# TCDS TT00006AT: Ken G. Guthrie - Type: Type certificate data sheet - Status: Current - Holder: Ken G. Guthrie - Revision: 1 - Revised: July 15, 2015 - Product: Aircraft, Large Airplane - Certification basis: Part 21, Part 91 - Registered aircraft: 2, by the registry models matched to it (OpenAirDocs) - Data sheet PDF: https://openairdocs.org/files/sha256/a6/bc/a6bcd9bb4f414b2919751713f63da175a51794e6f73817205492aff2970fe311 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/99E993030209944286257E88006E009F.0001 - Page: https://openairdocs.org/tcds/TT00006AT ## Models (1) As the data sheet lists them. - OV-1C (Grumman Mohawk) ## 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 TT00006AT Rev. No. 1 GUTHRIE OV-1C July 15, 2015 TYPE CERTIFICATE DATA SHEET NO. TT00006AT This data sheet, which is part of Type Certificate No. TT00006AT, prescribes conditions and l imitations under which the product for which the Type Certificate was issued meets the airworthiness requirements of the Federal Aviation Regulations (FAR). Type Certificate Holder: Ken G. Guthrie 76246 Barton Rd. Rainer, Oregon 97048 Type Certificate Holder Record: Terry R. Brown, P.O. Box 601, Daleville, AL 36322, transferred to Ken G. Guthrie on January 18, 1995. I. - Model OV-1C (Restricted Category) approved January 9, 1995 Engines 2 Lycoming T53-L-7A Engine Limits Propeller Compressor Exhaust Oil Oil Time N2 Speed N1 Speed Torque Gas Temp Temp Pres (min) (RPM) (%RPM) (PSI) (oC) (oC) (PSI) Takeoff 30 1720 101.5 97 640 93 60 Normal Cont. 1720 101.5 89 620 93 60 Start * 1720 101.5 97 - 93 10 Trans. 2 sec. 1720 101.5 156 - 93 80 Reverse 5 1720 101.5 97 640 93 60 *Do not exceed starter engagement limits of 45 sec. on, 2 min. off for three starts; and 45 sec. on, 5 min. off for all additional starts. Special inspections are required for operating outside the governor speed range, and for engines subjected to overspeed. The propeller governor speed range should be 1175 ± 25 RPM to 1678 ± 15 RPM. An engine overspeed exists when Compressor N1 speed exceeds 101.5%, or Propeller N2 speed exceeds 1850 RPM, or Propeller N2 speed exceeds 1720 RPM for more than 3 sec. Special inspections are required for engines subjected to overtorque conditions. See Technical Manual TM55-1510-204-10 for maximum torque limits. Special inspections are required for engines subjected to excessive temperatures. An engine overtemperature condition exists when exhaust gas temperature (EGT) exceeds 640 oC for more than 10 sec., or 650 oC for more than 5 sec., or 760 oC. Page No. 1 2 3 Rev. No. 1 - 1 TT00006AT -2- Fuel Commercial aviation turbine fuels conforming to ASTM Specification No. D-1655, Types Jet B, Jet A, or commercial equivalents of MIL-T-5624, Grade JP-4 or JP-5 Lubrication Commercial turbine lubricant equivalent to MIL-L-7808 or MIL-L-23699 Propeller 2 Hamilton Standard constant speed, reversible pitch, with synchrophasing, synchronizing and autofeathering features Hub Model 53C51-27 Blade Model 7125C6 Diameter 10 ft. 0 in. Low Pitch Setting 16.4 degrees Airspeed Limits Vmo (Maximum Operating) 385 KIAS Va (Maneuvering) 213 KIAS Vlo (Landing gear/flap operation) 153 KIAS Vll (Landing light extension) 180 KIAS For additional airspeed limits, see TM 55 -1510-204-10. C.G. Range +156.36 to +167.14 at all weights Datum Reference datum '0' is 97.46 in. forward of jig point. Reference stations are distances in inches aft of reference datum '0'. Leveling Means Plumb bob located in forward equipment compartment Maximum Gross Weight 16,000 lbs. Minimum Crew 1 (pilot) at +65.00 in. Number of Seats 2 (1 pilot, 1 observer/co-pilot) at +65.00 in. Fuel Capacity Main Tank 