DAILY OR PREFLIGHT CHECKS

Remove ground handling wheels and all covers and tiedowns. Remove even small accumulations of frost, ice, or snow, especially from rotor blades. Check maintenance records to verify aircraft is airworthy. Check general condition of aircraft and verify no visible damage, fluid leakage, or abnormal wear. Verify no fretting at rivets and seams where parts are joined together. Fretting of aluminum parts produces a fine black powder while fretting of steel parts produces a reddish-brown or black residue. Verify Telatemps show no temperature increase that cannot be attributed to a change in operating conditions (mechanics draw a reference line to the right of the highest temperature square which has darkened in operation). Verify torque stripes on critical fasteners are not broken or missing.

DAILY OR PREFLIGHT CHECKS


1. COWL DOORS

  • BATTERY SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ON
  • OIL PRESSURE AND ALTERNATOR LIGHTS . . . . . . . . . . . . . . . . ON
  • WARNING LIGHT TEST SWITCHES . . . . . . . . . . . . . PUSH TO TEST
  • FUEL QUANTITY . . . . . . . . . . . . . . . . . . . . . . . CHECK GAGES
  • BATTERY SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OFF
  • AUX FUEL TANK QUANTITY . . . . . . . . . . . . . . . . . . . . . CHECK
  • FUEL FILLER CAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TIGHT
  • AUX FUEL TANK . . . . . . . . . . . . . . . . . . . . . . . . . . NO LEAKS
  • FUEL LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NO LEAKS
  • FUEL TANK SUMP DRAIN(S) . . . . . . . . . . . . . . . . . . . SAMPLE
  • GEARBOX OIL . . . . . . . . . . . . . . . . . . . . . . . . FULL, NO LEAKS
  • ROTOR BRAKE . . . . . . . . . . . . . . . . . . . . ACTUATION NORMAL
  • FLEX COUPLING . . . . . . . . . . . . . . . . NO CRACKS, NUTS SECURE
  • YOKE FLANGES . . . . . . . . . . . . . . . . . . . . . . . . . NO CRACKS
  • GEARBOX TELATEMP . . . . . . . . . . . . . . . . . . . . . . . NORMAL
  • SPRAG CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . . NO LEAKS
  • STATIC SOURCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CLEAR
  • CONTROL ROD ENDS . . . . . . . . . . . . FREE WITHOUT LOOSENESS
  • STEEL TUBE FRAME . . . . . . . . . . . . . . . . . . . . . . NO CRACKS
  • ALL FASTENERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . SECURE
  • TAIL ROTOR CONTROL . . . . . . . . . . . . . . . . . . NO INTERFERENCE
  • COWL DOORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . LATCHED


2. ENGINE RIGHT SIDE

  • CARB AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . SECURE
  • CARB HEAT SCOOP . . . . . . . . . . . . . . . . . . . . . . . . . SECURE
  • ENGINE SHEET METAL . . . . . . . . . . . . . . . . . . . . . NO CRACKS
  • ELECTRICAL TERMINALS . . . . . . . . . . . . . . . . . . . . . . . . TIGHT
  • FUEL LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NO LEAKS
  • OIL COOLER DOOR . . . . . . . . . . . . . . . . . . . . . . . . . . . CHECK
  • OIL LINES . . . . . . . . . . . . . . . . . . . . . . NO LEAKS OR CHAFING
  • EXHAUST SYSTEM . . . . . . . . . . . . . . . . . . . . . . . NO CRACKS
  • ENGINE GENERAL CONDITION . . . . . . . . . . . . . . . . . . . CHECK
  • V-BELT CONDITION . . . . . . . . . . . . . . . . . . . . . . . . . . CHECK
  • V-BELT SLACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CHECK
  • SPRAG CLUTCH . . . . . . . . . . . . . . . . . . . . . . . . . . NO LEAKS
  • UPPER BEARING . . . . . . . . . . . . . . . . . . . . . . . . . NO LEAKS
  • TELATEMP – UPPER BEARING . . . . . . . . . . . . . . . . . . NORMAL
  • UPPER SHEAVE CONDITION . . . . . . . . . . . . . . . . . . . . CHECK
  • LOWER SHEAVE GROOVE WEAR . . . . . . . . SMOOTH & UNIFORM
  • FLEX COUPLING . . . . . . . . . . . . . . . . NO CRACKS, NUTS SECURE
  • YOKE FLANGES . . . . . . . . . . . . . . . . . . . . . . . . . . NO CRACKS
  • STEEL TUBE FRAME . . . . . . . . . . . . . . . . . . . . . . . NO CRACKS
  • TAIL ROTOR CONTROL . . . . . . . . . . . . . . . . . . . NO INTERFERENCE

