# SAIB NE-05-34: - Type: Special airworthiness information bulletin (advisory, not mandatory) - Status: Current - Revision: 0 - Issued: March 1, 2005 - Products: Curtiss-Wright R-1820 engines Engine cylinders installed on model HU-16 (UF-1), SA-16A, S-2, TS-2A and T-28 airplanes - Product type: Engine - PDF: https://openairdocs.org/files/sha256/6e/3b/6e3b7a30e4fd351a57fda96bebdbef5160c26667c292ef989e85584fbdfc497e - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/71D93500BBC0F4428625721F0052EB53.0001 - Page: https://openairdocs.org/saib/NE-05-34 ## Text **SPECIAL AIRWORTHINESS** **INFORMATION BULLETIN** Aircraft Certification Service Washington, DC U.S. Department of Transportation Federal Aviation Administration NE-05-34 March 1, 2005 www.faa.gov/certification/aircraft This is information only. Recommendations aren’t mandatory. Introduction We are issuing this Special Airworthiness Information Bulletin to inform you, owners and operators of certain airplanes (see Table 1) with Wright Aeronautical Division, Curtiss- Wright Corp. model R-1820 engines installed, of additional information relating to an Unapproved Parts Notification (UPN). The UPN has designated certain cylinders on Wright model R-1820 engines as Suspected Unapproved Parts (SUPS). Table 1 Affected Aircraft Engine Model Engine SN Cylinder SN (Airpower, Inc.) Buehn, Dennis G. HU-16 (UF-1) series (formerly Grumman) and SA-16A (formerly Grumman) R-1820-76 BL510087 AP5111, 5112, 5114,5116, 5121, 5123, 5124 and 5126 W507451 AP4988, 4989, 4990, 4991, 4992, 4993 and 4994 W507573 AP4882, 4940, 4964, 4965 and 4967 Douglas Aircraft Co., Inc. DC-3 R-1820-80 W507589 AP4498, 4937, 4966, 4969, 4970, 4972 and 4974 BL515782 AP5021 BL516585 AP3753, 3758, 3764, 4497, 4869 and 4883 BL516700 AP2595, 4973 and 4995 PC10037 AP2139, 5036, 5038, 5039, 5041, 5042, 5051 and 5052 PC10045C AP3323, 5059, 5066, 5068, 5074, 5077, 5078 and 5079 PC10098C AP5001, 5003, 5004, 5005, 5006, 5022, 5024 and 5025 PC10179C AP5034 and 5035 PC10184C AP5044, 5065, 5069, 5075 and 5076 PC10223 AP5037, 5040, 5043, 5056, 5057, 5060, 5062 and 5064 PC10245C AP4867, 4902, 4907 and 4909 PC10259 AP2975, 4980 and 4985 California Department of Forestry S-2 (formerly Marsh Aviation Co. and Grumman) and TS-2A (formerly Grumman) R-1820-82 PC10268C AP2978, 4908, 4911 and 5071 2 BL520708 AP3401, 4800, 4816, 4842 and 4910 Thompson Aircraft Sales T-28 (formerly North American Aviation) R-1820-86 BL520779 AP3037 Background During the period of January 2002 to August 2004, West Coast Cylinder Works (West Coast Cylinder), found at 13907 Marquardt Avenue, Santa Fe Springs, CA 90670, did not properly inspect cylinders for Wright R-1820- 76, -80, -82 and -86 engines. There is evidence they didn’t perform a Fluorescent Penetrant Inspection (FPI) on certain cylinders, as required by the process specification we approved. These cylinders were subsequently sold as spares or installed on engines that Airpower, Inc. overhauled and returned to service. Airpower, Inc. is an FAA certificated repair station, NS3R721L, located at 4745 Highland Springs Road, Lakeport, CA 95453. We issued Unapproved Parts Notification (UPN), No. 2004-00210, on February 1, 2005. The UPN has a partial listing of engine and cylinder serial numbers, as well as the type airplane on which the engine was installed. West Coast Cylinder sold the cylinders listed in Table 2, identified by SN, as spares for the R-1820-82 used on the S-2 and TS-2A. Table 2 AP2976 4870 4935 4978 3030 4912 4936 4996 3336 4924 4937 4997 4130 4930 4939 5054 4636 4931 4941 5061 4806 4932 4942 5063 4866 4933 4953 5073 4868 4934 4977 Recommendation We recommend that you perform a compression check on each cylinder identified by SN in the table or the spare cylinders listed above at 100 hours time-in-service (TIS) intervals. In addition, we recommend you perform a visual inspection for oil leaks, combustion “blow-by,” etc. at intervals of 25 hours TIS. For Further Information, Contact Jerry Robinette, Aerospace Engineer, Atlanta Aircraft Certification Office, FAA, Small Airplane Directorate, 1895 Phoenix Boulevard, One Crown Center, Suite 450, Atlanta, GA, 30349; phone (770) 703-6096; email: jerry.robinette@faa.gov; fax: (770) 703-6097. ## Registered aircraft it may concern (OpenAirDocs) Registry models matched by make and model, the same way as ADs, most registered aircraft first. - [Christen Industries S-2](https://openairdocs.org/model/christen-industries-s-2): 0 registered aircraft (airframe model) - [Grumman SA 16A](https://openairdocs.org/model/grumman-sa-16a): 0 registered aircraft (airframe model) - [Grumman TS-2A](https://openairdocs.org/model/grumman-ts-2a): 0 registered aircraft (airframe model) - [Pitts S-2](https://openairdocs.org/model/pitts-s-2): 0 registered aircraft (airframe model) --- 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.