# STC SA31NW - Type: Supplemental type certificate - Status: Current, Issued - Holder: Madras Air Service, United States - Description: Installation of Madras wing tips. - Applied: November 15, 1972 - Status date: March 13, 1973 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS 1A15](https://openairdocs.org/tcds/1A15) - Certificate PDF: https://openairdocs.org/files/sha256/a9/e1/a9e12731ead1865ad3b832f6cb4a2814815f76fa892fa998cd6de5be40b92bab - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FF558F7EB851C50C85256CC2000A9525.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA31NW ## ADs that name it (0) None. ## Approved models (2) - Piper Aircraft Inc. PA-24-260 ([TCDS 1A15](https://openairdocs.org/tcds/1A15)) - Piper Aircraft Inc. PA-24-400 ([TCDS 1A15](https://openairdocs.org/tcds/1A15)) ## What the certificate says This is OCR from the scanned FAA certificate. OCR can misread letters and numbers. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA32N4 This certificate issued to: Madras Air Service Purt 3 ofthe CIViL Air Regulalim; (see Type Certificate Data Sheet 1415) Original Product - Type bertificate Number: 1A15 Make: PIPER Model: FA-24-260, PA-24-400 Description of Type Design Change: Installation of Madras Air Service Wing Tips in accordance with FAA Sealed Drawing MAS103, dated 15 April 1969, and MAS103-1, dated 5 March 1973. Madras Air Service 18 MAR 10-3 is required. This approval should not be extended to other specific airplanes of those models on which other previously approved modifications are incorporated unless it is xxXXXXXX determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airvorthiness of that airplane. Supplemental Type Certificate Addendun No. SAINW limits the airspeeds and is a portion of this certificate. A copy of this Certificate and Addendum shall be maintained as part of the permanent records for the modified aircraft. FAA For B110-2 (10-68) Page 1 of 3 pares 12 MAR 1973 United States of America STC SA31 NW Department of Transportation Federal Aviation Administration PIPER PA-24-260 Supplemental Type Certificate PA-24-400 (Continuation Sheet) Number: SA3111 Supplemental Type Certificate ADDENDUM NO. SAINW The conditions and limitations of Aircraft Specification No. 1A15 apply except as follows: Supplemental Type Certificate Addendum, which is a part of Supplemental Type Certificate No. SAINW prescribes conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Civil Air Regulations. A copy of this SIC Addendum is required to be maintained as a part of the modified aircrafts' permanent records. Supplemental Type Certificate Holder: MADRAS AIR SERVICE III. Model PA-24-400 as modified by STC SA31NW. Airspeed Limits (CAS) Vne (never exceed) 242 MPH (210K) Vno (Max. Structural Cruising) 203 MPH (176K) Vp (Maneuvering) 155 MPH (135K) IV. Model PA-24-260 as modified by STC SA31NW. Airspeed Limits (CAS) Vne (Never exceed) 220 MPH (191k) Vno (Max. Structural Cruising) 174 MPH (151K) Vp (Maneuvering)* 139 MPH (121K) p (Maneuvering)** 145 MPH (126K) * Serial No. 24-3642, 24-4000 through 24-4782 and 24-4784 through 24-4803. ** Serial No. 24-4783, 24-4804 and up. NOTE 1. The Weight and Balance Report must be revised as follows at the time of modification: Weight of wing tips 2.4 lbs. total; deduct weight of the tips being removed and add the difference to the aircraft empty weight. moment change is negligible. NOTE 3. Conformity to Madras Air Service Drawing No. MAS103 dated 15 April 1969 and MAS103-1 dated 5 March 1973 must be established prior to release of the aircraft to Normal Category operation. **FAA FORM B110-2-1 (10-69) PAGE OF 3 PAGES** **MADRAS AIR SERVICE** FAA APPROVED AIRPLANE FLIGHT MANUAL SUPPLEMENT TO PIPER MODEL PA-24-260 and PA-24-400 AIRPLANE FLIGHT MANUAL The information in this document is FAA/Approved material which together with the appropriate Basic CAA/FAA Approved Airplane Flight Manual is applicable and must be carried in the Basic Manual when the airplane is modified by the installation of Madras Air Service P/N 103, Wins Tip, in accordance with SIC SABINW. The information in this document supersedes the Basic Manual only where covered in the items contained herein. For Limitations, Procedures and Performance not contained in this supplement, consuli the manual proper. I• LIMITATIONS: Airspeed Limits - CAS PA-24-400 Maneuvering 155 MPH (135 Knots) Maximum Structural Cruising 203 MPH (176 Knots) Never Exceed 242 MPH (210 Knots) PA-24-260 Maneuvering 159 MPH (121 Knots) * Maneuvering 145 MPH (131 Knote) ** Maximum Structural Cruising 174 MPH Never Exceed 220 MPH (191 Knots) * PA-24-260 S/N 24-3642, 24-4000 thru 24-4782 and 24-4784 thru 24-4803. ** PA-24-260 S/N 24-4783, 24-4804 and up. II. EMERGENCY OPERATING PROCEDURES: NO CHANGE, III. NORMAL ODEPADING PROCEDURES: NO CHANGE. IV. PERFORMANCE: NO CHANGE. FAA Approved e O.: guang chief, Kamineering and Manufacturing Branch. Approval Date: 1. 3 MAR 1973 ## Every issue (1) - March 13, 1973: Issued, Current. [certificate](https://openairdocs.org/files/sha256/a9/e1/a9e12731ead1865ad3b832f6cb4a2814815f76fa892fa998cd6de5be40b92bab) --- 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.