Definitions. 1  Abatements are reductions in tax assessments and are a normal part of the IRS tax administration process. Abatements may occur for a number of reasons. 2  Accrual Accounting is the accounting basis whereby transactions and events are recognized when they occur, regardless of when cash is received or paid.
(March 2008) In United States aviation, a terminal radar service area (TRSA) is a delimited airspace in which radar and air traffic control services are made available to pilots flying under instrument flight rules or (optionally) visual flight rules for the purposes of maintaining aircraft separation.
A Line Operations Safety Audit (LOSA) is a formal process that requires expert and highly trained observers to observe operations in real-time and to collect safety-related data on environmental conditions, operational complexity, and human performance.ine Operations Safety Audit Data Exchange (LOSADE): LOSADE is a benchmarking database that can be used to see how you are doing compared to other, similar operators. Operators that implement our LOSA software are automatically included in the LOSADE database. (available for Flight Operation LOSA's only at this time).