# TCDS A51NM: United Aeronautical Corporation - Type: Type certificate data sheet - Status: Current - Holder: United Aeronautical Corporation - Revision: 3 - Revised: May 1, 2026 - Product: Aircraft, Large Airplane - Certification basis: Part 21, Part 21, Part 25 - Data sheet PDF: https://openairdocs.org/files/sha256/61/95/6195fc8e8702c1e0e3adcfaff7d502bc0e2ae4385aa7a2119904cf4394e9cfe7 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID169045181020260519162455.0001 - Page: https://openairdocs.org/tcds/A51NM ## Models (1) As the data sheet lists them. - S2F-3T ## What the data sheet says From the PDF's text layer, line by line; tables lose their columns. The PDF is the record. ```text DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATION A51NM United Aeronautical Corporation Revision 3 Grumman S2F-3T May 1, 2026 TYPE CERTIFICATE DATA SHEET NO. A51NM This data sheet, which is a part of Type Certificate No. A51NM, prescribes the conditions and limitations under which the product for which the Type Certificate was issued meets the Airworthiness Requirements of the Federal Aviation Regulations. Type Certificate Holder: United Aeronautical Corporation 7360 Laurel Canyon Blvd North Hollywood, CA 91605 Type Certificate Recorder Holder: Marsh Aviation Company 5060 East Falcon Drive Mesa, AZ 85215 Type Certificate Recorder Holder: Anne Stilwell Kleefisch 5060 East Falcon Drive Mesa, AZ 85215 Type Certificate Recorder Holder: Marsh Aviation Company 5060 East Falcon Drive Mesa, AZ 85215 I - Model S2F-3T (Restricted Category) Approved Date May 21, 1999 Engine 2, AlliedSignal/Garrett 331-15AW TC E18NE Fuel Engine operation is approved with the following fuels: AlliedSignal EMS53111 (Type A) AlliedSignal EMS53112 (Type A1) (JP-8) (British D. Eng. R.D. 2494 Issue 7) AlliedSignal EMS53113 (Class A-JP4) Class B-type (British D. Eng. R.D. 2486 Issue 8) AlliedSignal EMS53116 (Type JP-5) AlliedSignal EMS53122 (Grade 100 LL) Anti-icing additive conforming to PFA-55MB or MIL-I-27686 must be used when operating in conditions where the fuel temperature is 0° C or less. Page 1 1 2 3 4 5 6 Rev. 2 3 - - - - - A51NM Page 2 Shell ASA-3 anti-static additive, or equivalent, to bring fuel up to 300 conductivity units and no more than 1 ppm. Sohio Biobor JF Biocide additive or equivalent not to exceed 270 ppm maximum (220 ppm of elemental boron), for pesticide purposes. Aviation gasoline MIL-G-5572D, Grade 100/130 (low lead), not in excess of 50 gallons per 100 hours of operation (per engine), may be used for emergency operation. Total usage must be limited to 7000 gallons during any 3000 hour period. Aviation gasoline MIL-G-5572D, Grade 80/87 not in excess of 1000 gallons per 100 hours of operation, may be used for emergency operation. If 25% or more Avgas is used at any time, one quart of Aviation grade 120 mineral oil must be added to mixture per 100 gallons of Avgas. (Aviation grade oil to MIL- L-6082.) Fuel (cont’d) If combinations of aviation gasoline are used, the following formula is required for establishing proportions of combinations during any 3000 hour period: Gals. 100/130 (low lead) + Gals. 80/87 < or = 1 7000 Gals. 30,000 Gals Fuel Type Avgas, JP-4, Jet-B JP-5/I, JetA/A-1 JP-8 Min. Temp for Starting -50°C -44°C -42°C Engine Limits Engine Ratings and Operating Limits: Takeoff and Maximum Continuous SHP 1645 Maximum Continuous Torque 6234 Ft - Lb. (100%) Takeoff and Maximum Continuous RPM 1390 (101%) Ground Idle - Minimum RPM 890 (64%) CONDITION TORQUE RPM % MIN/MAX OIL PRESS MIN/MAX EGT OIL TEMP MIN/MAX Takeoff 100 100/101 45/70 100% (2) 55/110°C Max. Cont. 100 96/101 45/70 100% (2) 55/110°C Ground Idle --- 64 (Min) 15/70 --- 55/100°C Starting --- --- --- 770°C 44/110°C Transient 104 (Max) 30 Sec. 104 (Max) (1) --- 37 Above --- (1) Do not exceed 106% RPM at any time. Transient engine speed maximum limit is from 101% to 104% RPM. Engine speed for Overspeed Governor (OSG) check is limited to 30 seconds from 104% to 105% RPM and seconds from 105% to 106% RPM. (2) 100% with variable redline system EGT (VRL) operative, see approved Flight Manual Supplement/Pilot’s Operating