SA3038WE-D
Installation of dual Collins FD-109 Flight Director System in accordance with master list of drawings and related documents for United Air Lines Change Order Authorization No. 2-4950 dated April 27, 1977 or later FAA approved revision. Each system consists of one each of the following components. Roll computer P/N 522-4428-008, Pitch Computer P/N 522-4892-008, Instrument Amplifier P/N 522-3874-005, Control Panel P/N 522-4431-001, Horizon Flight Director Indicator P/N 522-4430-002, Course Deviation\nIndicator P/N 522-2782-004, Pitch Mode Annunciator P/N R2901-159 and Roll Mode Annunciator P/N R2901-160. The Boeing DC-8-61 FAA Approved Aircraft Flight Manual DAC-33161 has been reviewed and no revision is required as a result of this change. Held by United Airlines INC, which holds 520 approved modifications in all. Last revised November 30, 2011. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company
- Models
- DC-8-61
- Type certificate
- 4A25
- 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 21, 2026.