1-60 Definitions and Abbreviations (continued)
B. Abbreviations
14 CFR: Title 14 of the Code of Federal Regulations. The Federal Aviation
Regulations (FARs) are part of the CFR.
AOG: Aircraft on Ground
ATA-100: Air Transport Association of America Specification No. 100
BL: Butt Line Station locations
CRA: Component Return/Authorization
ELT: Emergency Locator Transmitter
EMU: Engine Monitoring Unit
FCU: Fuel Control Unit
FS: Fuselage Station locations
GCU: Generator Control Unit
HID: High Intensity Discharge
LBL: Left Butt Line Station locations
LED: Light Emitting Diode
LRU: Line-Replaceable Unit
MRDS: Main Rotor Drive Shaft
MRGB: Main Rotor Gearbox
OEM: Original Equipment Manufacturer
PTG: Power Turbine Governor
R66 IPC: R66 Illustrated Parts Catalog
R66 MM: R66 Maintenance Manual
R66 POH: R66 Pilot’s Operating Handbook
RHC: Robinson Helicopter Company
RR300 Series OMM: Rolls-Royce RR300 Series Operation and Maintenance Manual
RS: Rotor Station locations
SB: Service Bulletin
SL: Service Letter
TBO: Time Between Overhaul
TCDS: Type Certificate Data Sheet
TRDS: Tail Rotor Drive Shaft
TRGB: Tail Rotor Gearbox
TS: Tailcone Station locations
TSN: Time Since New
TSO: Time Since Overhaul
WL: Water Line Station locations
1-70 Service Directory
Please visit www.robinsonheli.com for a complete service directory.
Procure parts from any R66 Dealer or Service Center, or order directly from RHC Customer
Service via email, fax, or phone.
Page 1.4 Chapter 1 General MAY 2015
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