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Floats Service Letters

Select Float Model to View Only Service Letters for that Model:
OR Select an Aircraft Model to View Only Applicable Service Letters:
No. Description A/C or Float Model Serial numbers Rev Date
1 Hyd. motor circuit breakers 6000A - Beaver MKI, MKIII 60001-60006,60011,60012 4/26/1983
2 Main gear up-stop adjustment 6000A - Beaver MKI, MKIII 60001-60006, 60011-60014 4/26/1983
3 Nose gear trolley-roller interconnect 6000A - Beaver MKI, MKIII 60001-60012, 60015,60016 4/26/1983
4 Hyd. system pressure relief valve 3730, C185, C206, 6000A - Beaver MKI, MKIII 0-37614, 0-60030
5 Center of gravity limits C206 per STC SA18GL Thru 37614 or inst. prior to 11-29-83 11/29/1983
6 5A3-399 bush insert in aft end of main gear slide tube 6000A - Beaver MKI, MKIII 60001-60038 8/15/1984
7 Main gear oleo shock strut 6000A - Beaver MKI, MKIII 60001-60044 12/26/1984
8 Link-nose gear truck to ram 6000A - Beaver MKI, MKIII 60001-60054 11/25/1985
9 Installation of diode for protection of hyd. pressure switch 3730 - C185, C206, 6000A - Beaver MKI, MKIII 37636 & down 60050 & down
10 Install placard, "Flammable Liquids Prohibited" 3730, C206, 6000A - Beaver MKI, MKIII 37636 & down, 60050 & down
11 Installation of new electric hyd. pump motor 3730 - C185, C206, 6000A - Beaver MKI, MKIII, 8000A - Caravan 37652 & down, 60078 & down, 80006 & down 6/9/1987
12 Water Rudder Repair 8000, 8750, 10000, 7000, 6000, 6100 87078 & down, 10144 & down B 1/2/2015
13 Hydraulic pump motor All All amphib floats with electric hyd. pump mounted in floats or on firewall 8/4/1987
14 Pump out tube - plastic All All floats with nylon plastic pump out tubes 8/13/1987
15 Hyd. oil contamination in the landing gear hydraulics All All amphibian floats 2/19/1988
16 Pilot and Co-Pilot seat stop relocation Beaver MKI, MKIII Beaver MK I & MK III with pilot and Co-Pilot seats installed per STC SA711GL 10/19/1988
17 Installation of "Seat Locked" warning placard Beaver MKI, MKIII Beaver MK I & MK III with pilot and Co-Pilot seats installed per STC SA711GL 1 8/30/2006
18 Wipare STC SA1311GL (8000 lb. gross weight increase) C208 Caravan with 8000 floats 2080114 & up 10/26/1988
19 Proper engagement of the seat locking mechanism Beaver MKI, MKIII Beaver MK I & MK III with pilot and Co-Pilot seats installed per STC SA711GL 10/27/1988
20 Inspection of fuselage lateral support beam 8000, Caravan C208 Caravan with 8000 floats built before 1-1-90 1/15/1990
21 Installation of AN hardware 4000's on C206 a/c STC SA1483GL 40003-40026
22 Install front brace wire fitting C208 Caravan with 8000 floats 80001-80026, 80029-80034
23 Elevator trim circuit breaker, C208 Caravan with 8000A installed C208 Caravan with King autopilot & 8000A floats installed 9/23/1991
24 Intentionally left blank
25 Reinforcement of Model 4000 float hull bulkheads C206 or C185 with 4000 floats 40001-40016, 40019-40022, 40025-40054, 40057-40060, 40074-75 5/1/1992
26 Retract cylinder-main gear-3730 3730A - C185, C206 B 9/16/2016
27 Reinforcement of glareshield and V-brace 4000 - C206 All 7/21/1992
28 Nose and main gear ram update 4000, 6000, 8000 40072A & down, 60210A & down, 80048A & down 10/10/1992
29 Install tinnermans - access covers 4000,6000,8000 floats All 3/23/1993
