FAA · Supplemental Type Certificate
STC SR09547RC
Installation of Dual TDR-94D/RTU-4200 Transponders with extended squitter (ADS-B) in accordance with PHI Master Document List No. PHI-S92-DL-0003, Rev. 4, dated September 10, 2011, or later FAA approved revision. The dual installation is further defined in PHI Top Drawing No. PHI-S92-60667-01, Rev. IR, dated April 8, 2009, or later FAA approved revision. Rotorcraft Flight Manual Supplement Number PHI-959-S92-RTU-001, dated May 29, 2009, or later FAA approved revision is required. Instructions for Continued Airworthiness PHI Document No. PHI-S92-ICA-0004, Rev. B, dated September 9, 2011, or later FAA accepted revision is required
What is an STC?
A Supplemental Type Certificate authorizes a major modification or alteration to an FAA-certificated aircraft. STCs are how operators legally install new avionics, change fuel systems, add floats, swap engines, etc. — every change beyond a minor modification needs one.
Applicable aircraft (1)
Specific sections
- Sec. 111
- Sec. 113
- Sec. 115
- Sec. 117
- Sec. 119
- Sec. 120
- § 21.47
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