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A landing gear position of three down and locked is indicated by three steady green position lights
with the landing gear warning light and warning tone out.
If the landing gear warning light and warning tone are out -
1. AOA indexer lights - CONFIRM ON
2. INTR LT MODE switch - CHECK DAY
3. Landing gear position lights - CHECK FLUSH
4. LT TEST switch - TEST
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V-16-3 ORIGINAL
If bulb(s) test bad -
5. It is safe to assume the landing gear is down and locked.
6. Get a visual inspection (if practical).
The approach lights should be illuminated if the landing gear is down and locked.
7. Make a minimum sink rate precautionary short field arrestment (if available).
If the landing gear warning light and warning tone are on -
1. AOA indexer lights - CONFIRM OUT
2. LDG GEAR handle - CHECK FULL DN (DO NOT CYCLE)
3. LG circuit breaker - CHECK IN
4. Get a visual inspection (if practical).
If one or more landing gear indicates unsafe, a visual inspection can only
confirm general position and obvious damage. There is no external
indication of a locked landing gear.
Only if all gear indicate unsafe -
5. LG circuit breaker - CYCLE
6. LDG GEAR handle - UP, pause, DN
The DOWNLOCK ORIDE button may need to be pushed, in order to move the handle to the UP
position. Allow the gear to reach the travel limit after each handle movement.
If any gear indicates down and locked -
5. LDG GEAR handle - DO NOT CYCLE
6. LT TEST switch - TEST (Verify that all 3 position lights and the landing gear warning light are
on).
If all bulbs test good and any gear indicates unsafe -
7. Perform Emergency Landing Gear Extension Procedure.
If any gear remains unsafe -
8. Perform positive and negative g maneuvers and gently roll and yaw aircraft to attempt to drive
the unsafe gear down and locked.
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V-16-4 ORIGINAL
If any gear remains unsafe and HYD 2A is operative -
9. LDG GEAR handle - PUSH IN then ROTATE 90° CCW
To prevent damage to the main landing gear system, the LDG GEAR
handle must be outboard (DN position) before resetting the handle from
emergency to normal.
10. LDG GEAR handle - UP, pause, DN
The DOWNLOCK ORIDE button may need to be pushed, in order to move the handle to the
UP position. Allow the gear to reach the travel limit after each handle movement.
11. Perform positive and negative g maneuvers and gently roll and yaw aircraft to attempt to drive
the unsafe gear down and locked.
12. Perform Emergency Landing Gear Extension Procedure.
13. Perform positive and negative g maneuvers and gently roll and yaw aircraft to attempt to drive
the unsafe gear down and locked.
If any gear still indicates unsafe -
14. Refer to Landing Gear Malfunction - Landing Guide chart, figure 16-1.
If the nose gear indicates unsafe, NWS may not be available.
If at any time landing gear indicates three down and locked -
14. LDG GEAR handle - DO NOT CYCLE
15. Make a minimum sink rate precautionary short field arrestment (if available).
16. Pin the landing gear after landing.
16.6 EMERGENCY LANDING GEAR EXTENSION
1. FLAP switch - HALF
2. Slow below 170 KCAS
3. LDG GEAR handle - DN
If LDG GEAR handle cannot be moved to the DN position -
4. LG circuit breaker - PULL
A1-F18EA-NFM-000
V-16-5 ORIGINAL
With LDG GEAR handle DN or UP (DN preferred) -
5. LDG GEAR handle - ROTATE 90° CLOCKWISE then PULL TO DETENT
6. Verify three down and locked.
NOTE
If the landing gear was emergency extended with the LDG GEAR
handle in the UP position, the landing gear warning light remains on
with the gear down and locked.
7. EMERG BRK handle - PULL TO DETENT (Anti-skid is not available)
If the landing gear was emergency extended with a good HYD 2A system,
emergency brakes should be selected, as failure of normal braking is
anticipated.
If HYD 2B is operative -
8. HYD ISOL switch - ORIDE (until APU ACCUM caution removed - approximately 20 seconds)
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V-16-6 ORIGINAL
Figure 16-1. Landing Gear Malfunction Ð Landing Guide (Sheet 1 of 2)
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V-16-7 ORIGINAL
Figure 16-1. Landing Gear Malfunction Ð Landing Guide (Sheet 2 of 2)
A1-F18EA-NFM-000
V-16-8 ORIGINAL
16.7 PLANING LINK FAILURE
With the landing gear down and locked, a planing link failure is indicated by a flashing LEFT or
RIGHT landing gear position light, illumination of the landing gear warning light, and annunciation
of the landing gear warning tone. Planing link failure indications may be caused by a failed planing link
proximity switch or by an actual planing link failure. If the indications are present, aircrew must
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NATOPS Flight Manual 飞行手册 2(62)
