Aviation Maintenance Terms
14 CFR
Title 14 of the Code of Federal Regulations
A/FD
Airport/Facility Directory
AC
Advisory Circular
AC
Advisory Circular (FAA)
ACO
Aircraft Certification Office
ACR
ADS-B Aircraft Operation Compliance Report
ADIRS
Air Data And Inertial Reference System
ADS-B
Automatic Dependent Surveillance - Broadcast
ADS-B
Automatic Dependent Surveillance – Broadcast
ADS-B IN
Receipt, processing, and display of other aircraft’s ADS-B transmissions. ADS-B IN is necessary to use airborne applications.
ADS-B In- Receipt
Processing, and display of other aircraft’s ADS-B transmissions. ADS-B In is necessary to utilize airborne applications.
ADS-B OUT
Transmission of an aircraft’s position, altitude, velocity, and other information to other aircraft and ATC ground-based surveillance systems.
ADS-B Out
Transmission of an aircraft’s position, altitude, velocity, and other information to other aircraft and ATC ground based surveillance systems.
ADS-R
Automatic Dependent Surveillance - Rebroadcast
ADS-R
Automatic Dependent Surveillance – Rebroadcast
AFM
Airplane Flight Manual
AFM
Aircraft Flight Manual
AFMS
Airplane Flight Manual Supplement
AIRB
Basic Airborne
AML
Approved Model List
ANSP
Air Navigation Service Provider
ARP
Aerospace Recommended Practice
ASA
Aircraft Surveillance Applications
ASAS
Aircraft Surveillance Applications System
ASDE-X
Airport Surface Detection Equipment, Model X
ASSAP
Airborne Surveillance and Separation Assurance Processing
ASTC
Amended Supplemental Type Certificate
ATAS
ADS-B Traffic Advisory System
ATC
Air Traffic Control
ATC
Air Traffic Control
ATCRBS
Air Traffic Control Radar Beacon System
ATCRBS
Air Traffic Control Radar Beacon System
ATS
Air Traffic Services
CAVS
CDTI Assisted Visual Separation
CDTI
Cockpit Display of Traffic Information
CFR
Code of Federal Regulations
CPDLC
Controller Pilot Data Link Communication
dB
Decibel
DCPC
Direct Controller Pilot Communication
DME
Distance Measuring Equipment
EASA
European Aviation Safety Agency
EFIS
Electronic Flight Instrument System
EMC
Electro Magnetic Compatibility
EMI
Electromagnetic Interference
EPU
Estimated Position Uncertainty
EUROCAE
European Organization for Civil Aviation Equipment
EVAcq
Enhanced Visual Acquisition
FAA
Federal Aviation Administration
FAA
Federal Aviation Administration
FCU
Flight Control Unit
FHA
Functional Hazard Assessment
FIS-B
Flight Information Services - Broadcast
FIS-B
Flight Information Services - Broadcast
FMS
Flight Management System
fpm
Feet Per Minute
ft
Feet
GBAS
Ground Based Augmentation System
GNSS
Global Navigation Satellite System
GNSS
Global Navigation Satellite System
GNSS/IRS
Global Navigation Satellite System/Inertial Reference System
GPS
Global Positioning System
GPS
Global Positioning System
GVA
Geometric Vertical Accuracy
HAE
Height Above Ellipsoid
HAG
Height Above Geoid
HFOM
Horizontal Figure of Merit
HIL
Horizontal Integrity Level
HPL
Horizontal Protection Level
HUL
Horizontal Uncertainty Level
Hz
Hertz
ICA
Instructions for Continued Airworthiness
ICAO
International Civil Aviation Organization
ICAO
International Civil Aviation Organization
ID
Identification
IFR
Instrument Flight Rules
IFR
Instrument Flight Rules
INS
Inertial Navigation System
IRS
Inertial Reference System
IRU
Inertial Reference Unit
ITP
In-Trail Procedure
kts
Knots
kts
Knots
LPV
Localizer Performance with Vertical Guidance
m
meter (or “metre”), the SI metric system base unit for length
m/s
Meters per second
MCDU
Multi-Function Control and Display Unit
MCP
Mode Control Panel
MFD
Multi-Function Display
MHz
Mega Hertz
MHz
Megahertz
MOPS
Minimum Operation Performance Standards (RTCA documents)
MOPS
Minimum Operational Performance Standards
MSL
Mean Sea Level
N/A
Not Applicable or No Change
NACP
Navigational Accuracy Category for Position
NACV
Navigational Accuracy Category for Velocity
NAS
National Aerospace System
NIC
Navigational Integrity Category
NICBARO
Barometric Altitude Integrity Code
NM
Nautical Mile
POA
Position Offset Applied
RA
Resolution Advisory (TCAS II)
RA
Resolution Advisory
RAIM
Receiver Autonomous Integrity Monitoring
RC
Radius of Containment
Rc
Radius of containment
RFM
Rotorcraft Flight Manual
RFMS
Rotorcraft Flight Manual Supplement
RVSM
Reduced Vertical Separation Minimum
s
second, the SI metric system base unit for time or time interval
SA
Selective Availability
SAE
Society of Automotive Engineers
SBAS
Satellite-Based Augmentation System
SBS
Surveillance and Broadcast Services
SC
Special Committee
SDA
System Design Assurance
SIL
Source Integrity Level
SILSUPP
SIL Supplement
SIS
Signal-in-Space
SSR
Secondary Surveillance Radar
STC
Supplemental Type Certificate
SURF
Basic Surface Situation Awareness
SURF (Basic Surface)
An ADS-B application that displays traffic over an airport surface map underlay, and is used to support the flight crew in making decisions about taxiing, takeoff, and landing. The underlying map may depict runways only, or runways, taxiways, and other movement areas.
TA
Traffic Advisory (TCAS II)
TAS
Traffic Advisory System
TC
Type Certificate
TCAS
Traffic Alert and Collision Avoidance System
TCAS
I TCAS system that does not provide resolution advisories
TCAS
II TCAS system that provides resolution advisories
TCAS
Traffic Alert and Collision Avoidance System
TCAS
I Traffic Alert and Collision Avoidance System (generation 1)
TCAS
II Traffic Alert and Collision Avoidance System (generation 2)
TCAS II
The second and current generation of instrument warning TCAS. It offers all the benefits of TCAS I, but also offers the pilot direct, vocalized instructions to avoid danger, known as a "Resolution Advisory" (RA). TCAS II systems coordinate their resolution advisories before issuing commands to the pilots, so that if one aircraft is instructed to descend, the other will typically be told to climb — maximizing the separation between the two aircraft.
TIS-B
Traffic Information Service – Broadcast
TIS-B
Traffic Information Service - Broadcast
TOM
Time of Measurement
TSO
Technical Standard Order
TSO
Technical Standard Order
TSOA
Technical Standard Order Authorization
UAT
Universal Access Transceiver
UAT
Universal Access Transceiver
UTC
Coordinated Universal Time
V2
Takeoff safety speed
VAPP
Target approach airspeed
VFE
Maximum flap extended speed
VFOM
Vertical Figure of Merit
VFR
Visual Flight Rules
VH
Maximum speed in level flight at maximum continuous power
VMO
Maximum operating limit speed
VNE
Never-exceed speed
VOR
Very High Frequency Omnidirectional Range
VS
Stalling speed or the minimum steady flight speed at which the airplane is controllable
VSA
Visual Separation on Approach
VY
Speed for best rate of climb
WAAS
Wide Area Augmentation System
WGS-84
World Geodetic System-1984
WGS-84
World Geodetic System 1984
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