Date: 8/20/63 Models: Bee Dee M-4, M-4 Serial #: 3-15 Re: Baggage straps & placard
| Date: Not Available Models: Bee Dee M-4, M-4, M-4-210 Serial #: 3-55 Re: Balance weight elevator
| Date: 1/10/64 Models: M-4 Serial #: 3-46 Re: Binding & brake locking
| Date: 7/21/64 Models: M-4 Serial #: 46 and up Re: Flight manual
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| SERVICE LETTER #5 Date: 8/25/64 Models: M-4 Serial #: 68-77 Re: Forward seat stop
| SERVICE LETTER #6 Date: 11/18/64 Models: M-4-210 Serial #: 1001-1005 Re: Fuel system placards
| SERVICE LETTER #7 Date: 6/15/65 Models: M-4-210 Serial #: 1001-1035 Re: Fuel system starvation
| SERVICE LETTER #8 Date: 7/27/65 Models: Bee Dee M-4, M-4, M-4-210 Serial #: Bee Dee M-4 (3-14), M-4 (15-86), M-4-210 (1001-1028) Re: Loose fabric at windshield |
| SERVICE LETTER #9 Date: 11/8/65 Models: Bee Dee M-4,M-4,M-4-210 Serial #: 3-14 (Bee Dee M-4), #15-94 (M-4), #1001-1050 (M-4-210) Re: Elevator trim control | SERVICE LETTER #10 Date: 11/24/65 Models: M-4-210 Serial #: 1002,1003,1005,1006,1008-1014, 1016,1017,1019-1021,1023-1027,1030,1031,1033 Re: Cracking engine mount tubes | SERVICE LETTER #11 Date: 2/11/66 Models: M-4, M-4210, M-4210C Serial #: 3-15, 16-91, 1001-1043, 1001C-1010C Re: No smoking placard | SERVICE LETTER #12 Date: 8/24/66 Models: M-4, M-4C, M-4S, M-4T Serial #: 3-94, 1C, 2S, 1T Re: Oil cooling kit
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| SERVICE LETTER #13 Date: 8/29/67 Models: M-4, M-4C, M-4T, M-4S, M-4-210, M-4-210C, M-4-220C, M-4-220S Serial #: 68-94, 1C-10C, 1T-3T, 1S-3S, 1001-1045, 1001C-1062C, 2001C-2004C, 2001S Re: Fuel line plate | SERVICE LETTER #14 Date: 2/19/68 Models & Serial #'s: M-4 (3-94), M-4C (1C-10C), M-4S (1S-3S), M-4T (1T-3T), M-4-210 (1001-1045), M-4-210C (1001C-1064C), M-4-220S (2001S), M-4-220C (2001C-2006C) Re: Rubber trim tab hinge mod. | SERVICE LETTER #15 Date: 11/12/68 Models: M-4-210 Serial #: M-4-210 (1001-1045, M-4-210C (1001C-1074C, 1079C-1080C) Re: Gross weight modification
| Date: 8/20/63 Models: 220 Series with #5106 alternator Re: Alternator switch
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| SERVICE LETTER #17 Date: 6/4/69 Models: M-4-C, M-4-210C, M-4-220C Serial #: 11C, 1066C, 1067C, 1071C, 1074C, 1075C, 1079C, 2012C, 2016C, 2018C-2025C Re: Flap aileron hinge bracket crack | Date: 9/29/69 Models: M-4-220C & 220S Serial #: 2001C-2025C, 2001S Re: Throttle Linkage attachment malfunction
| Date: 9/4/69 Models: M-4, M-4-210, M-4-220S,T&C, M-4-1T-3T Serial#: 1C-11C, 3-94, 1S-3S, M-4-210 (1001-1045, 1001C-1075C, 1079C, 1080C), M-4-220 (2001C-2029C, 2032C, 2001S) Re: Lower control column pulley | Date: Not available Models: M-4 Serial #: 4 - 91 Re: Engine mount cracks
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| SERVICE LETTER #21 Date: 2/18/71 Models: M-4-180C, M-4-220C Serial #: M-4-180C (3001C-3004C), M-4-220C (2044C-2060C) Re: Bucket seats out of track
