Term
| SINGLE- OR DUAL-ENGINE FAILURE |
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Definition
| All parameters decreasing and Nf -Nr split |
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Term
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Definition
AFF ENG: T5 increase — All other parameters decrease
NORM ENGINE: All parameters increase except for steady Nf/Nr.
(As long as the affected engine is producing any usable torque, Nf will remain matched with the normal Nf/Nr. If torque drops to zero, Nf will likely split off and decay.) |
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Term
| ENGINE POWER LOSS (FLAME OUT) |
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Definition
SYMPTOM: All engine parameters decreasing.
(if producing some torque- Nf/Nr will remain matched |
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Term
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Definition
| SYMPTOM-All parameters increasing, fuel flow may jump to 1,700 pounds or more. |
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Term
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Definition
SYMPTOM: (FAIL BETWEEN Nf AND NGB)
a.Sudden decrease to zero on Nf and torque indicators.
b. Ng and T5 increasing until overspeed system actuation, then T5 decreasing and Ng decreasing to flight idle.
c. Grinding/howling noise may be heard.
FAIL OF TRANS -a. Ng, T5 — Decrease.
b.Nf — May increase to overspeed cut in (110% ±2%), then decrease with Ng stabilizing at flight idle speed.
c.Torque — Decrease to zero. |
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Term
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Definition
| Indications would be a rise in T5 above 320 _C after shutdown and/or excessive smoke from the engine exhaust outlet. |
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Term
| Hydraulic Fire in Main Rotor Pylon |
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Definition
| indicated by white smoke and/or flames in the vicinity of the main transmission and/or by illumination of a number of unassociated caution lights. |
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Term
| Utility Hydraulic System Failure |
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Definition
(1) The UTIL HYD PRESS gauge on the instrument panel, redlined at 2,600 psi minimum or 3,300 maximum;
(2) the UTILITY PRESS caution light that goes on when hydraulic pressure drops below 1,500 psi;
(3) the UTILITY OIL HOT caution light that goes on when the hydraulic fluid temperature rises to 107 _C; and
(4) the UTILITY QTY T/R caution light that goes on when reservoir quantity drops to an unsatisfactory level. |
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Term
| Flight Control Hydraulic System Failure |
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Definition
1) 1ST and 2ND STAGE HYD PRESS gauges on the instrument panel redlined at 2,600 psi minimum or 3,300 psi maximum,
(2) the 1 STG PRESS M/R T/R and 2 STG PRESS M/R caution lights that go on when pressure drops below 2,000 psi,
(3) the 1 STG QTY M/R T/R and 2 STG QTY M/R caution lights that go on when reservoir fluid quantity drops to an unsatisfactory low level, and
(4) the 2 STG OIL HOT caution light that goes on when the second stage hydraulic fluid temperature rises to 107 _C. |
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Term
| Primary Tandem Servo Malfunction |
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Definition
| 1 STG M/R SERVO BYPASS or 2 STG M/R SERVO BYPASS caution lights that go on when a servo has malfunctioned in such a manner to cause it to bypass hydraulic pressure or it has lost system pressure. |
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Term
| Tail Rotor Tandem Servo Malfunction |
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Definition
| 1 STG T/R SERVO BYPASS and 2 STG T/R SERVO BYPASS caution lights that go on when the servo has malfunctioned in such a manner to cause it to bypass hydraulic pressure or it has lost system pressure. |
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Term
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Definition
| abnormal noise/ may also be indicated by an unusual yaw kick accompanied by fluctuations in the torquemeters. |
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Term
| Main Gearbox Chip Locator Light |
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Definition
| When the CHIP DETECTED caution light is accompanied by the MAIN GB chip locator light on the chip locator panel, progressive failure of the main gearbox may be occurring. |
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Term
| Main Gearbox Oil System Failure |
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Definition
| f the MGB OIL PRESS and the MGB AUX lube pump caution lights both illuminate and the MGB oil pressure drops rapidly or decreases below minimum, the main gearbox has lost all means of lubrication |
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Term
| Free Wheeling Unit Failure |
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Definition
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Term
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Definition
1. abnormal noise or change in noise frequency.
2.A malfunction that would cause a binding or restriction within the gearbox will cause a high engine torque reading to be observed.
3.A malfunction that would cause a no-load condition on the engine should produce a tendency for the engine to overspeed |
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Term
| Nose Gearbox Chip Locator Light |
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Definition
| CHIP DETECTED caution light is accompanied by either of the nose gearbox chip locator lights, |
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Term
| Nose Gearbox Oil System Failure |
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Definition
| indicated by the nose gearbox oil temperature gauge and oil temperature and pressure caution lights. |
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Term
| Intermediate or Tail Gearbox Failure and Chip Light |
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Definition
| chip light and the TGB/IGB OIL PRESS caution lights |
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Term
| ENGINE CHIP LOCATOR LIGHT |
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Definition
| An engine chip locator light accompanied by unusual vibrations and/or low oil pressure/high oil temperature, or an engine chip locator light returning after resetting circuit breaker |
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Term
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Definition
| Indicated by abnormal noise and loss or malfunction of AGB systems (1&3 Gens/ Engine start pump/ AGB oil pump/2nd stage hyd pump/ Utility Hyd pump) |
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