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content: add explanations for 737.14 (#191)
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PupoSDC authored Feb 21, 2024
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41 changes: 41 additions & 0 deletions libs/content/question-bank-type/content/B737/B737.14/page.md
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Expand Up @@ -8,3 +8,44 @@ title: "Landing Gear"
**Note**: This is just a summary of the FCOM content that regularly shows up in
Type Rating exams. For an overview of the systems in this chapter, check the
FCOM

## GEAR WARNING LIGHT

Illuminates red when:

- Gear is in transit
- Gear lever position disagrees with landing gear position
- Gear is not down and locked below 800ft RA with either thrust lever in idle

## LANDING GEAR TRANSFER UNIT

The landing gear retraction normally uses hydraulic system A. The landing gear
transfer unit uses hydraulic system B to aid in retraction in certain
conditions:

- Aircraft is airborne
- Engine N°1 RPM is below a limiting value (engine 1 failed)
- Landing gear lever is selected up
- Either main landing gear is not up and locked

## BRAKES / AUTOBRAKES

Normal brakes use hydraulic system B for operation. If system B is not
available, alternate brakes use system A. If hydraulic system A & B are lost,
then the brake accumulator can supply limited pressure for brake operation.

Autobrake provides automatic maximum braking in the event of an RTO or
preselected braking during landing. Autobrake is only available with normal
brakes. The antiskid system is available with normal and alternate brakes.
Autobrake RTO will engage only above 90kt wheel speed.

## ANTI SKID SYSTEM

The anti-skid system prevents locked wheels by comparing the wheel speed of the
two inboard main wheels and the two outboard main wheels. When a locked
condition is sensed, brake pressure to the slower wheel is released. The
anti-locking system is available only above 25 kt.

