Bulletin#	Subject	Model	Serial #
37	Secondary Windings on Composite Blades	7690 and 7890	All
36	Rudder Cable Assemblies	S-2, S-2E, S-2A	All
35	Mounting Kit for Composite Spinner	S-2C	6074-6088
34	Fuel Flop Tube Hose Assembly	S-1, S-2	All
33	RSA-5 or RSA-10 series Fuel Injector Servos	S-1, S-2	All
32	Aileron Cove Fabric Retention Strips	S-2C	All
31	Propeller Accumulator	S-2B, S-2C	6001-6041
30	Changing fuel valves from Imperial 104HD to Apollo 76-101	S-2C	All
29	Elevator Forward Control Rod	S-2C	All
28	LANG D-501A Tailwheel Assembly Usage	S-2A, S-2B, S-2C	All
27	Upper Wing Fabric, Pitts S-2B only	S-2B	5260-5340
26	Throttle and Cowl Flap Control Cables	S-2B	5286 and up
25	Rear Lower Fuselage Wing Fittings	S-2B	All
24	Fuselage Upper Longerons	All	All
23	Control Stick	S-2A	All
22	(A) Fuel Flop Tube Hose Assy (B) Fuel Sight Guage Tube	All	All
21	Manifold Absolute Presssure Line Re-route	S-2B S-2S	5001-5269 3000-3018
20	Ammeter Function	S-2B, S-2S	All
19	Oil Breather Line	All	All
18	Wing Fabric-Cotton Recover to Dacron Rib Stitching	All	All Prior to 08/1987
17	Christen Stick Grips on Pitts Aircraft	All	All Prior to 02/1989
16	Oil Cooler Installation	S-2B	5001-5079
15	Elevator Control Stick	S-2S	1000-1014, 3000-3012
14	Horizontal Stab. Support Tube	S-1S	0001-0060
13	Aileron Stop Bolt	S-1S	0001-0054
12	Gel/Cell Battery Installation	S-1S	0001-0054
11	Fiberglass Battery Box	S-1S	0032-0049, 2101-2115
10	Cracks in Streamline Tubing	S-1S	0032-0049
9	Rudder Cable Plate	S-1S	All
8	Upper Wing L.E. Ribs	S-1S	0001-0025
7	Adds Strut to Stab. L.E.	S-2A	0001-0025
6	Horizontal Stab. Support Tube	S-2A	2001-2030
5	Aileron Interconnect Tube	S-2A	2001-2025
4	Upper Aileron Hinge Bracket	S-2A	2001-2090
3	Concerns propeller blade failure	S-2A	2001 and UP
2	Freezing of Engine Breather	S-2A	2001-2014
1	Engine Oil Temperatures	S-2A	2001-2005

Service Letters

Letter#	Subject	Model
15	Kit Available for the S-2B & S-2C Smoke System	S-2B S/N 5000 and up S-2C S/N 6000 and up
11	Pitts S-2A & S-2B Shoulder Harness Optional Installation	S-2S S/N 1000-1014 S-2A S/N 3000-3023 S-2B w/ shldr hrnss att to seatback
10	Brake Line Inspection	All Models & S/N Improper rigging)
9	Elevator trip tab travel	S-2A S/N 2001-2114
8	Elevator horns (cracks)	S-2A S/N 2001-2114
7	Vapor lock IO-360-A1A	S-2A All
6	Brake Hydraulic Line Clearance	S-2A All S-1S All
5	Control Tube Assy (Cracks)	S-2A All
4	Upper Aileron to Hinge Bracket	S-2A S/N 2001-2090
3	(12-22-73) Upper Wing Spar to Cabane Fitting	S-2A S/N 2001-2070 (2-26-74)
2	(12-06-73) Upper wing spar to cabane fitting (6-26-73) Alternate air heat box flapper door	S-1 S/N 1-001-1-0017 (2-26-74) S-2A S/N 2001-2059
1	Brake Hydraulic Line Leakage	S-2A S/N 2001-2024

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Pitts Service Bulletins

Service Letters