FAA · Supplemental Type Certificate
STC SQ00338AT
Unison igniter leads, P/N9048222-101, 102, 103, 104, 105, 106.
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)
- E10CE Allison Engine Company Inc. · 250-B17C
- E10CE Allison Engine Company Inc. · 250-B17B
- E10CE Allison Engine Company Inc. · 250-B17E
- E10CE Allison Engine Company Inc. · 250-B15G
- E10CE Allison Engine Company Inc. · 250-B17
- E1GL Allison Engine Company Inc. · 250-C28B
- E1GL Allison Engine Company Inc. · 250-C28C
- E1GL Allison Engine Company Inc. · 250-C30
- E1GL Allison Engine Company Inc. · 250-C30G
- E1GL Allison Engine Company Inc. · 250-C30M
- E1GL Allison Engine Company Inc. · 250-C30P
- E1GL Allison Engine Company Inc. · 250-C30S
- E4CE Allison Engine Company Inc. · 250-C20
- E4CE Allison Engine Company Inc. · 250-C20F
- E4CE Allison Engine Company Inc. · 250-C20J
- E4CE Allison Engine Company Inc. · 250-C18
- E4CE Allison Engine Company Inc. · 250-C20R
- E4CE Allison Engine Company Inc. · 250-C18A
- E4CE Allison Engine Company Inc. · 250-C18B
- E4CE Allison Engine Company Inc. · 250-C18C
- E4CE Allison Engine Company Inc. · 250-C20R/4
- E4CE Allison Engine Company Inc. · 250-C20R/2
- E4CE Allison Engine Company Inc. · 250-C20R/1
- E4CE Allison Engine Company Inc. · 250-C20B
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 ↗