# STC SA2172NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Sierra Industries Ltd., United States - Description: Installation of LONGWING modification including wing tip extensions, extended pneumatic de-ice boot, increased fuel capacity, and other minor refinements. - Applied: July 27, 1983 - Status date: July 31, 2017 - Product: Aircraft, Small Airplane - Certification basis: Part 21, Part 25 - Data sheets: [TCDS A22CE](https://openairdocs.org/tcds/A22CE) - Certificate PDF: https://openairdocs.org/files/sha256/8d/c4/8dc4d97989a7ec9f3bdacd0d7909861bab8ad1a934cbc55e6de9c8a73e611b5a - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4660EE494DA53A4A8625871F004C1441.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA2172NM ## ADs that name it (0) None. ## Approved models (1) - Textron Aviation Inc. 500 ([TCDS A22CE](https://openairdocs.org/tcds/A22CE)) ## What the certificate says Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record. FAA Form 8110-2 (5/14) Page 1 of 3 Reissued on July 31, 2017 to supersede the original STC, which has been lost or misplaced. Number: SA2172NM Part 25 of the Federal Aviation Regulations. Original Product – Type Certificate Number: A22CE Make: Cessna Model: 500 Installation of the Longwing Modification including wing tip extensions, extended pneumatic de -ice boot, increased fuel capacity, and other minor refinements in accordance with Sierra Industries Inc. Drawing List 11, Longwing Series, Rev. D dated June 2, 1992 or later FAA approved revision. Date of Application: July 27, 1983 Date Reissued: 11/8/84; 10/10/86; 7/21/05; 7/31/17 Date of Issuance: November 23, 1983 Date Amended: June 12, 1992 Rev. 1 Signature Title Jim Grigg Manager, Fort Worth A CO Branch, Compliance & Airworthiness Division Sierra Industries, Ltd. 122 Howard Langford Drive Uvalde, TX 78801 FAA Form 8110-2 (5/14) Page 2 of 3 Transfer the ownership of Supplemental Type Certificate Number: SA2172NM To (Name and address of transferee) From (Name and address of grantor) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA2172NM FAA Form 8110-2 (5/14) Page 3 of 3 Date of Issuance: November 23, 1983 Date Amended: June 12, 1992 Date of Reissuance: July 31, 2017 This approval should not be extended to aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate and Continuation Sheets are required to be maintained as part of the permanent records for the modified aircraft. FAA approved Robertson Aircraft, Airplane flight Manual Supplement TR 11-14, dated 11/23/83 or later FAA approved revision is required. The limitations listed in Type Certificate Data Sheet No. A22CE are applicable except as follows: **AIRSPEED LIMITS** VMO (Maximum operating) 257 KCAS (See level to 30,900 feet) MMO (Above 30,900 feet) .698 MACH VA (Maneuvering Speed) 182 KCAS VFE (Flaps Extended) 40° (Landing) 171 KCAS 15° (Takeoff & Approach) 197 KCAS VLO (Landing gear operation) 171 KCAS Autopilot Operation 257 KCAS **GROSS WEIGHT LIMIT** Max. Taxi (MTW) 12,000 lbs. Max. Takeoff (MGW) 11,850 lbs. Max. Zero Fuel (MZFW) 8,600 lbs. Max. Landing (MLW) 11,350 lbs. **FUEL CAPACITY** Two Wing Tanks 283 gal. each; usable 282 gal. each **WING SPAR INSPECTION** The wing spar inspection per AD 79-12-06 is to be conducted at intervals specified for Aircraft Serial Numbers 500-0350 and on. -END- United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA2172NM FAA Form 8110-2 (5/14) Page 4 of 3 ## Every issue (2) - July 31, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/8d/c4/8dc4d97989a7ec9f3bdacd0d7909861bab8ad1a934cbc55e6de9c8a73e611b5a) - July 21, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/16/78/16780a70023e9e26bd3489b06ec8d49d7aff4206acc9e1c5d0235864651b7734) --- 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.