30 Install 675 SHP PT6A-114A -C208 Cessna 208 Caravan 2080001 & up 6/6/1993
31 Firewall Modification Cessna 208 Caravan 2080001 & up 1/26/1994
32 Install cover - wheel well 4000 Amphibs All 3/1/1994
33 Conversion of Model 6000 to Model 6100 Beaver MKI, MKIII All 6000 floats installed on Beaver MK III with 6000 lb G.W.increase 9/15/1994
34 Nose gear shimmy info 6000/6100 Amphibs DHC 2 MK I, MK III 12/5/1996
35 Conversion of Model 8000 hull (Cessna 208) to Model 8000 (DHC - 3) hull 8000 floats DHC-3 Otter 1/24/1996
36 Rear strut - aft attachment - Twin Otter DHC-6 Twin Otter Model 300 with 13000 floats 130001-130022 12/4/1996
37 Install oil filter for float hydraulic system DHC-6 Twin Otter Model 300 with 13000 floats All 1/20/1997
38 Revisions or additions to 2100 TSO float 2100 TSO floats 21001-21030 10/13/1997
39 Conversion of 3730 float to 3800 float Cessna 185, 206 N/A 10/23/1997
40 Install Model 2100 float - PA-18 Piper PA-18 with 2100 floats N/A 11/4/1997
41 Install nose wheel plunger 2100/2350 floats 21001,02,07,08,11-14,17-20,25,26, 31,32,35-52,55-68,71-88
23003,04,09-12
7/27/1998
42 Firewall Modification - Plate Caravan 208/ with 8000 floats 20800001 and Up 4/26/1999
43 New Wheel and Brake Assembly 3000, 3450, 6000, 8000 Floats N/A 6/1/2000
44 Firewall Modification - Fitting Lower Firewall Caravan 208/ with 8000 Floats 20800001 and Up 3/24/2000
45 Modification - Main Landing Gear 3450 Floats 34001 - 34032 9/20/2000
46 Modification - Main Landing Gear 3000 Floats 30001 - 30046 9/20/2000
47 Installation of Hinged Access Covers to Float Top Deck 13000 Floats Optional All 13000 Series Floats B 7/15/2010
48 Addition of Hydraulic Accumulator Wipline 2100, 2350, 3000 and 3450 series amphibious floats A 3/15/2006
49 Placard-Floatplane Airspeed Limitations PA-18 Floatplane Float S/N 276 & Down, with 2000 lb Gross Wt Kit 9/4/2001
50 Inspection of aircraft skin rivet head interference, on float cross wire pulls. C206 All model Cessna 206 aircraft on Wipline Model 4000 and 3450 floats. 11/6/2000
51 Modification-Foam filled float Boosters 2100 & 2350 Floats 2100 & 2350 Floats A 7/13/2005
52 Modification - Main Landing Gear 2100 & 2350 Floats 2100 Floats S/N 21232 and lower, 2350 Floats S/N 21032 and lower 4/25/2002
53 Installation - Chinese Baggage placards 8000 Floats 80211A, 80212A, 80213A, 80214A, 80227A, 80228A, 80247A, 80248A 6/3/2002
54 Installation - Shock Strut - Metering Tube 8000 Floats 80244 and DN 6/17/2002
55 Main Landing Gear Shock Strut Replacement 2100A, 2350A Floats 2100A S/N's 21327A, 21328A, Updated, 21344A & DN, 2350A S/N 23046A & DN 2/18/2003
56 Main Landing Gear Shock Strut Replacement 3000A, 3450A Floats 3000A S/N 30094A & DN, 3450A S/N 34084 & DN 11/13/2002
57 Axle - Nose Gear Trolley - Replacement 2100A, 2350A, 3000A, 3450A 2100A S/N's:21412 & DN 10/1/2003
58 208 Seaplane Float Spreader Bars - Heavy Duty 8000 Floats S/N 80230 & DN 10/1/2002
59 Removal of Main Gear Tunnel for Seaplane Floats 13000S Floats All Seaplane Floats 2/17/2003
60 Installation of Pressure Switch Diode 3730 A Floats All 6/16/2003
61 Main Gear Roller Inspection / Torque Arm Replacement 3000, 3450 A Floats 30001A to 30082A, 34001A to 34066A, 30001A to 30118A, 34001A to 34128A 8/28/2003
62 NOSE WHEEL SHIMMY WIPLINE 2100/2350 SERIES AMPHIBIOUS FLOATS All 9/15/2003
