Landing gear warning horn

TM 1-1510-223-MTF

PROCEDURE

TROUBLESHOOTING

REFERENCE

LOW SPEED SYSTEMS CHECK (CONT)

(a) POWER lever - IDLE. PROP lever -

Move out of FEATHER detent to full

forward. Propeller RPM must reach

1,000 RPM in 20 seconds or less.

i. Repeat step h for other engine if required.

NOTE

The landing gear warning horn is automatically

silenced by an altitude sensing switch, provided to

silence the landing gear warning horn when above

12,500 feet.

*13. Landing gear warning horn - Check as follows:

a. POWER levers - Retard slowly, individually,

until landing gear warning horn first sounds.

*b. Turbine tachometers - Read N1 tachometers

on first hearing landing gear warning horn.

Verify that the landing gear warning horn

sounds when POWER levers are retarded

below 84 to 86% N, and airspeed is below

140 KIAS.

c. Flaps - Extend beyond APPROACH position.

Verify that the landing gear warning horn

sounds regardless of POWER lever position

(with airspeed less 140 KIAS).

d. POWER levers - Advance past 84 to 86%

N1. Check that landing gear warning horn is

armed again.

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