25 OCT 2010
R66 Maintenance Manual
Chapter 95 Instrument System
Page 95.5
95-20 Primary Instruments
95-21 Vertical Speed Indicator
The vertical speed indicator indicates rate of ascent or descent. Check vertical speed
indicator for a zero-rate needle indication when rotorcraft is in a stationary hover.
95-22 Airspeed Indicator
The airspeed indicator displays airspeed in knots and miles per hour. The airspeed
indicator operates in forward flight only; backward or lateral flight will not indicate correct
airspeed.
95-23 Engine (N2) and Rotor Dual Tachometer
CAUTION
Installation of electrical devices can affect accuracy and reliability
of electronic tachometers.
An electronic engine (N2) and rotor dual tachometer is standard. Engine tachometer signal
is provided by a transducer on the engine gearbox. Rotor tachometer signal is provided by
magnets on the main gearbox tail rotor driveline yoke. Each tachometer is on a separate
circuit with its own circuit breaker. The tachometer bus receives power from the avionics
bus or through the battery relay bypass circuit as long as the main rotor gearbox has
oil pressure. Therefore, the tachometers will receive power through the bypass circuit
whenever the rotors are turning even if the avionics bus is not powered. The bypass circuit
is disconnected from the tachometer bus when the annunciator test button is depressed.
Pressing the test button while the helicopter is running will confirm that the tachometers
are receiving power from the avionics bus.
A. Adjustment
NOTE
The dual tachometer is preset at RHC. Slight variations between
rotorcraft may require tachometer adjustment.
1. Open upper console.
2. Run-up helicopter per R66 Pilot's Operating Handbook (POH) Section 6 at 100%
engine tachometer indication.
3. Turn adjustment screw on back of tachometer clockwise to increase and
counterclockwise to decrease rotor tachometer indication (one-half turn equals
approximately 1% change). Adjust rotor tachometer to indicate 100%.
4. Shutdown helicopter per R66 POH Section 6. Close and secure upper console.
95-24 Altimeter
The sensitive altimeter provides altitude information relative to mean sea level when the
barometric pressure correction scale is properly set. Check altimeter calibration by setting
correction scale to the current altimeter setting and checking the altimeter reading against
location elevation; they must agree within 70 feet.
Summary of Contents for RTR 660
Page 6: ...Intentionally Blank Page vi Introduction R66 Maintenance Manual SEP 2012...
Page 18: ...Intentionally Blank Page xviii Introduction R66 Maintenance Manual SEP 2012...
Page 20: ...Intentionally Blank Page 1 ii Chapter 1 General R66 Maintenance Manual SEP 2012...
Page 30: ...Intentionally Blank Page 1 10 Chapter 1 General R66 Maintenance Manual SEP 2012...
Page 42: ...Intentionally Blank Page 5 ii Chapter 5 Inspection Schedule R66 Maintenance Manual SEP 2012...
Page 54: ...Intentionally Blank Page 5 12 Chapter 5 Inspection Schedule R66 Maintenance Manual SEP 2012...
Page 90: ...Intentionally Blank Page 5 44 Chapter 5 Inspection Schedule R66 Maintenance Manual 25 OCT 2010...
Page 108: ...FIGURE 7 1 JACKING Page 7 2 Chapter 7 Jacking and Hoisting R66 Maintenance Manual SEP 2012...
Page 110: ...FIGURE 7 2 HOISTING Page 7 4 Chapter 7 Jacking and Hoisting R66 Maintenance Manual SEP 2012...
Page 114: ...Intentionally Blank Page 8 ii Chapter 8 Weight and Balance R66 Maintenance Manual 25 OCT 2010...
Page 118: ...Intentionally Blank Page 8 4 Chapter 8 Weight and Balance R66 Maintenance Manual SEP 2012...
Page 130: ...Intentionally Blank Page 9 ii Chapter 9 Ground Handling R66 Maintenance Manual 25 OCT 2010...
Page 154: ...Intentionally Blank Page 12 ii Chapter 12 Servicing R66 Maintenance Manual SEP 2012...
Page 160: ...FIGURE 12 3 TAIL ROTOR GEARBOX Page 12 6 Chapter 12 Servicing R66 Maintenance Manual SEP 2012...
Page 164: ...FIGURE 12 4 HYDRAULIC SYSTEM Page 12 10 Chapter 12 Servicing R66 Maintenance Manual SEP 2012...
Page 174: ...Intentionally Blank Page 12 20 Chapter 12 Servicing R66 Maintenance Manual SEP 2012...
Page 176: ...Intentionally Blank Page 18 ii Chapter 18 Track and Balance R66 Maintenance Manual SEP 2012...
Page 191: ...Intentionally Blank 25 OCT 2010 R66 Maintenance Manual Chapter 18 Track and Balance Page 18 15...
Page 236: ...Intentionally Blank Page 21 ii Chapter 21 Environment Control R66 Maintenance Manual SEP 2012...
Page 238: ...FIGURE 21 1 NOSE VENT Page 21 2 Chapter 21 Environment Control R66 Maintenance Manual SEP 2012...
Page 250: ...Intentionally Blank Page 21 14 Chapter 21 Environment Control R66 Maintenance Manual SEP 2012...
Page 252: ...Intentionally Blank Page 25 ii Chapter 25 Furnishings R66 Maintenance Manual SEP 2012...
Page 264: ...Intentionally Blank Page 25 12 Chapter 25 Furnishings R66 Maintenance Manual 25 OCT 2010...
