ST01390SC
Descriptive data pertaining to this design change are considered inadequate for duplication in other products. This approval is limited to only the installation made to McDonnell Douglas Corporation Model DC3C-S1C3G, Serial No. 20401. Replacement of single engine carbon dioxide fire bottles with dual Halon bottles for model DC3C-S1C3G S/N 20401 only. Held by Cavanaugh Air Museum INC, which holds 2 approved modifications in all. Last revised June 27, 2005. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- McDonnell Douglas Corporation
- Models
- DC3C-SC3G
- Type certificate
- A-669
- On this site
- Douglas DC-3 155 registered
- The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 20, 2026.