297 gal. (1930 lbs.) at +165.00 in. Drop Tanks (2 @ 150 gal.) 300 gal. (1950 lbs.) at +175.00 in. Drop Tanks (2 @ 300 gal.) 600 gal. (3900 lbs.) at +175.00 in. Unusable Fuel 6 gal. Main Tank 3 gal. all Drop Tanks Oil Capacity 5 gal., 0.7 gal. undrainable Maximum Operating Altitude 25000 ft. Control Surface Movements Elevator Up 25 ± 1o Down 15 ± 1o Trim Tab - Up 7o, Down 5o Rudder Center Left 24 ± 1o Right 24 ± 1o Outboard Left 27.5 ± 1.5o Right 27.5 ± 1.5o Trim Tab - 7o left/right of center - 3- TT00006AT Outboard Aileron, measured at inboard trailing edge, 25 ± 1o Spring Tab, measured at outboard edge, 16 ± 1o Trim Tab 15 ± 1o Inboard Aileron (flaperon), measured with flaps at 15o Down or 45o Down and with the new datum being the 25o flaperon extended position, Up 24o ± 1o Down 25o ± 1o Serial Numbers Eligible S/N 61-2692 Certification Basis FAR 21.25 (a)(2) and FAR 21.25(b)(7) effective February 1, 1965 as amended by Amendment 21-42 effective February 7, 1975. Restricted Type Certificate TT00006AT issued January 9, 1995, for the special purpose of patrolling for fires. Production Basis None. Prior to original airworthiness certification of each airplane, FAA personnel must perform an airworthiness inspection to verify it is in condition for safe operation and must witness a satisfactory flight test. Equipment The basic required equipment as prescribed in the applicable airworthiness regulations (see Certification Basis) must be installed in the airplane for airworthiness certification. In addition, the U.S. Army operator's manual, TM 55 -1510-204-10, and the FAA approved Terry R. Brown Supplemental Airplane Flight Manual, dated January 9, 1995, or later FAA approved revision, for changes resulting from disabling the ejection seats and removing external stores jettison capability. Note 1. Current weight and balance report, such as Form DD 365F, including a list of equipment included in the certificated empty weight, must be provided for each airplane at the time of original airworthiness certification. Note 2. This approval applies to Grumman Aerospace Corporation U.S. Army Model OV-1C airplanes incorporating modifications as described in Terry R. Brown Report No. 0001, no revision, dated August 17, 1994, or later FAA approved revisions. Note 3. Airplanes eligible for original airworthiness certification under Type Certificate TT00006AT may be issued Certificates of Airworthiness in the Restricted Category for the special purpose of patrolling for fires. Airplanes for which such Certificates of Airworthiness have been issued must be operated in compliance with the operating limitations for restricted category civil aircraft specified in FAR 91.313. Note 4. The following placards must be displayed in front of and in clear view of the pilot(s): (a) "THIS AIRPLANE MUST BE OPERATED AS A RESTRICTED CATEGORY AIRPLANE IN COMPLIANCE WITH THE OPERATING LIMITATIONS STATED IN THE FORM OF PLACARDS, MARKINGS, AND MANUALS, AND FAR 91.313." ` (b) "EJECTION SEATS HAVE BEEN DISABLED." Note 5. All applicable Technical Bulletins and Maintenance Work Orders for the Model OV-1C must be accomplished before airworthiness certification of that airplane. Note 6. Maintenance and inspections of the OV-1C are specified in Terry R. Brown Report "Grumman OV-1C Mohawk Inspection Program I.A.W. Federal Aviation Regulation 91.409(f)(4)", no revision, dated March 11, 1992. .....END..... ``` ## ADs None name its models. ## Registered aircraft by registry model (OpenAirDocs) - [Grumman OV-1C](https://openairdocs.org/model/grumman-ov-1c): 2 aircraft (registry code 3951002) --- 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.