Learjet 36A - Abnormal Engine Operation; FUEL CMPTR Light Illuminated

To Next Page

To Previous Page

FAA APPROVED 4-30-76 4-11

REISSUED 2-25-81, CHANGE 13

INVERTER FAILURE — PARTIAL AC POWER LOSS

(CONT)

If auxiliary inverter system malfunctions:

a. AUX AC BUS Circuit Breaker (ac bus) associated with failed

AC bus — Pull.

b. AUX INVERTER Bus Switch — Select opposite AC bus.

c. AUX INV Circuit Breaker (copilot’s ess bus) — Check and

reset. Allow approximately one minute cooling time before

resetting.

FAILURE OF AUXILIARY INVERTER SYSTEM (If Installed)

1. AUX INVERTER Switch — OFF.

2. L and R AUX AC BUS Circuit Breakers (ac bus) — Pull.

ABNORMAL ENGINE OPERATION

(FAN SPEED [N1] OR TURBINE SPEED [N2] DECREASING OR INAP-

PROPRIATE FOR THRUST LEVER POSITION)

Affected Engine:

1. Thrust Lever — IDLE.

2. FUEL CMPTR Switch — OFF.

3. If engine characteristics appear normal, continue flight with fuel

computer in manual mode. Follow the appropriate sections of

FUEL CMPTR LIGHT ILLUMINATED procedure, this section.

FUEL CMPTR LIGHT ILLUMINATED

Illumination of an amber FUEL CMPTR light indicates that the correspond-

ing fuel computer has failed or the corresponding FUEL CMPTR switch is

OFF. Automatic fuel regulation functions of the affected engine are lost and

engine operation reverts to fuel computer off mode. Engine instruments

must be monitored to ensure limits are maintained.

Engine thrust may tend to increase or decrease depending on ambient tem-

perature and flight conditions.

Engine acceleration with fuel computer inoperative is

much slower than with fuel computer on.

NOTE

, CHANGE