# STC SA1663NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Sierra Industries Ltd. - Description: Addition of fowler wing flaps, elevator trim spring with cockpit tension select lever, fuselage strakes, and nacelle strakes. - Status date: July 31, 2017 - Data sheets: A7CE - Certificate PDF: https://openairdocs.org/files/sha256/ef/e3/efe3374fab24bed05a7403d472cb56dbcdd75d2a0c3baa5d913961fe28f9d7a0 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7CCA47FD9B67B7078625871F000C3C3A.0001 - Page: https://openairdocs.org/stc/SA1663NM ## ADs that name it None. ## Approved models (1) - Textron Aviation Inc. 421C (TCDS A7CE) ## 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: SA1663NM Part 3 of the Civil Air Regulations, Date May 15, 1956. Original Product – Type Certificate Number: A7CE Make: Cessna Model: 421C Addition of Fowler wing flaps, elevator trim spring with cockpit tension select lever, fuselage strakes, and nacelle strakes in accordance with FAA sealed Robertson Drawing List No. 82. FAA approved Pilot’s Operating Handbook Supplement 82-3 (POHS 82-3) is required. Date of Application: September 30, 1981 Date Reissued: 8/23/85; 10/10/86; 7/21/05; 7/31/17 Date of Issuance: July 26, 1982 Date Amended: 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: SA1663NM 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: SA1663NM FAA Form 8110-2 (5/14) Page 3 of 3 Date of Issuance: July 26, 1982 Date of Reissuance: July 31, 2017 The approval of this change in type design applies basically to the above model aircraft only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any other type design changes or previously approved modifications will introduce no adverse effect upon the airworthiness of th e aircraft. A copy of this Certificate shall be maintained part of the permanent records for the modified aircraft. The conditions and limitations of Type Certificate Data Sheet No. A7CE apply except as follows: This STC Addendum, which is part of Supplemental Type Certificate No. SA1663NM prescribes conditions and limitations under which the product for which the STC was issued meet the airworthiness requirements of the Civil Air Regulations. A copy of this STC Addendum is required to be maintained as part of the modified aircraft’s permanent records. VII – MODEL 421C (Normal Category) Airspeed Limits (IAS) remain the same except: Flaps Extended 10° 173 KIAS Flaps Extended 30° 130 KIAS Minimum Control Flaps Up 80 KIAS Minimum Control Flaps 10° 75 KIAS Minimum Control Flaps 30° 71 KIAS Control Surface Movements remain the same except: Wing Flaps Takeoff 10° ±1° Wing Flaps Landing 30° +0, -2 Note 1: The placards required by Type Data Sheet A7CE must be displayed plus the changes made by the FAA approved Airplane Flight Manual Supplement, POHS 82.3. -END- United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA1663NM FAA Form 8110-2 (5/14) Page 4 of 3 ## Every issue (2) - July 31, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ef/e3/efe3374fab24bed05a7403d472cb56dbcdd75d2a0c3baa5d913961fe28f9d7a0) - July 21, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/7e/3e/7e3ea6d96aa84f21459b2b719fdb6e674ad3c377728d591fec4ad705a668c6d2) --- From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.