| SERVICE LETTER #22 Date: 5/10/81 Models: M-4-180, M-4-220 Serial #: M-4-180 (3001C-3003C), M-4-220 (2001C-2068C) Re: Electrical system
| SERVICE LETTER #23 Date: 7/9/71 Models: M-4-180, M-4-220 Serial #: M-4-180 (3001C-3005C), M-4-220 (2001C-2070C) Re: Fuel System
| Date: 5/14/73 Models: M-4-180C, M-4-220C/S Serial #: 3001C-3006C, 2001S, 2001C-2126C, 2129C, 2175C, 2177C Re: Franklin engines |
Date: 6/26/74 Models: M-5-210C, M-5-220C Serial #: M-5-210C (6001C-6014C, 6039C, 6043C-6045C), M-5-220C (5002C,5019C,5020C,5022C-5024C) Re: Cooling mod. for M-5 planes Edo float equipped | Date: 9/16/77 Models: M-5-210C, M-5-220C Serial #: M-5-210C (6001C-6050C), M-5-220C (5001C-5037C) Re: Clearance between prop & throttle controls & control column chain
| Date: 8/20/74 Models: M-4-220, M-5-220 Serial #: M-4-220 (All) M-5-220 (5001C-5024C) Re: Right side exhaust system hangar brace
| Date: Not available Models: M-4-210, M-4-210C, M-5-210C Serial #: M-4-210 (1001-1045), M-4-210C (1001C-1117C) M-5-210C (6001C-6069C, 6072C, 6077C,6079C,6084C,6087C) Re: Fuel injector return line |
Date: 7/75 Models: M-4-220C Serial #: 2120C and other retrofitted with aux. fuel tanks, M-5-210 (6001C-6108C {except 6070C}, 6071C, 6078C, 6089C, 6093C, 6098C-6101C, 6103C-6105C), M-5-220C (5002C-5057C) Re: Quick drains for aux. fuel tank sumps
| Date: 10/8/75 Models: M-4-210, M-5-210C Serial #: M-4-210 (All), M-5-210C (6001C-6085C) Re: Exhaust manifold cracking
| Date: 10/20/76 Models: M-5-235C Serial #: 7002C-7018C,7020C, 7022C-7026C,7028C Re: HC-C2YR-1BF/F8468A-62 propeller low pitch stop setting
| Date: 1/7/77 Models: M-5, M-5-235C Serial #: M-5 (6113C-6122C, 6126C, 6129C, 6130C, 6132C, 6136C, 6138C, 6142C, 6149C, 6156C, 6159C, 6161C, 6166C, 6171C, 6173C, 6178C) M-5-235C (7007C, 7008C, 7010C, 7016C-7018C, 7020C, 7023C-7025C) Re: Questionable flammability of burgundy upholstery fabric |
Date: 4/27/77 Models: M-5-235C Serial #: 7001C-7026C, 7030C-7032C, 7037C Re: Revised center of gravity & C.G. envelope
| Date: 2-25-77 Models: M-5-210C, M-5 Serial #: M-5-210C (6182C-6193C), M-5 (7024C-7070C) Re: Aileron pulley retaining washers
| Date: 3-4-77 Models: M-5-235C Serial #: 7073C-7073C, 7085C Re: Possible float plane reinforcement deficiency
| Date: 5-10-78 Models: M-5-210C, M-5-235C, Serial #: M-5-210C (6190C-6204C) M-5-235C (7061C-710C, 7163C-7167C, 7169C-7192C, 7194C, 7197C Re: Possible collapsed fuel lines
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8/20/63 Models: All M-5 models; 5000C, 6000C, 7000C Serial #: 5057C, 6204C, 7219C Re: Flap placard
| Date: 11/3/78 Models: All M-5 models; 5000C, 6000C, 7000C Serial #: 5057C, 6204C, 7219C Re: "Razorback" decal
| Date: 1-15-80 Models: M-4-210, M-4-210C Serial #: M-4-210 (1001-1045 M-5-210C 91001C-1085C Re: Engine replacement