3. ENGINE REAR

  • COOLING FAN NUT . . . . . . . . . . . . . . . PIN IN LINE WITH MARKS
  • COOLING FAN . . . . . . . . . . . . . . . . . . . . . . . . . . . NO CRACKS
  • FAN SCROLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . NO CRACKS
  • TELETEMPS – LOWER BEARING . . . . . . . . . . . . . . . . . NORMAL
  • LOWER BEARING . . . . . . . . . . . . . . . . . . . . . . . . . . NO LEAKS

4. EMPENNAGE

  • TAIL SURFACES . . . . . . . . . . . . . . . . . . . . . . . . . . NO CRACKS
  • FASTENERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SECURE
  • POSITION LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CHECK

5. TAIL ROTOR

  • GEARBOX TELATEMP . . . . . . . . . . . . . . . . . . . . . . . . NORMAL
  • GEARBOX . . . . . . . . . . . . . . . . . . . . . . OIL VISIBLE, NO LEAKS
  • BLADES . . . . . . . . . . . . . . . . CLEAN AND NO DAMAGE/CRACKS
  • PITCH LINKS . . . . . . . . . . . . . . . . . . . . . . . . . NO LOOSENESS
  • TEETER BEARINGS . . . . . . . . . . . . . . . . . . . CHECK CONDITION
  • TEETER BEARING BOLT . . . . . . . . . . . . . . . . . DOES NOT ROTATE
  • CONTROL BELLCRANK . . . . . . . . . . . . . FREE WITHOUT LOOSENESS

6. TAILCONE

  • SKINS . . . . . . . . . . . . . . . . . . . . . . . . . NO CRACKS OR DENTS
  • STROBE LIGHT CONDITION . . . . . . . . . . . . . . . . . . . . . . CHECK
  • ANTENNA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CHECK


7. ENGINE LEFT SIDE

  • ENGINE OIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 QT
  • OIL FILTER (IF INSTALLED) . . . . . . . . . . . . . . . SECURE, NO LEAKS
  • FUEL LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NO LEAKS
  • GASCOLATOR DRAIN . . . . . . . . . . . . . . . . . . . . . . . . . SAMPLE
  • THROTTLE LINKAGE . . . . . . . . . . . . . . . . . . . . . . . . OPERABLE
  • BATTERY AND RELAY (IF LOCATED HERE) . . . . . . . . . . . . SECURE
  • ALTERNATOR BELT TENSION . . . . . . . . . . . . . . . . . . . . . CHECK
  • STEEL TUBE FRAME . . . . . . . . . . . . . . . . . . . . . . . NO CRACKS
  • ENGINE SHEET METAL . . . . . . . . . . . . . . . . . . . . . NO CRACKS
  • EXHAUST SYSTEM . . . . . . . . . . . . . . . . . . . . . . . NO CRACKS
  • ENGINE GENERAL CONDITION . . . . . . . . . . . . . . . . . . . . CHECK

8. MAIN FUEL TANK

  • QUANTITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CHECK
  • FILLER CAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TIGHT
  • LEAKAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NONE

9. MAIN ROTOR

CAUTION

DO NOT PULL DOWN ON BLADES TO TEETER
ROTOR. TO LOWER A BLADE, PUSH UP ON
OPPOSITE BLADE.