Handbook 3DE6105 dated May 13, 1997, for EGT values with VRL system inoperative. Reverse; Landing --- 93 (Min) Maximum airspeed (on ground) for reverse operation is 90 KIAS Reverse; Static --- 64 (Min) If Beta light is inoperative, do not use reverse A51NM Page 3 Windmilling 5-20% Above 20% 5 MINUTE MAXIMUM 1 MINUTE MAXIMUM Backward Rotation NOT RECOMMEND Propeller and Propeller Limits Hartzell Five Blade Single Acting TC No. P20NE Hub Model - HC-E5B-5X1 Blade Model - E12902KX Diameter - 132 inches Blade Angle (measured at Station 54 inches): Reverse 8.0° ± 0.5° Start Lock -4.0° ± 0.1° Feather -78.7° ± 0.5° Flight Idle 5.0° to 6.6° Counterweight 100° (Fixed) Limitations - Stable ground operation below 655 and from 69% to 75% RPM is prohibited. Propeller blades are life limited and shall be retired after 12500 hours of operation. Propeller blade diameter is 132 inches and no cutoff is allowed. Airspeed Limits (IAS) VD (Dive) 280 KIAS VMO (Maximum Operating ) (1) 235 KIAS VA (Maneuvering) 175 KIAS VFE (Flaps Extended) 150 KIAS VLE (Landing Gear Extended) 150 KIAS (1) VMO is 235 KCAS 20,500 feet and below. Above 20,500 feet straight line variation to 215 KCAS at 25,000 feet. Center of Gravity (C.G.) Range Landing Gear Extended (all flight weights) Forward Limit 213.41 in. aft of Datum (21.0% MAC) Aft Limit 221.22 in. aft of Datum (29.85 MAC) Landing Gear Retracted (all flight weights) Forward Limit 215.35 in. aft of Datum (23.2% MAC) Aft Limit . 223.16 in. aft of Datum (32.0% MAC) Empty Weight C. G. Range None. Datum The Datum is a point 32 inches forward of the most forward structure of the aircraft. Leveling Means Floor inside cabin entrance door at Station No. 189. Maximum Weights Takeoff 29,150 lbs. Landing 24,800 lbs. Minimum Crew One pilot at Station No. 104.7 left side. Number of Seats Four plus one jumpseat. Two at Station No. 104.7. A51NM Page 4 Two at Station No. 162.5. Jumpseat at Station No. 126. Fuel Capacity Two wing tanks total 765 U.S. gallons at Station No. 228.9. Total usable fuel (all tanks) is 728 U.S. gallons. Reference Note 1. Oil Capacity One tank each engine of 7 quart capacity. Oil tank is supplied with engine and forms an integral part of engine. Engine is approved for Type II oils meeting MIL-L-23699B or EMS53110. Operating oil temperature range is as follows: Ground Start Minimum -40°C Ground Idle Maximum 127°C Cruise Maximum 110°C Takeoff Maximum 127°C (5 minute limit above 110°C for takeoff) Maximum Operation Altitude 25,000 Feet Control Surface Movements CONTROL SURFACE DIRECTION DEGREES ALLOWABLE Left Aileron Up 18 + 1/-2 Down 15 +1/-2 Right Aileron Up 18 +1/-2 Down 15 +1/-2 Left Elevator Up 25 ± 1 Down 15 ± 1 Right Elevator Up 25 ± 1 Down 15 ± 1 Rudder Left 21 ± 1 Right 21 ± 1 Rudder Trimmer (Hydraulic @ Left 15 Electric Actuator Extended) Right 25 Rudder Trimmer (Hydraulic @ Left 25 Electric Actuator Retracted) Right 15 Rudder Trimmer Left 20 ± 1 (Hydraulic Actuator Only) Right 20 ± 1 Rudder Trimmer Left 5 ± 0.10’ (Electric Actuator Only) Right 5 ± 0.10’ Left Elevator Trim Tab Up 20 ± 1 Down 20 ± 1 Right Elevator Trim Tab Up 20 ± 1 Down 20 ± 1 Aileron Trim Tab (L. Only) Up 20 ± 1 Down 20 ± 1 Rudder Tab Left 14 ± 2 Left Elevator Geared Tab Down Elevator 5 ± 1 Up Elevator 20 ± 2 A51NM Page 5 Control Surface Movements (cont’d) ` Right Elevator Geared Tab Down Elevator 5 ± 1 Up Elevator 20 ± 2 Left Elevator Spring Tab Up 15 ± 1 Down 20 ± 2 Right Elevator Spring Tab Up 15 ± 1 Down 20 ± 2 Left Outboard Flap Down 27.5 ± 2 Right Outboard Flap Down 30 ± 2 Left Inboard Flap Down 40 ± 2 Right Inboard Flat Down 40 ± 2 Left Outboard Spoiler Up 52 ± 3 Right Outboard Spoiler Up 52 ± 3 Left Inboard Spoiler Up 37 ± 2 Right Inboard Spoiler Up 37 ± 2 Manufacturer’s Serial Numbers The original Navy designation for the eligible airplanes was S2F-3. Variations in installed mission equipment resulted in new designations for the S2F-3 airframe. These variations were designated S2F-3S, S-2D, ES-2D, S-2E, and S-2G. S2F-3 aircraft eligible for Airworthiness certification under this Type Certificate, must be modified for the special purpose forest and