| Date: 8-10-81 Models: M-5-235C Serial #: 7001C-7320C, 732C-7346C, 7348C, 7349C Re: Modification for gross weight increase
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Date: 8/10/81 Models: M-5-235C Serial #: 7001C-7320C, 7322C-7346C, 7348C-7350C, 7352C-7362C, 7364C-7367C Re: New flap ratchet | Date: 8-25-82 Models: M-5-210C Serial #: 6001C-6202C Re: New flap ratchet
| Date: 7/20/82 Models: M-5-210C Serial #: 6001C-6206C Re: New flap ratchet
| Date: 9/14/82 Models: M-5-210TC Serial #: 9001C-9010C Re: New flap ratchet
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Date: 3-10-83 Models: M-5-220C Serial #: 5001C-5057C Re: New flap ratchet
| Date: 3/10/83 Models: M-5-180C Serial #: 8001C-8022C Re: New flap ratchet
| Date: 3/16/83 Models: M-4-180C Serial #: 3001C-3006C Re: Engine replacement
| Date: 5/3/83 Models: M-5-220C Serial #: 5001C-5057C Re: Modification of gross weight increase |
Date: 6/21/83 Models: M-5-235C, M-6-235 Serial #: M-5-235C (7104C, 7121C-7355C, 73576C-7376C M-6-135 (7249C, 7356C, 7379C-7434C Re: New alternator control system | Date: 8/7/83 Models: M-4-220C Serial #: 2001C-2190C Re: Engine replacement
| Date: 9/12/94 Models: M-5-235C Serial #: All Re: Flight manual supplement #22
| Date: 5/91 Models: All models Serial #: All Re: Elevator control cable system turnbuckle
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Date: 2/19/93 Models: All models prior to 6-91 with Lycoming 0-360-C1F or 0-540-J1A5D engines Re: Carburetor heat air valve | Date: 6/27/94 Models: M-4-210, M-4-210C, M-5-210C models with Continental I0-360 engines Serial #: 3-15 Re: Fuel shutoff valve | Date: 10/21/98 Models: All models Re: Wing lift struts
| Date: 9/1/99 Models: All models M-5 and up Re: Horizontal stabilizer struts, lower strut attach stub tubes and attaching hardware
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Date: 3/9/84 Models: M-5-180C Serial #: 8001C-8014C, 8016C-8019C, 8012C Re: New alternator control system
| Date: 7/8/99 Models: All models prior to 6/99 Re: Attach hardware for all doors
| Date: 8/24/99 Models: MXT-7 & MT-7 Re: Nose gear and steering yoke attachment
| Date: 12/7/99 Models: All models with bucket seats Re: Adjustable front bucket seats
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Date: 6/20/02 Models: M-4, M-5, M-6, M-7, MXT-7, MT-7, M-8 prior to 3/28/02 Re: Forward elevator control bellcrank cable shackle
| SERVICE LETTER #66 Date: 8/05/05 Models: MXT-7-180, M-8-235, MXT-7-160, MT-7-235, MXT-7-180A, M-7-235C, MT-7-260, MX-7-180C, M-7-420AC, M-7-260C, MX-7-180AC, MX-7-160C Re: Attach bolts for spring gear and trigear models
| SERVICE LETTER #67 Date: 12/16/05 Models: All Maule models equipped with Vortex Generators manufactured between 3/97-10/05 Re: Micro AeroDynamics Vortex Generator System Placard and AFM Supplement
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