NDT  Non-Destructive Test
OAMP  On Aircraft Maintenance Planning
OAT  Outside Air Temperature
OJT  On The Job Training
OP  Operational Check
OVHT  Overheat
OXY  Oxygen
P/B  Pushbutton
P/N  Part Number
PA  Passenger Address
PCU  Power Control Unit
PFD  Primary Flight Display
PMA  Parts Manufacturer Approval
（ Authority）
PMA  Permanent Magnet Alternator
PMG  Permanent Magnet Generator
PSIA  Pounds Per Square Inch Absolute
PSID  Pounds Per Square Inch Differential
PSIG  Pounds Per Square Inch Gage
Pt  Total Pressure
PTT  Push To Test Or Push To Talk
PTU  Power Transfer Unit
QAD  Quick-Attach-Detach

QAR  Quick Access Recorder
QC  Quality Control
QFE  Field Elevation Pressure
QNH  Sea  Level  Standard  Atmosphere 
Pressure
QTY  Quantity
RA  Radio Altimeter, Radio Altitude

RCVR ReceiverRH Right HandROM Read Only MemoryRPM Revolution Per MinuteRTO Rejected Take OffRVDT Rotary Variable
TransducerS/N Serial Number
Differential
SAT Static Air TemperatureSEC Spoiler Elevator Computer
SEL Selected CallCAL SFCC Slat Flap Control Computer
SID Standard Instrument Departure
SRU Shop Replaceable Unit快速存取记录器 质量控制 场压 修正海压
数量，量 无线电高度表，无线电高度 读写存储器 冲压空气涡轮 接收机 右手边，右侧 只读存储器 转/分钟 中断起飞 旋转可变差动传感器 序号 静空温 扰流板升降舵计算机 选择呼叫
襟缝翼操纵计算机 标准仪表离港 车间可更换组件