Free Air Temperature (FAT) and Outside Air Temperature

TM 1-1510-225-MTF completion of only that portion of the Maintenance Test Flight Check Sheet applicable to the specific equipment or systems being tested is required. Continuation sheets may be used when necessary. Items that prove to be unsatisfactory during the test flight and require corrective action shall be listed in the remarks block during flight and transferred to DA Form 2408-13-1 immediately after termination of the flight. The sheet shall be attached to the DA Form 2408-13-1 upon completion. After accumulation of two or more sheets, the data should be reviewed to determine if trends are developing. i. Free Air Temperature (FAT) and Outside Air Temperature (OAT). For the purposes of this manual, free air temperature (FAT) is considered to be the same as outside air temperature (OAT). 1-4