FAA · Supplemental Type Certificate
STC SA8597SW
Installation of P/N DF062-507, upper center fuel tank bladder cells as a replacement for original bladder P/N 5630062-507.
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 (24)
- 2A4 Twin Commander Aircraft Corporation · 680FL
- 2A4 Twin Commander Aircraft Corporation · 720
- 2A4 Twin Commander Aircraft Corporation · 690B
- 2A4 Twin Commander Aircraft Corporation · 690A
- 2A4 Twin Commander Aircraft Corporation · 690
- 2A4 Twin Commander Aircraft Corporation · 685
- 2A4 Twin Commander Aircraft Corporation · 681
- 2A4 Twin Commander Aircraft Corporation · 680W
- 2A4 Twin Commander Aircraft Corporation · 680V
- 2A4 Twin Commander Aircraft Corporation · 680FL(P)
- 2A4 Twin Commander Aircraft Corporation · 680-E
- 2A4 Twin Commander Aircraft Corporation · 680
- 2A4 Twin Commander Aircraft Corporation · 560F
- 2A4 Twin Commander Aircraft Corporation · 680T
- 2A4 Twin Commander Aircraft Corporation · 680-F
- 6A1 Twin Commander Aircraft Corporation · 500
- 6A1 Twin Commander Aircraft Corporation · 560-E
- 6A1 Twin Commander Aircraft Corporation · 500-B
- 6A1 Twin Commander Aircraft Corporation · 500-U
- 6A1 Twin Commander Aircraft Corporation · 500-S
- 6A1 Twin Commander Aircraft Corporation · 520
- 6A1 Twin Commander Aircraft Corporation · 560
- 6A1 Twin Commander Aircraft Corporation · 560-A
- 6A1 Twin Commander Aircraft Corporation · 500-A
Certification basis — 14 CFR
Specific sections
- Sec. 111
- Sec. 113
- Sec. 115
- Sec. 117
- Sec. 119
- Sec. 120
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