FAA · Supplemental Type Certificate
STC SA39CH
Installation of an Amphibian Landing Gear Position Advisory System/Laser Gear Advisory System
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 (148)
- A19SW Air Tractor Inc. · AT-802
- A19SW Air Tractor Inc. · AT-802A
- A21CE American Champion Aircraft Corp. · 8GCBC
- A33SO Amphibian Aircraft Technologies LLC · HU-16A
- A33SO Amphibian Aircraft Technologies LLC · HU-16B
- A22NM Aviat Aircraft Inc · A-1
- A22NM Aviat Aircraft Inc · A-1A
- A22NM Aviat Aircraft Inc · A-1B
- A22NM Aviat Aircraft Inc · A-1C-180
- A22NM Aviat Aircraft Inc · A-1C-200
- A23NM Buehn Dennis G. · HU-16C (UF-1)
- A4EU Cessna Aircraft Company · F172D
- A4EU Cessna Aircraft Company · F172E
- A4EU Cessna Aircraft Company · F172F
- A4EU Cessna Aircraft Company · F172G
- A4EU Cessna Aircraft Company · F172H
- A4EU Cessna Aircraft Company · F172K
- A4EU Cessna Aircraft Company · F172L
- A4EU Cessna Aircraft Company · F172M
- A4EU Cessna Aircraft Company · F172N
- A4EU Cessna Aircraft Company · F172P
- A18EU Cessna Aircraft Company · FR172E
- A18EU Cessna Aircraft Company · FR172F
- A18EU Cessna Aircraft Company · FR172G
- A18EU Cessna Aircraft Company · FR172H
- A18EU Cessna Aircraft Company · FR172J
- A18EU Cessna Aircraft Company · FR172K
- A00053SE Cub Crafters Inc. · CC19-180
- A-783 Frakes Aviation · G-73
- A-780 FS 2003 Corp. · PA-12
- A-780 FS 2003 Corp. · PA-12S
- TC 654 Grumman American Aviation Corporation · G-21
- TC 654 Grumman American Aviation Corporation · G-21A (Army OA-9; Navy JRF-1; -2; -3; -4; -5; and -6B)
- A-734 Gulfstream American Corporation · G-44
- 1A8 Helio Aircraft LLC · H-295 (USAF U10D)
- 1A8 Helio Aircraft LLC · H-700
- 1A8 Helio Aircraft LLC · H-800
- 3A23 Maule Aerospace Technology Inc. · M-5-235C
- 3A23 Maule Aerospace Technology Inc. · M-6-235
- 3A23 Maule Aerospace Technology Inc. · M-7-235
- 3A23 Maule Aerospace Technology Inc. · M-7-235B
- 3A23 Maule Aerospace Technology Inc. · M-7-260
- 3A23 Maule Aerospace Technology Inc. · M-7-260C
- 3A23 Maule Aerospace Technology Inc. · M-7-420A
- 3A23 Maule Aerospace Technology Inc. · M-7-420AC
- 3A23 Maule Aerospace Technology Inc. · MT-7-235
- 3A23 Maule Aerospace Technology Inc. · MT-7-260
- 3A23 Maule Aerospace Technology Inc. · MX-7-180B
- 3A23 Maule Aerospace Technology Inc. · MX-7-180C
- 3A23 Maule Aerospace Technology Inc. · MX-7-235
+ 98 more aircraft
Specific sections
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