Page 266: ...Intentionally Blank Page 28 ii Chapter 28 Fuel System R66 Maintenance Manual 25 OCT 2010...
Page 276: ...FIGURE 28 4 FUEL VALVE Page 28 10 Chapter 28 Fuel System R66 Maintenance Manual 25 OCT 2010...
Page 280: ...Intentionally Blank Page 32 ii Chapter 32 Landing Gear R66 Maintenance Manual SEP 2012...
Page 306: ...Intentionally Blank Page 52 ii Chapter 52 Doors and Windows R66 Maintenance Manual 25 OCT 2010...
Page 311: ...Intentionally Blank 25 OCT 2010 R66 Maintenance Manual Chapter 52 Doors and Windows Page 52 5...
Page 315: ...Intentionally Blank 25 OCT 2010 R66 Maintenance Manual Chapter 52 Doors and Windows Page 52 9...
Page 320: ...Intentionally Blank Page 53 ii Chapter 53 Fuselage R66 Maintenance Manual 25 OCT 2010...
Page 326: ...FIGURE 53 2 LOWER FRAMES Page 53 6 Chapter 53 Fuselage R66 Maintenance Manual 25 OCT 2010...
Page 344: ...Intentionally Blank Page 62 ii Chapter 62 Main Rotor R66 Maintenance Manual 25 OCT 2010...
Page 357: ...Intentionally Blank 25 OCT 2010 R66 Maintenance Manual Chapter 62 Main Rotor Page 62 13...
Page 388: ...Intentionally Blank Page 64 ii Chapter 64 Tail Rotor R66 Maintenance Manual 25 OCT 2010...
Page 402: ...Intentionally Blank Page 64 14 Chapter 64 Tail Rotor R66 Maintenance Manual 25 OCT 2010...
Page 418: ...Intentionally Blank Page 67 ii Chapter 67 Flight Controls R66 Maintenance Manual MAR 2012...
Page 446: ...Intentionally Blank Page 71 ii Chapter 71 Powerplant R66 Maintenance Manual SEP 2012...
Page 448: ...Page 71 2 Chapter 71 Powerplant R66 Maintenance Manual SEP 2012 FIGURE 71 1 ENGINE RIGHT SIDE...
Page 450: ...Page 71 4 Chapter 71 Powerplant R66 Maintenance Manual SEP 2012 FIGURE 71 2 ENGINE LEFT SIDE...
Page 456: ...FIGURE 71 3 INDUCTION Page 71 10 Chapter 71 Powerplant R66 Maintenance Manual SEP 2012...
Page 459: ...Intentionally Blank SEP 2012 R66 Maintenance Manual Chapter 71 Powerplant Page 71 13...
Page 460: ...FIGURE 71 4 EXHAUST Page 71 14 Chapter 71 Powerplant R66 Maintenance Manual SEP 2012...
Page 464: ...Intentionally Blank Page 71 18 Chapter 71 Powerplant R66 Maintenance Manual SEP 2012...
Page 468: ...Intentionally Blank Page 75 2 Chapter 75 Engine Air Systems R66 Maintenance Manual 25 OCT 2010...
Page 470: ...Intentionally Blank Page 76 ii Chapter 76 Engine Controls R66 Maintenance Manual 25 OCT 2010...
Page 478: ...Intentionally Blank Page 76 8 Chapter 76 Engine Controls R66 Maintenance Manual 25 OCT 2010...
Page 480: ...Intentionally Blank Page 79 ii Chapter 79 Engine Oil System R66 Maintenance Manual SEP 2012...
Page 490: ...Intentionally Blank Page 95 ii Chapter 95 Instrument System R66 Maintenance Manual 25 OCT 2010...
Page 498: ...Intentionally Blank Page 95 8 Chapter 95 Instrument System R66 Maintenance Manual 25 OCT 2010...
Page 500: ...Intentionally Blank Page 96 ii Chapter 96 Electrical System R66 Maintenance Manual SEP 2012...
Page 512: ...Intentionally Blank Page 96 12 Chapter 96 Electrical System R66 Maintenance Manual SEP 2012...
Page 514: ...Intentionally Blank Page 98 ii Chapter 98 Wiring Diagrams R66 Maintenance Manual SEP 2012...
Page 518: ...Page 98 4 Chapter 98 Wiring Diagrams R66 Maintenance Manual SEP 2012 Intentionally Blank...
Page 520: ...Intentionally Blank Page 98 6 Chapter 98 Wiring Diagrams R66 Maintenance Manual SEP 2012...
Page 522: ...Page 98 8 Chapter 98 Wiring Diagrams R66 Maintenance Manual SEP 2012 Intentionally Blank...
Page 524: ...Intentionally Blank Page 98 10 Chapter 98 Wiring Diagrams R66 Maintenance Manual SEP 2012...
Page 526: ...Intentionally Blank Page 98 12 Chapter 98 Wiring Diagrams R66 Maintenance Manual SEP 2012...
Page 528: ...Intentionally Blank Page 99 ii Chapter 99 Special Tools R66 Maintenance Manual 25 OCT 2010...
Page 532: ...FIGURE 99 2 SPECIAL TOOLS Page 99 4 Chapter 99 Special Tools R66 Maintenance Manual SEP 2012...
Page 534: ...Page 99 6 Chapter 99 Special Tools R66 Maintenance Manual SEP 2012 FIGURE 99 3 SPECIAL TOOLS...
Page 536: ...Intentionally Blank Page 100 ii Chapter 100 Revision Log R66 Maintenance Manual SEP 2012...