FAA · Supplemental Type Certificate
STC ST01326WI
Installation of an Aux Window Blower System Upgrade on Learjet Model 31A-144. Data required: 1) LJSC Ltd. Master Document List MDL4049-25207, Revision A, dated March 28, 2005; and 2) LJSC Ltd. Airplane Flight Manual Supplement FMS4049-25207, Revision IR, dated May 4, 2005; or later FAA approved revisions to (1) or (2).
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 ↗