The anti-skid system releases brake pressure to a wheel sensed in a skid
situation. Protection against hydroplaning is available for wheels 1 & 3; it is
detected when the wheel speed is 50kt below GS.
118 changes: 87 additions & 31 deletions libs/content/question-bank-type/content/B737/B737.14/questions.yaml
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Expand Up @@ -4,23 +4,39 @@
annexes: []
learningObjectives:
- B737.14
explanation: ""
explanation: |
> With RTO selected, if the takeoff is rejected prior to wheel speed reaching 88
> knots autobraking is not initiated, the AUTO BRAKE DISARM light does not
> illuminate and the RTO autobrake function remains armed. If the takeoff is
> rejected after reaching a wheel speed of 88 knots, maximum braking is applied
> automatically when the forward thrust levers are retarded to IDLE.
**NOTE**: Older sources will state 90kts. This has been corrected by boeing
to 88kts.
variant:
type: true-or-false
question: With RTO selected, the system will automatically apply maximum brake
pressure when the thrust levers have been retarded to idle with speed at
or above 90 kts.
or above 88 kts.
answer: true
- id: QVJKJIXL
relatedQuestions: []
externalIds: []
annexes: []
learningObjectives:
- B737.14
explanation: ""
explanation: |
> ### Antiskid Protection
>
> Antiskid protection is provided in the normal and alternate brake systems.
> The normal brake hydraulic system provides each main gear wheel with
> individual antiskid protection. When the system detects a skid, the associated
> antiskid valve reduces brake pressure until skidding stops. **The alternate brake
> hydraulic system works similar to the normal system however antiskid protection
> is applied to main gear wheel pairs instead of individual wheels**.
variant:
type: simple
question: Which of the following statements are false for Antiskid Protection.
question: Which of the following statements is false for Antiskid Protection.
options:
- id: l6qp1
text: All of the above are false.
Expand All @@ -47,10 +63,16 @@
annexes: []
learningObjectives:
- B737.14
explanation: ""
explanation: |
> ### Nose Wheel Steering
>
> Nose wheel steering is available when the nose gear is in the down position and
> compressed by weight of the airplane. (...) Alternate nose wheel steering can
> be activated to provide system B pressure to the nose wheels when the NOSE
> WHEEL STEERING switch is placed to ALT
variant:
type: simple
question: Which of the following statements are true for the Nose Wheel Steering
question: Which of the following statements is true for the Nose Wheel Steering
system
options:
- id: mgdwv
Expand Down Expand Up @@ -85,7 +107,13 @@
annexes: []
learningObjectives:
- B737.14
explanation: ""
explanation: |
> ### Brake Accumulator
>
> The brake accumulator is pressurized by hydraulic system B. If both normal and
> alternate brake system pressure is lost, trapped hydraulic pressure in the brake
> accumulator can still provide several braking applications or parking brake
> application.
variant:
type: true-or-false
question: If both normal and alternative brake system pressure is lost it is
Expand All @@ -98,7 +126,21 @@
annexes: []
learningObjectives:
- B737.14
explanation: ""
explanation: |
### Normal landing gear extension is possible if Hydraulic system A operational.
> Hydraulic power for retraction, extension, and nose wheel steering is normally
> supplied by hydraulic system A.
### The landing gear cannot be retracted.**
🙃
### The landing gear can be manually lowered with the landing gear lever in ANY position.
> With the manual extension access door open:
> - manual landing gear extension is possible with the LANDING GEAR
> lever in any position
variant:
type: simple
question: Which of the following statements is true, when the landing gear
Expand All @@ -114,12 +156,12 @@
correct: false
why: ""
- id: n31g5
text: The landing gear can be manually lowered with the lnding gear lever in ANY
position.
text: The landing gear can be manually lowered with the landing gear lever in
ANY position.
correct: false
why: ""
- id: t45rw
text: All of the above are true
text: All of the options are true
correct: true
why: ""
- id: QLLLRAKQ
Expand All @@ -128,7 +170,13 @@
annexes: []
learningObjectives:
- B737.14
explanation: ""
explanation: |
> ### Parking Brake
>
> The parking brake can be set with either A or B hydraulic systems pressurized. If
> A and B hydraulic systems are not pressurized, parking brake pressure is
> maintained by the brake accumulator. Accumulator pressure is shown on the HYD
> BRAKE PRESS indicator.
variant:
type: simple
question: Which hydraulic system operates the parking brake?
Expand All @@ -146,7 +194,7 @@
correct: false
why: ""
- id: 0zhxz
text: All of the above.
text: All options are correct
correct: true
why: ""
- id: QPSGIJCR
Expand All @@ -155,7 +203,12 @@
annexes: []
learningObjectives:
- B737.14
explanation: ""
explanation: |
> ### Landing Gear Indicator Lights (overhead)
>
> Note: Landing gear is down and locked as long as one green landing gear
> indicator light (center panel or overhead panel) for each gear is
> illuminated.
variant:
type: true-or-false
question: The landing gear lights on the main centre panel all indicate green,
Expand All @@ -169,7 +222,17 @@
annexes: []
learningObjectives:
- B737.14
explanation: ""
explanation: |
> ### AUTO BRAKE DISARM Light
> Illuminated (amber) –
> - SPEED BRAKE lever moved to down detent during RTO or landing
> - manual brakes applied during RTO or landing
> - thrust lever(s) advanced during RTO or landing
> - except during first 3 seconds after touchdown for landing
> - landing made with RTO selected
> - **RTO mode selected on ground**
> - **illuminates for one to two seconds then extinguishes**
> - a malfunction exists in automatic braking system.
variant:
type: simple
question: You select the AUTO BRAKE to RTO on the ground, and the AUTO BRAKE
Expand Down Expand Up @@ -200,27 +263,16 @@
annexes: []
learningObjectives:
- B737.14
explanation: |+
explanation: |
> **Autobrake – Disarm**
>
> The pilots may disarm the autobrake system by moving the selector switch to the
> OFF position. This action does not cause the AUTO BRAKE DISARM light to
> illuminate. After braking has started, any of the following pilot actions disarm the
> system immediately and illuminate the AUTO BRAKE DISARM light:
> • moving the SPEED BRAKE lever to the down detent
> • advancing the forward thrust lever(s), except during the first 3 seconds after touchdown for landing
> • applying manual brakes.
---
> - moving the SPEED BRAKE lever to the down detent
> - advancing the forward thrust lever(s), except during the first 3 seconds after touchdown for landing
> - applying manual brakes.
variant:
type: simple
question: Other than moving the Autobrake selector to OFF, how else can
Expand Down Expand Up @@ -251,7 +303,11 @@
annexes: []
learningObjectives:
- B737.14
explanation: ""
explanation: |
> ### Manual Gear Extension Handles
>
> Right main, nose, left main – Each landing gear uplock is released when related
> handle is pulled to its limit, approximately 24 inches (61 cm).
variant:
type: simple
question: How far must you pull the emergency gear release handle before the
Expand Down

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