  • BLADES . . . . . . . . . . . . . . . . CLEAN AND NO DAMAGE/CRACKS

CAUTION

VERIFY EROSION ON LOWER SURFACE OF
BLADES HAS NOT EXPOSED SKIN-TO-SPAR
BOND LINE. REFERENCE ROTOR SYSTEMS
DESCRIPTION IN SECTION 7.

  • PITCH CHANGE BOOTS . . . . . . . . . . . . . . . . . . . . . NO LEAKS
  • MAIN HINGE BOLTS . . . . . . . . . . . . . . . COTTER PINS INSTALLED
  • ALL ROD ENDS . . . . . . . . . . . . . . . . FREE WITHOUT LOOSENESS
  • ALL FASTENERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . SECURE
  • SWASHPLATE SCISSORS . . . . . . . . . NO EXCESSIVE LOOSENESS
10. FUSELAGE LEFT SIDE
  • BAGGAGE COMPARTMENT . . . . . . . . . . . . . . . . . . CHECK
  • REMOVABLE CONTROLS . . . . . . . . . . . . SECURE IF INSTALLED
  • COLLECTIVE CONTROL . . . . . . . . . . . . . . . . . . . . . . CLEAR
  • SEAT BELT . . . . . . . . . . . CHECK CONDITION AND FASTENED
  • DOOR . . . . . . . . . . . . . . . . . . . . UNLOCKED AND LATCHED
  • DOOR HINGE SAFETY PINS . . . . . . . . . . . . . . . . . INSTALLED
  • LANDING GEAR . . . . . . . . . . . . . . . . . . . . . . . . . CHECK
  • POSITION LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . CHECK
11. NOSE SECTION
  • PITOT TUBE . . . . . . . . . . . . . . . . . . . . . . . . . . . . CLEAR
  • WINDSHIELD CONDITION AND CLEANLINESS . . . . . . . . CHECK
  • LANDING LIGHTS . . . . . . . . . . . . . . . . . . . . . . . . CHECK
  • YAW STRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CHECK
12. FUSELAGE RIGHT SIDE
  • LANDING GEAR . . . . . . . . . . . . . . . . . . . . . . . . . CHECK
  • POSITION LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . CHECK
  • DOOR HINGE SAFETY PINS . . . . . . . . . . . . . . . . . INSTALLED
  • BAGGAGE COMPARTMENT . . . . . . . . . . . . . . . . . . CHECK
13. CABIN INTERIOR
  • LOOSE ARTICLES . . . . . . . . . . . . . . . REMOVED OR STOWED
  • SEAT BELT . . . . . . . . . . . . . . . . . . . . . CHECK CONDITION
  • INSTRUMENTS, SWITCHES, AND CONTROLS . . CHECK CONDITION
  • CLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . FUNCTIONING

CAUTION

FOR HELICOPTERS WITH REMOVABLE CONTROLS,
REMOVE LEFT SEAT CONTROLS IF PERSON
IN THAT SEAT IS NOT A RATED HELICOPTER
PILOT.

CAUTION

BE SURE ROTOR BLADES ARE APPROXIMATELY
LEVEL TO AVOID POSSIBLE TAILCONE STRIKE.

CAUTION

WHEN FLYING SOLO, FILL LEFT BAGGAGE COMPARTMENT
TO CAPACITY BEFORE USING RIGHT COMPARTMENT.
AVOID PLACING OBJECTS IN COMPARTMENTS WHICH
COULD INJURE OCCUPANT IF SEAT COLLAPSES DURING
A HARD LANDING.

CAUTION

SHORTER PILOTS MAY REQUIRE CUSHION TO OBTAIN
FULL TRAVEL OF ALL CONTROLS. VERIFY AFT CYCLIC
TRAVEL IS NOT RESTRICTED.

