This index and Service Bulletins are only for information,
for the latest editions you must contact SAAB Aerospace or your local Aviation Authority.
The Bulletins may be in a different size compared to originals.
 

If you have any comments, corrections, requests or suggestions please contact Leif Pettersson !