SERVICE BULLETIN #1

Date: 5/3/79

Models: M-4, M-5

Serial #: M-4 (4-94, 1001-1045, 1S-3S, 1T-3T, 1C-11C; M-4-210C (1001C-1117C); M-4-220S (2001S); M-4-220C (2001C-2190C); M-4-180C (3001C-3006C); M-5-220C (5001C-5057C); M-5-210C (6001C-6206C); M-5-235C (7001C-7283C); M-5-180C (8001C-8004C); M-5-210TC (900AC)

Re: Horizontal tail to fuselage front attach tubes

SERVICE BULLETIN #2

Date: 3-15-81

Models: BM-4, M-5

Serial #: M-4 (4-94, 1001-1045, 1S-3S, 1T-3T, 1C-11C; M-4-210C (1001C-1117C); M-4-220S (2001S); M-4-220C (2001C-2190C); M-4-180C (3001C-3006C); M-5-220C (5001C-5057C); M-5-210C (6001C-6206C); M-5-235C (7001C-7283C); M-5-180C (8001C-8004C); M-5-210TC (900AC)

Re: Balance weight elevator

SERVICE BULLETIN #3

Date: 116-81

Models: M-5 equipped with fuel injected IO-540-W engines

Serial # : M-5 (7322c, 7350c, A7354C, A7355C, A7358C, A7360C, A7361C, 7364C, 7365C, A7366C, A7367C); M-6-235 (7356C, 7379C, 7380C, 7382C-7388C, 7390C

Re: Alternator air intake hose

SERVICE BULLETIN #4

Date: 8/19/82

Models:  M-6-235

Serial #: 7421C-7429C, 7431C, 7432C

Re: Installation of Canadian Aircraft Products floats, Model 62-2000

Date: 10-21-84

Models: M-4, M-4-210, M-4-220C, M-4-220S, M-4-180C, M-5-220C, M-5-210C, M-5-235C, M-5-180C, M-6-210TC

Serial #: M-4 (4-4, 1S-3S, 1T-3T, 1C-11C); M-4-210 (1001C-1117C); M-4-220C (2001C-2190C); M-4-220S (2001S); M-4-180C (3001C-3006C); M-5-220C (5001C-5057C); M-5-210C (6001C-6206C); M-5-235C (7001C-7393C); M-5-180C (8001C-8019C); M-6-210TC (9001C-9010C)

Re: Quick drains for main fuel tanks.

Date: 12/15/83

Models: Models equipped with aux. fuel vent line check valves only; M-5-180 (8004C-8014C,8016C-8019C); M-6-180 (8020C); M-5-200 (8022C); M-5-210TC (9001C-9010C); M-5-235C (7290C-7355C, 7357C-7376C, 7451C); M-6-235 (7249C, 7356C, 7379C-7432C, 7434C-7443C, 7446C-7450C, 7453C-7455C, 7458C); M-7-235 (4002C, 4007C, and all aircraft retrofitted with aux. fuel line tank vent line check valves per Service Aid #1

Re: Auxiliary gas tank vent line check valves.

Date: Not available

Models: Models equipped with 20°/40° flap ratchet retrofitted per Service Letters #44, #46, #48 or #49, M-5 -220C (5001C-5057C); M-5-210C (6001C-6206C; M-5-235C (7001C-7045C, 7047C-7052C); M-5-180C (800AC-8014C, 8016C-8019C, 8021C); and includes any M-5 series airplane with this modification where the fuel crossover supply line routes between flap control handle and fuselage seat support frame in area where flap control handle travels

Re: Fuel crossover supply line located forward of and under front seats.

Date: 4/17/91

Models: M-7-420, MX-7-420

Serial #: M-7-420 (12001C & 12002C); MX-7-420 (13001-13003C)

Re: Panel light dimmer controls.

Date: 6/11/92

Models: All models

Re: Elevator control cable attachments.

Date: 9/16/94

Models: M-4-210, M-4-210C

Serial #: M-4-210 (1001-1045); M-4-210C (1001C-1080C)

Re: Relocation of gascolator & electric fuel pump when M-4-210 and early M-4-210Care equipped with dual exhaust system 5230F.

Date: 10/39/95

Models: All models

Re: Wing lift strut assembly inspection / replacement.

Date: 10/9/98

Models: All except M-4, M-4-C,

M-4C, M-4S, M-4T, M-4-180,

M-4-4210, M-4-210C, M-4-220C,

M-4-220S

Re: Aileron control cables.

Date: 3/16/98

Model:  All M-4's, M-5's, M-6's,

MX-7's, MST-7's, MT-7-235's, M-8's, M-7-235 A/B's

Re: Forward rudder control cables.

Date: 2/16/98

Models: Models with Lycoming

0-360-C1F, 0-360-C4F & 0-320-B2D engines - M-5-180C,

M-6-180, MX-7-180, MX-7-180A, MX-7-180B, MX-7-160,

MXT-7-180, MXT-7-180A,

MXT-7-160 manufactured prior to 4/95

Re: -60/-180 fuel pressure gauge hose installation.

