Department of Transportation  Federal Aviation Administration Aircraft Certification Service Washington, D.C. TSO-C23f Effective  Date: 09/21/2012 Technical Standard Order  Subject: Personnel Parachute Assemblies and Components 1.  PURPOSE. This technical standard order (TSO) is for manufacturers applying for a TSO  authorization (TSOA) or letter of design approval (LODA). In it, we the Federal Aviation  Administration (FAA), tell you what minimum performance standards (MPS) your personnel  parachute assembly and components must first meet for approval and identification with the  applicable TSO marking.  2. APPLICABILITY. This TSO affects new applications submitted after its effective date. a. All prior revisions to this TSO are no longer effective. Generally, we will not accept  applications for the previous revision after the effective date of this TSO. We may do so,  however, up to six months after it, if we know that you were working against the prior MPS  before the new change became effective. b. Personnel parachute assemblies and components approved under a previous TSOA may  still be manufactured under the provisions of its original approval.  3. REQUIREMENTS. New models of personnel parachute assemblies and components identified and manufactured on or after the effective date of this TSO must meet the MPS  qualification and documentation requirements in Parachute Industry Association (PIA)  Technical Standard 135 TS-135 Revision 1.4 issued April 22, 2010  “ Performance Standards for  Personnel Parachute Assemblies and Components ”  as modified by appendix 1 of this TSO.  a. Functionality.  This TSO’s standards apply to equipment intended to  be used as a  reserve or emergency parachute.  ( 1) Lose of the function defined in paragraph  3.a  is a catastrophic failure condition.  b. Failure Condition Classifications . Change 1 (December 2015)  A-48