BEFORE STARTING ENGINE

  • Seat belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fastened
  • Fuel shut-off valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ON
  • Cyclic/collective friction . . . . . . . . . . . . . . . . . . . . . . . . OFF
  • Cyclic, collective, pedals . . . . . . . . . . . . . . . Full travel free
  • Throttle . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full travel free
  • Collective . . . . . . . . . . . . . . . . . . . . . Full down, friction ON
  • Cyclic . . . . . . . . . . . . . . . . . . . . . . . . . . Neutral, friction ON
  • Pedals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Neutral
  • Rotor brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disengaged
  • Circuit breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . In
  • Carb heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OFF
  • Mixture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full rich
  • Mixture guard* . . . . . . . . . . . . . . . . . . . . . . . . . . . Installed
  • Primer (if installed) . . . . . . . . . . . . . . . . . . Down and locked
  • Landing lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OFF
  • Avionics switch (if installed) . . . . . . . . . . . . . . . . . . . . . OFF
  • Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disengaged
  • Altimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Set
  • Governor switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ON

* Mixture guard is not used on aircraft with vernier mixture control on console face.

STARTING ENGINE & RUNUP (Headset-off one ear)

  • Throttle twists for priming . . . . . . . . . . . . . . . . As required
  • Throttle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Closed
  • Battery, strobe switches . . . . . . . . . . . . . . . . . . . . . . . . ON
  • Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clear
  • Ignition switch . . . . . . . . . . . . . . . . . . . . . . Start, then Both
  • Starter-On light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Out
  • Set engine RPM . . . . . . . . . . . . . . . . . . . . . . . . . 50 to 60%
  • Clutch switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engaged
  • Blades turning . . . . . . . . . . . . . . . . . . . Less than 5 seconds
  • Alternator switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ON
  • Oil pressure within 30 seconds . . . . . . . . . 25 psi minimum
  • Avionics, headsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . ON
  • Audio alert (if equipped) . . . . . . . . . . . . . . . . . . . . . . . . Test
  • Wait for clutch light out . . . . . . . . . . . . . Circuit breakers in
  • Warm-up RPM . . . . . . . . . . . . . . . . . . . . . . . . . . 70 to 75%
  • Engine gages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Green
  • Mag drop at 75% RPM . . . . . . . . . . . 7% max in 2 seconds
  • Carb heat . . . . . . . . . . . . . . . CAT rise/drop, set as required
  • Sprag clutch check . . . . . . . . . . . . . . . . . . . . . Needles split
  • Doors (if installed) . . . . . . . . . . . . . . . . . Closed and latched
  • Limit MAP chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . Check
  • Cyclic/collective friction . . . . . . . . . . . . . . . . . . . . . . . . OFF
  • Governor On, increase throttle . . . . . . . . . . RPM 102-104%
  • Warning lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Out
  • Lift collective slightly, reduce RPM . . . . . Horn/light at 97%

CAUTION

FOR AIRCRAFT WHICH PROVIDE LOW RPM HORN
THROUGH THE AUDIO SYSTEM, A HEADSET FOR EACH
PILOT IS REQUIRED TO HEAR THE HORN.

CAUTION

AVOID CONTINUOUS OPERATION AT ROTOR SPEED OF
60 TO 70% TO MINIMIZE TAIL RESONANCE.

CAUTION

ON SLIPPERY SURFACES, BE PREPARED TO COUNTER
NOSE-RIGHT ROTATION WITH LEFT PEDAL AS GOVERNOR
INCREASES RPM.

TAKEOFF PROCEDURE

  • 1. Verify doors latched, governor ON, and RPM stabilized at 102 to 104%.
  • 2. Clear area. Slowly raise collective until aircraft is light on skids. Reposition cyclic as required for equilibrium, then gently lift aircraft into hover.
  • 3. Check gages in green and adjust carb heat if required.
  • 4. Lower nose and accelerate to climb speed following profile shown by height-velocity diagram in Section 5.If RPM drops below 102%, lower collective.