# TCDS A33SO: Amphibian Aerospace Industries Defense, Inc., a Delaware corporation (Delaware file no. 10288788), c/o Dunlap Bennett & Ludwig, PLLC - Type: Type certificate data sheet - Status: Current - Holder: Amphibian Aerospace Industries Defense, Inc., a Delaware corporation (Delaware file no. 10288788), c/o Dunlap Bennett & Ludwig, PLLC - Revision: 12 - Revised: April 27, 2026 - Product: Aircraft, Large Airplane - Certification basis: Part 21 - Registered aircraft: 20, by the registry models matched to it (OpenAirDocs) - Data sheet PDF: https://openairdocs.org/files/sha256/5c/cd/5ccdf2e45bba1413136a42a465ce3de6127aa30b8dedb9c60e3eb144f46227ff - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID186289864220260701131118.0001 - Page: https://openairdocs.org/tcds/A33SO ## Models (9) As the data sheet lists them. - HU-16E (UF-2G) - HU-16B - HU-16A - HU-16D (UF-2) - Wright F1820-76A - Wright F1820-76B - Wright F1820-76C - Wright F1820-76D - HU-16C (UF-1, UF-1G) ## What the data sheet says From the PDF's text layer, line by line; tables lose their columns. The PDF is the record. ```text I - Grumman Model HU-16A (Restricted Category), approved September 29,1988 DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATION TYPE CERTIFICATE DATA SHEET A33SO This data sheet, which is part of Type Certificate No. A33SO, prescribes conditions and limitations under which the product for which type certificate was issued meets the airworthiness requirements of the Federal Aviation Regulations. Type Certificate Holder: Type Certificate Holder Record Amphibian Aerospace Industries Defense, Inc., a Delaware corporation (Delaware file no. 10288788), c/o Dunlap Bennett & Ludwig, PLLC 211 Church Street Leesburg, Virginia 20175 Amphibian Aerospace Industries, Inc., c/o Dunlap Bennett & Ludwig, PLLC. transferred type certificate to Amphibian Aerospace Industries Defense, Inc., a Delaware corporation (Delaware file no. 10288788), on April 27, 2026. Amphibian Aircraf t Technologies, LLC. transferred type certificate to Amphibian Aerospace Industries, Inc. on November 20, 2024. Amphibian Aircraft International, Inc. transferred type certificate to Amphibian Aircraft Technologies, LLC. on May 1, 2016. Robinson Air Crane, Inc. transferred type certificate to Amphibian Aircraft International, Inc. on August 4, 2010. Air Crane, Inc. transferred type certificate to Robinson Air Crane, Inc. on June 29, 2010. Engines 2 W right F1820-76A, B, C, D Fuel 100/130 minimum grade aviation gasoline Engine Limits Low Impeller Ratio HP RPM MP ALT.FT. Takeoff (five min.) 1425 2700 51.5 Sea Level Takeoff (five min.) 1425 2700 50.5 2600 Maximum Continuous 1275 2500 46.5 Sea Level Maximum Continuous 1275 2500 45.5 3500 Straight line variation between points given Prope ller and Propeller Limits 3 blade Hamilton Standard Hydromatic constant speed full feathering and reversible with integral oil systems. Hub Model No.: 43D50, 43D50-601, 603 or 637 Blade No.: 6601- ( ), 6601A-7 thru -9, or 6621A-7, Nickel Plated 6999-7 thru -9, or 7005-7, 7007B, 7007B-7 Pitch settings at the 42 in. station: Low 16 degrees Feather 89 degrees Reverse -12 degrees Diameter: Maximum 132.00 in. Minimum 129.36 in. Page No. 1 2 3 4 5 Rev. No. 12 1 5 6 9 A33SO Revision 12 Amphibian Aerospace Industries Defense, Inc. (Grumman) HU-16A HU-16B HU-16C (UF-1, UF-1G) HU-16D (UF-2) HU-16E (UF-2G) April 27, 2026 A33SO Page 2 of 5 II - Grumman Model HU-16B, (Restricted Category), approved September 29, 1988 Airspeed Limits Vne (never exceed) 260 KIAS Severe Turbulence 130 KIAS Full Aileron Defection 150 KIAS Landing Gear Extended 130 KIAS Landing Lights Extended 120 KIAS Flaps Down 15 175 KIAS Flaps Down 30 135 KIAS Flaps Full Down 40 115 KIAS De-Icer Boot Operation 200 KIAS C.G. Ra nge 294" (20.5% MAC) to 304.0" (28% MAC) Datum 71. 