SERVICE BULLETIN #16

Date: 3/7/96

Models: Models manufactured prior to 1996 with Lycoming 0-360-C1F, 0-360-C4F, 0-320-B4D,

0-540-J1A5D, 0-540-J3A5 &

0-540-B4B5 engines

Re: Carburetor heat air valve.

Date: 6/28/96

Models: All M-4's, M-5's, M-6's,

MX-7's, MXT-7's, MT-7-235's,

M-7-235/A/B's, M-8's

Re: Fuselage tubes located near forward rudder control cables.

SERVICE BULLETIN #18

Date: 3/20/97

Models: All M-4's, M-4S's, M-4T's, M-4C's (S/N 33-94 1S-3S, 1T-3T, 1C-11C), M-4-180C (S/N 3001C-3006C)

Re: Auxiliary fuel tanks in model M-4 (145 hp) & M-4-180C airplanes.

SERVICE BULLETIN #19

Date: 8/27/98

Models: Any aircraft which uses Maule TW-23 tire assembly that has replace the tire with a new tire after 5/5/97.

Re: Inspection/replacement of Maule p/n TW-23, 6:50x2:50 tire assembly that was purchased after 5/5/97.

SERVICE BULLETIN #20

Date: 12/27/99

Models: All models

Re: Nicropress sleeves on control cables.

Date: 3/24/03

Models: M-4-180C, M-4-220C, M-4-220s, M-5-220C

Serial #: M-4-180C (3001C-3006C); M-4-220C (2001C-2190C); M-4-220S (2001S); M-5-220C (5001C-5057C)

Re: Introduction of PLL-7 fuel pump and new fuel pump drive for Franklin engines, models 6A-335-B1A, 6A-350-C1 and 6A-350-CIR.

Date: 1/26/04

Models: MXT-7-180 (S/N 14001C, 14095C, 14096C, 14099C, 14100C, 14102C-14104C); MXT-7-235 (S/N 18042C, 18046C, 18048C, 18050C-18052C, 18056C, 18058C, 18081C); MXT-7-180A (S/N 21061C, 21068C, 21071C, 21074C-21076C, 21084C-21086C); M-7-235B (S/N 23056C, 23058C, 23073C); M-7-235C (S/N 25025C, 25056C, 25059C, 25064C, 25079C);

M-7-260 (S/N 26005C, 26101C, 26014C);

MT-7-260 (S/N 27002C, 27004C, 27006C, 27007C); MX-7-180C (S/N 28012C-28014C);

M-7-260C (S/N 30005C, 30011C-30013C, 30015C, 30018C, 30026C);

M-7-420A (S/N 35001C)

Re: Possibility of in-flight electrical fire.

Date: 5/20/04

Models: M-4-210 all with dual exhaust, M-4-220 all, M-4-180 all, M-5 all except M-5-210 with single exhaust and M-5-200, M-6 all, MX-7 all except M-7-420, M-8 all, MXT-7 all, MT-7 all

Re: Possible separation of the exhaust tailpipe from the muffler. Concerns are overheating of firewall components and fire.

SERVICE BULLETIN #24

Date: 6/7/04

Models: All Maule Models

Re: Possible cracking of the brackets welded on the fuselage frame which support the brake cylinders. These brackets are located in line with, just forward of, and below the rudder pedals.

Date: 8/13/04

Models: All Maule Models Delivered From The Factory Between June23, 2003 And August 1, 2004

Re: Elevator trim tabs or hinges shipped from the factory during this period should be inspected in accordance with this Service Bulletin.

SERVICE BULLETIN #26

Date: 6/14/05

Models: All Maule Models with swing out windows installed.

Re: Swing out windows.

Date: 3/13/06

Models: M-7-420, MX-7420, M-7-420AC,

M-7-420A, MT-7-420

Re: Possible fuel leakage from the (Fuel System) Header Tank; Header Tank Vent Installation.

MANDATORY

Date: 5/24/07

Models: All Maule models certificated from January 1, 2004 to May 1, 2007.

Re: Turnbuckle Rod Eye End Bushings of the Flap Control Mechanism omitted on some of the above listed aircraft.

MANDATORY

Date: 3-4-08

Models: All Maule models manufactured up to 12/07/07

Re: elevator Cable Connections.

MANDATORY

Date: 5/8/09

Models: All models manufactured up to September 7, 2009 except all M-4-(-145)'s and M-4C/S/T.

Re: Cargo compartment load testing conducted in the 60's was not done to high enough loads.

MANDATORY

Date: 1/11/10

Models: M-4C (S/N 1C-11C), M-4S (S/N 1S-3S), M-4T (S/N 1T-3T)

Re: Baggage compartment loading limits.

MANDATORY

Date: 7/11/05

Models: Any Lycoming engine model specified in this bulletin manufactured, rebuilt, overhauled or repaired after March 1, 1999.

Re: Crankshaft Replacement in Lycoming Engines.