This memorandum provides guidance for flammability testing of seat installations, where the
seat includes an integral stowage compartment and other console assemblies, or is otherwise
constructed with large panels. These seats are typically first class seats, installed at very large
pitch and permit full flat recline (see attachment.)

This order establishes policy and procedural guidance for managing validation travel and per
diem reimbursement. Specifically, this order provides the process for establishing
reimbursement agreements with applicants or certificate-holders for the reasonable travel and per
diem expenses of the Federal Aviation Administration (FAA) associated with official validation
travel, in accordance with the current FAA Travel Policy (FAATP). This order also provides a
process for measuring whether reimbursement activities affect the timeliness of validation by a
foreign authority of an FAA certificate or design approval or the validation by the FAA of a
foreign authority certificate or design approval. This guidance applies to technical and support
staff responsible for validation activities throughout the Aircraft Certification Service (AIR).

This advisory circular (AC) calls attention to regulatory requirements, recommended operations, and communications procedures for operating at an airport without a control tower or an airport with a control tower that operates only part time. It recommends traffic patterns, communications phraseology, and operational procedures for use by aircraft, lighter-than-air aircraft, gliders, parachutes, rotorcraft, and ultralight vehicles.

This order defines and establishes the separation criteria and procedures
for conducting Dependent Converging Instrument Approaches (DCIA) to converging intersecting and
nonintersecting runways using the Converging Runway Display Aid (CRDA) during Instrument
Meteorological Conditions (IMC).