ST00553LA-D
Modifies the aircraft to install an AlliedSignal Flight Data Acquisition Unit, part number 965-0649-004, and status relay, installation of wiring from sensors and autopilot system to the FDAU, installation of wiring from the FDAU to the flight data recorder, installation of a circuit breaker for the new sensors, and re-routing of some existing wiring. The installation is in accordance with DAS-1-WE Approved United Air Lines Master Document List No. 00553 dated August 17, 1999, or later FAA approved revisions. Held by United Airlines INC, which holds 520 approved modifications in all. Last revised November 30, 2011. System: flight controls.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company
- Models
- 737-200 Series
- Type certificate
- A16WE
- On this site
- Boeing 737 2,892 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 22, 2026.