63 Addition of vent ball stop AT-802A Fire Boss SN: 154,155,168,169 4/6/2004
64 PA-18 Wide Body Cub modification for 2000lb gross weight, landplane and floatplane. PA-18 Wide Body Cub SN's AF18162 & Down - Wide Body Cubs only. Ref. STC SA02187AK 5/24/2004
65 #7 Bulkhead 3000 - 3450 All model 3000 S/N 30133 and up. All model 3450 S/N 34159 and up. 2/3/2005
66 Nose wheel shimmy Wipline 2100, 2350, 3000 and 3450 series amphibious floats 9/9/2004
67 Model 2100 and 2350 weight revision. Model 2100 and 2350 floats 8/30/2004
68 Model 3000 and 3450 weight correction. Model 3000 and 3450 floats 8/23/2004
69 Replacement of main gear drag link bearings 2100/2350, 3000/3450 2100A: S/N 21001 thru ----- 2350A: S/N 23001 thru -----3000A: S/N 30001 thru -----3450A: S/N 34001 thru ----- C 7/20/2005
70 Installation -- NAS bolts - Aux Fin - Stabilizer A/C with 10000 floats: A/C S/N's: 802-0029, 0154, 0155, 0168, 0169, 0173, 0179 12/27/2004
71 AT-802 Inspection for Cracks AT-802 aircraft with Wipaire 10000 Floats D 4/6/2006
72 802 Air Tractor Float Longeron and Float Bracket Repair AT-802 aircraft with Wipaire 10000 Floats C 4/6/2006
73 Aviat A-1 operation at A-1A Gross Weight through Aviat Service Bulletin 13 Aviat Husky A-1 on 2100 floats 3/1/2005
74 Removal of Horizontal Panel and Trunion on Seaplane Floats for Weight Reduction 13000 floats 6/8/2005
75 Model 2100 and 2350 weight correction Model 2100 and 2350 floats A 6/27/2005
76 AT-802 Fireboss Finlet Inspection & Repair AT-802 w/ Fireboss conversion all serial numbers 10/5/2005
77 Updates for the Husky Long Flap Installation Husky A-1B with 110" Flaps and 2100 Floats A/C S/N's: 2285, 2288, 2289, 2291 & Up A 1/27/2006
78 AT-802 Fire Boss brake line lengthening 10000 Amphibious Floats AT-802 S/N 10001-10052 4/6/2006
79 AT-802 Fire Boss Gear Position Switch Brackets 10000 Amphibious Floats All AT-802 aircraft 4/6/2006
80 AT-802 Fire Boss Slide Tube Corrosion 10000 Amphibious Floats All AT-802 aircraft 4/6/2006
81 AT-802 Adding Larger Water Rudder Stop on Aft Bulkhead 10000 Amphibious Floats AT-802 S/N 10001-10052A 4/20/2006
82 AT-802 Fire Boss Forward Upper Brace Supports 10000 Amphibious Floats All AT-802 aircraft 5/31/2006
83 AT-802 Fire Boss Shock Strut T-Seal Change 10000 Amphibious Floats All AT-802 aircraft 6/30/2006
84 Intentionally left blank
85 Baggage Door Lip and Sealing 2100, 2350, 3000, 3450, 6000, 8000 Floats All 6/30/2006
86 Cessna 206H Drain Hole Grommets All 206 STC Applicable Float Sizes Cessna 206H (other models optional only) 7/20/2006
87 Inspection Cover Upgrade All 2100, 2350, 3000, 3450 Amphib and Seaplane Floats 8/30/2006
88 Cessna 172 Heavier Drag Wire Brace Cessna 172,172XP - 2100, 2350 Floats 9/5/2006
89 Installation Fuselage Frame Tubing Repair and Installation Revised Kicker Strut Air Tractor AT-802A - 10000 Float B 9/25/2008
90 Installation of Additional Filters for the Scoop Hydraulic Solenoid Valve Air Tractor AT-802A - 10000 Float 1/25/2007
91 Installation of Modified Main Wheel Seals Air Tractor AT-802A, de Havilland DHC-6- 10000 Float, 1300 Float 1/25/2007
92 Air Tractor Float Brackett Welding Repair, S/N 217 and Similar Air Tractor AT-802A - 10000 Float A 3/31/2007
93 AT-802 Asymmetric Scoop Position Indicator Upgrade Air Tractor AT-802A - 10000 Float A 3/22/2007
