# TCDS LTC-7: Holmes Douglas W. - Type: Type certificate data sheet - Status: Current - Holder: Holmes Douglas W. - Revision: 2 - Revised: February 28, 1947 - Product: Aircraft, Rotorcraft - Certification basis: CAR 9 - Registered aircraft: 1, by the registry models matched to it (OpenAirDocs) - Data sheet PDF: https://openairdocs.org/files/sha256/60/e3/60e384fee5a7b3a0292dcdf15c16f54d014f815be976a977c433e6a5220e795e - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/056408D0FDE852C08525671D005BA34B.0001 - Page: https://openairdocs.org/tcds/LTC-7 ## Models (1) As the data sheet lists them. - R-4B (Army) ## What the data sheet says This is OCR from the scanned FAA data sheet. OCR can misread letters and numbers. ```text SIKORSKY AIRCRAET MODEIS: Sikorsky (Army) R-4B Helicopter (Approved 2/28/47) SPECIEICATION NUMBER: 1-7-2 (Eligible for Certification in Limited Category only.) (Holder of Limited Type Certificate, Douglas W. Molmes, Compton, CA) Engine Warner R-550-1 or -3 Fuel 73 minimum octane aviation gasoline Engine limits Maximum rpm 2250; minimum rpm 1870 Rotor limits (Power off) Maximum rpm 265; minimum Ipm 170 Airspeed limits Never exceed 70 mpt. Maximum weight 2700 1bs. C.G. range 3.9 inches forward to 3.03 inches aft of the rotor center line Cther operating limitations ArmY T.O. AN-230FA-1 Certification basis Limited Type Certificate No. 7 (CAR 9 effective 11-21/46) Production basis None may be produced under this approval Export eligibility Not eligible for a Certificate of Airkorthiness for export No equipment other than engines and propellers are specified. such equipment as required by civil Air Pegulations Part 43.30 for the particular operation authorized for NC aircraft must be installed. additional equipment necessary for the proper operation of the aircraft. In addition, the aircraft may incorporate such military equipmert (except armament) as was originally incorporated in the type for military or naval equipment may be installed as can re substantiated on the basis that it presents no obvious hazard to safety. Weight and Balance Report including list of equipment included in the certificated empty weight must be submitted for each aircraft. Navy weight records in current condition may be submitted in lieu of actual weight. The equipment list need include no more than the following: Required equipment as defined under "Equipment" above. items as may be reasorabiy considered removable and are so located or of such weight that their removal or additior could noticeably affect the weight and balance of the aircraft. built into the aircraft structure neel not be listed. The equipment list must be prepared by the applicant for the aporoval of the certificating C.A.A. representative, and in such form that it can be attached to the C.A.A. Operation Limitations. The following placards must be prominently displayed in the positions In the cockpit in full view of the pilot: "All acrobatic maneuvers prohitited." "Night and instrument flight prohibited." "Do not apply rudder abruptly during flight." "Do not engage in maneuvers which require large and/or rapid lateral motions or reversals of the cyclical pitch control." In full view of passengers: This is a military type aircraft and under the civil sir Fegulations shall not be used for the carriage or passengers or cargo for compen- sation or hire." The following statemert must appear on the Operation Limitations: "This airplane must be operated at all times within the limitations set forth in Army Technical Order No. AN-01-20HA-1 except for limitations specifically called out in Aircraft Specification AL-7 in which case the values given in the specification must be observed. A copy of the pertinent Army Technical Order and Aircraft Specification AL-7 must be carried during In all cases it will be the responsibility of the applicant to copies of the Army Technical and wavy Service Change Order. C.A.A. does not have these documents available for distribution. All structural repairs should be made in accordance with Army Technical Order AN-01-230HA-3 also reference AN-01-230 HA-2 for maintenance. repairs or modifications (other than those covered in the pertinent Army or Navy repair manual) are made prior to and/or subsequent it is the responsibility of the owner to to a C.A.A. representative to show that the modified airplane maintains the same degree of airworthiness as the original. can give no technical assistance on such matters since complete structural data for NI aircraft are not required by Part 9 and therefore are not in the C.A.A. • original NL airworthiness certificates may be issued atter 8/31/4 f mandatory changes required prior to original certification may be obtained fro CAA Aircraft Service, Washington, D.C. Attn: ``` ## ADs (2, in force first) - [AD 47-35-01](https://openairdocs.org/ad/47-35-01): Main Rotor Links Rework · Holmes, Douglas W. R-4B (Army) - [AD 47-35-02](https://openairdocs.org/ad/47-35-02): Tail Rotor Gearbox Brace · Holmes, Douglas W. R-4B (Army) ## Registered aircraft by registry model (OpenAirDocs) - [Sikorsky R-4B](https://openairdocs.org/model/sikorsky-r-4b): 1 aircraft (registry code 8140102) --- 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.