wildlife conservation (fire fighting) by installing Allied Signal/Garrett 331 engines and Hartzell propellers in accordance with the latest FAA approved revision of Marsh Aviation Company Master Drawing List 3-DE1104. Only the aircraft listed below are eligible for Airworthiness Certification under this Type Certificate. Grumman S/N Navy S/N 001C 147531 Certification Basis FAR 21.25 (a) (2) FAR 21.101 (a) (b) (c) and FAR Part 25 dated June, 1964, through Amendments 25-1 through 25-79. Restricted Category Type Certificate A51NM, dated May 21, 1999, issued for the special purpose of forest and wildlife conservation (fire fighting). Application for Restricted Type Certificate dated June 8, 1992. A Finding of No Significant Impact (FONSI) for the modified Grumman Model S2F-3 aircraft has been accomplished and approved on November 12, 1998. A finding under the applicable provisions of the Noise Control Act of 1972 has been accomplished and approved on November 12, 1998, for the modified Grumman S2F-3 aircraft (Restricted Category – Military Surplus). A51NM Page 6 Production Basis None. Prior to original certification of each aircraft an FAA representative must perform a detailed inspection for workmanship, materials, conformity with approved technical data, and a check of flight characteristics. Equipment Basic required equipment as prescribed in applicable airworthiness regulations (see Certification Basis) must be installed in the aircraft for certification. Aircraft must be equipped with Allied Signal/Garrett 331-15AW engines and Hartzell HC-E5B-5X1 propellers installed in accordance with the latest FAA approved revision of Marsh Aviation Company Master Drawing List number 3-DE1104 to be eligible for airworthiness certification under Type Certificate A51NM. NOTE 1 Current Weight and Balance report containing a list of equipment included in the certified empty weight, and loading instructions, when necessary, must be provided for each aircraft at time of original certification. NOTE 2 All required placards listed in the FAA approved S2F-3T Flight Manual Supplement/Pilot Operating Handbook 3-DE6105 dated May 13, 1997, must be installed in the aircraft. NOTE 3 This aircraft must be maintained in accordance with NAVAIR 01-85SAD-2 and the latest revision of Marsh Aviation Company Maintenance Manual Supplement 3-DE6106 which contain the original minimum scheduled maintenance program required for the S2F-3T to meet the requirements for continued airworthiness. NOTE 4 Aircraft shall be operated in accordance with NATOPS Flight Manual 01-855AE- 1, plus the FAA approved S2F-3T Flight Manual Supplement/Pilot Operating Handbook 3-DE6105 dated May 13, 1997. NOTE 5 Prior to issuance of airworthiness certificate for each aircraft, and at prescribed intervals all inspections and modifications must be accomplished per latest version of Marsh Aviation Company S2F-3T Technical Directive Index. NOTE 6 Upon completion of conversion to certified status in Restricted category, an additional dataplate, incorporating the S2F-3T designation which includes a statement that the aircraft has been modified per TC A51NM, must be installed near the original dataplate. Under no circumstances should the original or any succeeding dataplate be removed from the aircraft. NOTE 7 This aircraft is prohibited from carrying cargo for compensation or hire. Carriage of cargo is limited to such cargo that is incidental to the aircraft owner/operator’s business which is other than air transportation. NOTE 8 Restricted category aircraft may not be operated in a foreign country without the express written approval of that country. NOTE 9 This aircraft has not been shown to meet the requirements of the applicable comprehensive and detailed airworthiness code as provided by Annex 8 to the Convention on International Civil Aviation. ---------------END--------------- ``` ## ADs None name its models. ## STCs approved under this data sheet (1) - [STC ST01159LA](https://openairdocs.org/stc/ST01159LA): Installation of a nose wheel.. Marsh Aviation Company --- 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.