94 Fire Boss Foam Tank Securing Air Tractor AT-802A - 10000 Float C 8/3/2010
95 Slide Tube End Machining Repair Cessna 208 Caravan - 8000 Amphibious Floats 8000 Amphibious Floats - 80323 & 80324 6/1/2007
96 Caravan Under-Wing Mounted Hobbs Meter Switch Cessna 208 Caravan Amphibious or Seaplane Floats 8/14/2007
97 Nose and Main Gear Actuator Replacement 2100,2350,3000,3450 Amphibious Floats C 2/7/2014
98 Main Gear Ram Inspection and Improvement All Amphibious 6100, 8000, 10000, 13000 Floats B 2/1/2012
99 T-Seal Upgrades for Main Gear Ram and Nose Actuator 6100, 8000, 10000, 13000 Amphib floats B 2/24/2012
100 Retrofit step-struts for a grease hole 3450, 8000, 9000 13000 Amphib. and Seaplane floats A 6/25/2008
101 Wipline 10000 Floats Baggage Floor Repair Wipline 10000 Floats B 11/26/2008
102 Lake and Air Gear Advisory Information All Wipline Amphibious Floats A 1/30/2009
103 Fire Boss spin-on hydraulic filter revision 10000 Amphibious Fire Boss A 4/15/2009
106 8000 Water Rudder Pivot Shaft and Springs Inspection Single Otter, 8000 Amphibious or Seaplane Floats A 5/30/2010
107 Turbo Beaver AFMS change. 6100 Floats A 6/15/2010
108 Kodiak Top Arm Modification, 7000 Main Gear Quest Kodiak on 7000 Amphibious Floats B 10/15/2010
109 Heavy seas strut package option Quest Kodiak on 7000 Floats A 9/9/2010
110 Forward Strut Attach Bulkhead Fatigue Crack 10000 Amphibious Floats A 11/3/2010
111 8000 Float Water Rudder Lock Enhancement Cessna 208 Caravan 8000 Amphibious or Straight Floats B 1/25/2012
112 Optional Hydraulic Power-Pack Timer Relay Installation 2100, 2350, 3000, and 3450 Amphibian Floats C 4/9/2014
114 Grease seal vent hole addition for main landing gear bearings Amphibious float models 3000A, 3450A, 6000A, and 8000A A 2/21/2011
119 Reposition elevator down spring attachment tab. Quest Kodiak on 7000S or 7000A A 3/30/2011
120 Bushing repair for forward, lower center fuselage bow tie mounting plate 13000 A 4/12/2011
121 Fuselage modification, Sta. 228, empennage/tail wheel attach bulkhead fastener replacement to facilitate inspection for AD 99-15-07 compliance Viking DHC-2 MK I Boss Beaver 6100, Ski Plane, Wheel Plane A 8/3/2011
122 Fuselage modification, "Jo-Bolt" installation for 5600 lb GW Beaver Viking DHC-2 Mk. I "Beaver" with Wipaire 5600 lb gwi, 6100, wheel plane and ski plane A 8/3/2011
123 Quest Kodiak modified axle beam bushing. Quest Kodiak 100, Wipline 7000 Floats A 8/30/2011
125 Bow Bulkheads, Lower Flange Reinforcement 8000 All 9/26/2011
126 Stern Bulkheads, Lower Flange Reinforcement Fire Boss Air Tractor 802 & 802A with Wipline 10000 Floats 10118 and prior B 12/7/2011
127 8000 Nose Gear End Cap Cracks 7000A, 8000A up to and including Model 8000 SN 80398 and Model 7000 SN 70030 B 12/11/2012
128 Main Landing Gear Gravel Deflector Installation Quest Kodiak on Wipline 7000 Floats C 5/7/2013
129 Cessna 208 Drain Hole Scuppers C208 on 8000 Amphib and Straight Floats A 3/29/2012
130 Alternate Wheel Bearing Grease for Float Landing Gear All Makes and Models A 3/29/2012
131 Husky Model A-1B/A-1C 2250 Lb Increased Gross Weight Wipline 2100 Floats for Husky A-1B, A-1C-180, A-1C-200 IR 6/29/2012
132 Large Water Rudder Installation Wipline 6000 and Wipline 6100 floats A 6/22/2012