5 forward of nose jack pad Leveli ng Means Leveled laterally by leveling lugs located in nose wheel well and longitudinally by a plum bob drop from the small hole located in the shelf of either wheel well. Maxim um Weight 33,500 lbs. Minimu m Crew 2 (pilot & copilot) Fuel Capacity Right and Left Main Tanks 340 gal. (each), 2040 lbs., (+297.3) Right and Left Float Tanks 212 gal. (each), 1272 lbs., (+307.5) Right and Left Drop Tanks 295 gal. (each), 1770 lbs., (+295.0) Oil Cap acity Right and Left Tanks 25.6 gals (each), 192 lbs., (+262.0) Control Surface Movement Other Operating Limitation U.S.A.F. Flight Manual No. T.O. 1U-16(H)A-1, dated Apr. 8, 1965 Serial Nos. Eligible 149836, 142428, 132429, 131266, 131892, 137900, 137926, 137927, 131916, 142361, 141276, 131911, 142361, 137930, 49-075 Engines 2 Wright F1820-76A, B, C, D Fuel 100 /130 minimum grade aviation gasoline Engine Limits Straig ht line variation between points given Wing Flaps Down 40 + 3 Aileron Tab Up 18+ 1 Down 12 + 1 Aileron Up 17+ 1 Down 17 + 1 Elevator Tab Up 5 + 1 Down 12 + 1 Elevator Up 30+ 1 Down 20 + 1 Rudder Tab Right 17+ 1 Left 25 + 1 Rudder Right 20+ 1 Left 15 + 1 Low Impeller Ratio HP RPM MP ALT.FT. Takeoff (five min.) 1425 2700 51.5 Sea Level Takeoff (five min.) 1425 2700 50.5 2600 Maximum Continuous 1275 2500 46.5 Sea Level Maximum Continuous 1275 2500 45.5 3500 Page 3 of 5 A33SO Pro peller and Propeller Limits 3 blade Hamilton Standard Hydromatic constant speed full feathering and reversible with integral oil systems. Hub Mode l No.: 43D50, 43D50-601, 603 or 637 Blad e No.: 6601- ( ), 6601A-7 thru -9, or 6621A-7, Nickel Plated 6999-7 thru -9, or 7005-7, 7007B, 7007B-7 Pitch settings at the 42 in. station: Low 16 degrees Feather 89 degrees Reverse -12 degrees Diam eter: Maximum 132.00 in. Minimum 129.36 in. Air speed Limits Vne (never exceed) 254 KIAS Severe Turbulence 130 KIAS Full Aileron Defection 150 KIAS Landing Gear Extended 130 KIAS Landing Lights Extended 120 KIAS Flaps Down 15 243 KIAS Flaps Down 30 163 KIAS Flaps Full Down 40 140 KIAS De-Icer Boot Operation 175 KIAS C.G. R ange 294.4" (20.5% MAC) to 304.0" (28% MAC) Datu m 71.5 forward of nose jack pad Level ing Means Leveled laterally by leveling lugs located in nose wheel well and longitudinally by a plum bob drop from the small hole located in the shelf of either wheel well. Maxi mum Weight 35,400 lbs. Minim um Crew 2 (pilot & copilot) Fuel Capacity Right and Left Main Tanks 340 gal. (each), 2040 lbs., (+297.3) Right and Left Float Tanks 212 gal. (each), 1272 lbs., (+307.5) Right and Left Drop Tanks 295 gal. (each), 1770 lbs., (+295.0) Oil Ca pacity Right and Left Tanks 25.6 gals (each), 192 lbs., (+262.0) Control Surface Movement Othe r Operating Limitations U.S.A.F. Flight Manual No. T.O. 1U-16(H)B-1, dated Dec. 1, 1967 Serial Nos. Eligible 0126, 1030, 9099, 51-5291, 51-7195A, 51-0043, 86B, 51-0019, 51-7162, 49-097, 99-7213, 51-7187, 51-025, 2132, 51-7246, 51-5303, 146427, 51-7240 Wing Flaps Down 40 + 3 Aileron Tab Up 18+ 1 Down 12+ 1 Aileron Up 17+ 1 Down 17+ 1 Elevator Tab Up 5 + 1 Down 12+ 1 Elevator Up 30+ 1 Down 20+ 1 Rudder Tab Right 16+ Left 26+1 Rudder Right 20+ Left 15+1 A33SO Page 4 of 5 IV-Grumman Model HU-16D (UF-2) (Restricted Category), approved January 23, 1995 V-Grumman Model HU-16E (UF-2G) (Restricted Category), approved January 23, 1995 Same as the Model HU-16A, see Section I for information, except as follows: Ser ial Nos. Eligible 131904, 131905, 131906, 131910, 131917, 137912, 137921, 137924, 137928, 137932, 137933, 141262, 141265, 141271, 142360, 142362, 17164 Sam e as the Model HU-16B, see Section II for information, except as follows: Ot her Operating Limitations: U.S. Navy Flight Manual NAVWPS 01-85AB-1 Serial Nos. Eligible 7188, 7214, 7227, 7245, 7226, 1311, 146426, 141278 Sam e as the Model HU-16B, see Section II for information, except as follows: Oth er Operating Limitations: U.S. Navy Flight Manual NAVWPS 01-85AB-1 Serial Nos. Eligible 1265, 1272, 1294, 137904, 137911, 2135 DATA PERTINENT TO ALL M ODELS Certification Basis FAR 21.25(a)(2), effective February 1, 1965, Amendments 21-1 through 21-60. Date of application July 27, 1988. Type Certificate A33SO, issued September 29, 1988, for the special purpose of patrolling, agricultural, forest and wildlife conservation, aerial surveying, weather control, and carriage of cargo. Pr oduction Basis None. Equi pment The basic required equipment as prescribed in the applicable Airworthiness Regulations (see Certification Basis) must be installed in the aircraft for certification. In addition, Airplane Flight Manual, T.O. 1U-16(H) A-1, T.O. 1U-16(H)B-1, or NAVWPS 01-85AB-1 must be included in the airplane. Note 1. Current weight and balance report including a list of equipment in certificated empty weight and loading