Event: CPT 3 |
Last updated:
7 April, 2003 1:31
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DISCUSS: |
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PROCEDURES:
1.
Autorotate
2.
Shoulder harness - Lock
If time and altitude permit:
3.
Crew/passengers - Alert
4.
Mayday - TRANSMIT on Guard
5.
Transponder - Emergency
6.
Twist grip - Close
7.
Generator - OFF
8.
Battery - OFF
(none for this event)
Generator / electrical malfunctions
MAIN GENERATER FAILURE
Indications:
Load meter zero,
GEN FAIL caution light illumination,
(B) DC voltmeter indicates battery voltage, © Voltmeter indicates
0
WARNING
• With the battery switch OFF or battery
exhaustion, both fuel boost pumps are in operative. Descend below 6,000 ft pressure
altitude and land as soon as
possible.
• With one or both boost pumps inoperative, fuel quantity below 20 gallons
shall be considered unusable.
Note
• Prior to shutting off all electrical power, the pilot
must determine the equipment that is essential to the particular light
environment
that will
be encountered (e.g. flight instruments and boost pumps).
• In the TH-57C, time of operation of ESS No. 2 bus on battery power is
approximately 40 minutes with pitot OFF and an 80% charged battery (approximately
35 minutes with pitot heat ON). To conserve battery power as needed for extended
flights or for use of landing lights at destination, turn BAT switch OFF during
flight.
• With the NORMAL/RECOVER switch on NORMAL, failure of the main generator
will result in illumination of the FUEL PUMP caution light because of loss of
power to nonessential bus.
• Resetting the bus/tie relay circuit breaker will cause the main battery
to power the nonessential us, accelerating main battery depletion.
1. GEN FIELD and GEN RESET
circuit breaker - Check in
2. MAIN GEN switch Reset, then ON
If generator power is not restored:
3. MAIN GEN switch Off
4. Unnecessary electrical equipment Off
© 5. NORMAL/Recover switch - Recover as
Desired
6. Descend below 6,000 ft
7. Land as soon as possible
If power is restored:
8. Continue flight
Note
• In the TH-57C, with the loss of the main battery after a main generator
failure, the HIS and both RMIs will be inoperative for TACAN, LOC and VOR approaches.
However, the RMIs will still provide relative ADF bearing. VMC should e attained
as soon as possible.
• Be prepared for a possible electrical and / or engine compartment fire
because of excessive wiring load or generator meltdown.
DC LOADMETER AND VOLTMETER
Indications:
Loadmeter or voltmeter fluctuates erratically, pegs or goes to zero
1. Generator - Cycle
If the problem is corrected:
2. Continue flight.
If the problem is not corrected:
3. Use generator failure procedure.
CAUTION
• Sustained loadmeter indications greater than 70 percent may be caused
by an electrical fire.
SECOND
CHIP:
If sustained
within 30 minutes of first:
7.
Land as soon as possible
If more than
30 minutes have elapsed since first:
8.
CLEAR CHIP Press
9.
Proceed as with first (Note time, continue flight)
THIRD CHIP: {if within 50 flight hours
of the first}
10.
Land as soon as possible
11.
Do NOT clear chip
Note
• All chip lights shall be documented on VID/MAF.
Chip lights signed off as PASTE do not count toward the total
number of lights in a 50 hour period {Proper main. troubleshooting
requires documentation of which plug has metal}
TRANSMISSION OIL CHIP [NATOPS 12-12]
Indications: TRANS OIL
CHIP caution light
1. Land as
soon as possible {Fly Low (10-20 ft above highest obstacle) and slow (<20
knots), be prepared for gearbox failure (should a gearbox failure occur,
your rotors will stop turning and you will fall from the sky) Minimum
power changes to minimize xmsn torque}
TAIL ROTOR CHIP [NATOPS 12-13]
Indications: T/R
CHIP caution light
1.
Land as soon as possible {Fly high (1000') and fast (80) for weathervaning,
be prepared for complete tail power loss}
WARNING
• With one or both boost pumps inoperative,
fuel quantity below 20 gallons shall be
considered unusable.
• Be prepared for complete power loss.
• Do not pull circuit breakers
in an attempt to identify the failed boost pump until below
6000 ft PA
• If an air leak exists
in the fuel lines between the boost pumps and engine, a total
loss of
boost pump pressure could cause an engine flameout.
1. Battery OFF
2. Land as soon as possible
BATTERY TEMP [NATOPS 12-12]
Indications: Battery case temp 54 +/- 3 °C
or higher, BATT TEMP caution light
1. Battery OFF
2. Flight may be continued.
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