133 Structural Reinforcement, Exhaust Deflector Installation Quest Kodiak 7000 A 4/25/2012
134 Twin Otter/13000 Lower Bow Strut Fitting Life Limit Viking DHC-6 Twin Otter on Wipline 13000 floats A 8/27/2012
135 Large Water Rudder Installation Quest Kodiak 100 on Wipline 7000 Floats A 8/1/2012
136 3000/3450 Nose Box - Finger Tab Installation 3000 Amphibian and 3450 Amphibian B 7/8/2013
137 Installation of Angle Reinforcement on Model 7000 Aft Bulkhead Quest Kodiak 100, Wipline 7000 Floats Prior to 70033A A 11/19/2013
138 10000 and 13000 Nose Gear End Cap Cracks 10000A and 13000A B 12/11/2012
139 Main Landing Gear (MLG) Threaded Coupler 2100, 2350 A 3/15/2013
140 Main Landing Gear (MLG) Threaded Coupler 3000, 3450 A 3/15/2013
143 Main Landing Gear Proximity Switch 2100A, 2350A 2100A - SN 21862A and below, 2350A - SN 23150A and below. B 7/30/2014
144 Drag Strut Attachment, Washer Replacement 10000 Amphibious Floats B 01/18/2016
145 Drag Strut Attachment, Top Deck Repair 10000A A 4/30/2013
146 13000 Bulkhead #6 Crack Repair 13000 13188 and Below B 4/3/2015
147 Quest Kodiak Hydraulic Pump Electrical Wire Routing Correction Quest Kodiak 7000 A 4/24/2013
148 3000/3450 Gear Snubber Addition and Actuator Part Modification 3000A, 3450A A 9/10/2013
149 Air Tractor Long Finlet Support Strut AT802A w/ PT6A-67F (1600 HP) AT802 (2-Place)With Wipline 10000 Floats E 7/29/2016
151 Replacement Grove Wheel 2100A, 2350A, 3000A, 3450A A 9/2/2013
152 Main Gear Oleo Cylinder Piston Movement 7000, 8750 C 4/1/2014
153 Float Pump Out Tube Inspection All A 10/24/2013
154 Main Gear Oleo and Top Arm Replacement 8750A, 7000A C 6/24/2014
155 Front Strut Fittings Replacement 7000 70001-70030 C 12/19/2014
156 Plugged Bulkhead Sealant Removal 7000A, 8750A, 8750S A 3/19/2014
157 10000 Bulkheads 9-12, Lower Flange Reinforcement 10000 A 01/15/2015
158 Air Tractor Short Finlet Inspection and Support 10000A B 12/30/2014
159 13000 Scuff Plate Installation 13000 A 01/16/2015
160 Anode Installation on Floats 7000A, 8750A, 7000S, 8750S, 8000A, 8000S B 08/10/2016
161 3450 Snubber Mount Repair 3000A, 3450A A 06/15/2015
162 Main Gear Actuator Replacement 7000A, 8750A 7000A SN 70032 and below, 8750A SN 87106 and below A 8/24/2015
163 8750 terminal strip corrosion 8750A B 10/11/2016
164 8750 Power Pack O-ring Replacement 8750A A 10/26/2015
165 Air Tractor Airspeed Placards 10000A A 04/15/2016
166 Air Tractor Short Finlet Support Strut Removal 10000A A 12/04/2015
167 10000 Probe Jack End Plug Loosening 10000A A 04/27/2016
168 10000A and 13000A Main Gear Drag Brace Tube Repair 10000A, 13000A B 03/22/2017
169 8750 Pylon Nutplate Corrosion 8750A A 08/17/2016
170 Air Tractor Empennage Cracks AT-802, AT-802A, 10000A Floats A 10/24/2016
172 8750A Bulkhead 9 Cracking Cessna 208, Cessna 208B, 8750A Floats A 10/27/2016
174 3000A/3450A Main Landing Gear Shaft Replacement 3000A, 3450A, Cessna 180 (through K model), 185 through E model), A185E, A185F, 182 (P through T model), 206H, T206H, T/U206 (through G model) Maule M6-235, M7-235, M7-260, M7-420, MT7- 235, MT7-260, MT7-420, MX7-235 A 12/19/2016
175 10000A Forward Strut Spacer Installation AT-802, AT-802A, 10000A Floats A 01/05/2017

Customer Service Contact Info

Phone: 651-306-0459
Toll Free: 1-888-947-2473
Fax: 651-306-0666

customerservice@wipaire.com