instructions when necessary must be in the aircraft at the time of original certification and at all times thereafter. No te 2. The following placard must be installed in clear view of the pilot: THI S AIRPLANE MUST BE OPERATED AS A RESTRICTED CATEGORY AIRPLANE IN COMPLIANCE WITH THE OPERATING LIMITATIONS STATED IN THE FORM OF PLACARDS, MARKINGS, AND MANUALS. No persons may be carried on a restricted category civil aircraft unless they are necessary for the accomplishment of the work activity directly associated with that special purpose. Reference FAR 91.313. III - Grumman Model HU-16C (UF-1, UF-1G) (Restricted Category), approved January 23, 1995 Page 5 of 5 A33SO Note 3. Models HU-16B, HU-16D and HU-16E airplanes are limited to the following flight hours due to the installation of 7075-T6 spar caps in the wing center section: HU-16B S/N's Flight Hrs. HU-16D S/N's Flight Hrs. HU-16E S/N's Flight Hrs. 0126 8906 7188 9656 1265 9430 1030 9505 7214 9855 1272 9723 9099 8307 7227 9043 1294 9388 51-5291 8936 7245 9855 137904 8932 51-7195A 8646 7226 9049 137911 8312 51-0043 8696 1311 8284 2135 9305 86B 9855 146426 7871 51-0019 9630 141278 8454 51-7162 9500 49-097 8073 99-7213 9593 51-7187 8254 51-025 8621 2132 8785 51-7246 8922 51-5303 8433 146427 8371 51-7240 9157 Note 4. T hese airplanes must be serviced and maintained in accordance with T.O. 1U-16(H)A/B-2 or NAVWPS 01-85AB-2 and an approved progressive maintenance program. Note 5. A. T he airplane must satisfactorily pass an inspection for possible hidden damage and for workmanship and materials used in making any repairs and/or alternations. A FAA 8130-9 must be completed. B. The mai ntenance, overhaul, and modification records must be reviewed for changes made by the military services that may have an effect on the airworthiness of the airplane. Modifications and changes of equipment which effect the safety or performance of the airplane must be approved by the Federal Aviation Administration. C. Conduct an i nspection of the engine support structures to verify their structural integrity. D. This aircr aft is not equipped or approved for operation with APU. E. Th e modification data plate in restricted category must be installed next to manufacturer’s data plate in cockpit. Note 6. Carriage of hazardous materials is prohibited unless compliance is shown with applicable regulations in the Code of Federal Regulations, Title 49, Part 175. Note 7. T he following note must be placed under "exceptions" on all export certificates of airworthiness for this airplane. "This airplane is type certificated in the restricted category and may not meet the applicable airworthiness code as provided by Annex 8 to the Convention of International Civil Aviation." Note 8. Flight into known icing is prohibited. Note 9. Approved cargo nets/straps to be FAA TSO'd equipment. Note 10 . Two (2) oxygen masks providing 100% breathing capacity for both pilots and two (2) smoke masks are required for flight in the aircraft at all times, if in cargo configuration. Note 11 . Two (2) fire extinguishers installed - one in cockpit and one in cabin are required. Note 12. Deleted .....END..... ``` ## ADs None name its models. ## Registered aircraft by registry model (OpenAirDocs) - [Grumman HU-16B](https://openairdocs.org/model/grumman-hu-16b): 10 aircraft (registry code 3950408) - [Grumman HU 16E](https://openairdocs.org/model/grumman-hu-16e): 7 aircraft (registry code 3950414) - [Grumman HU 16A](https://openairdocs.org/model/grumman-hu-16a): 2 aircraft (registry code 3950406) - [Grumman HU-16D](https://openairdocs.org/model/grumman-hu-16d): 1 aircraft (registry code 3950413) ## STCs approved under this data sheet (4) - [STC SA02511SE](https://openairdocs.org/stc/SA02511SE): Installation of replacement fuel quantity indicator sending unit(s). CiES Inc. - [STC SA39CH](https://openairdocs.org/stc/SA39CH): Installation of an Amphibian Landing Gear Position Advisory System/Laser Gear Advisory System. Wipaire Inc. - [STC SA4503NM](https://openairdocs.org/stc/SA4503NM): Remove original cloth covering and install Ceconite covering. Ceconite Division of Poly-Fiber Inc. - [STC ST334CH](https://openairdocs.org/stc/ST334CH): Installation of Superflite 102 fabric.. Aviation Products Systems Inc. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.