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737 > מבנה מטוס > Flashcards

מבנה מטוס Flashcards

1
Q

PTU

A

Power Transfer Unit - hydraulics
Supports the opration of LE flaps/slats & autoslats (B system)
Uses the power of sys A to power a hydraulic motor–driven pump, which pressurizes system B hydraulic fluid
Conditions:
- system B engine–driven pump hydraulic pressure drops below limits
- airborne
- flaps are less than 15 but not up / flaps not up.

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2
Q

Landing Gear Transfer Unit

A

The purpose of the landing gear transfer unit is to supply the volume of hydraulic fluid needed to raise the landing gear at the normal rate when system A engine–driven pump volume is lost. The system B engine–driven pump supplies the volume of hydraulic fluid needed to operate the landing gear transfer unit when all of the following conditions exist:

  • airborne
  • No. 1 engine RPM drops below a limit value
  • landing gear lever is positioned UP
  • either main landing gear is not up and locked.
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3
Q

Standby Hydraulic System

A

thrust reversers
• rudder
• leading edge flaps and slats (extend only)
• standby yaw damper.

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4
Q

What are the conditions for Automatic Operation of the standby hyd system

A

Automatic operation is initiated when the following conditions exist:
• loss of system A or B, and
• flaps extended, and
• airborne, or wheel speed greater than 60 kts, and
• FLT CONTROL switch A or B Hydraulic System ON OR:
• the main PCU Force Fight Monitor (FFM) trips

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5
Q

Variations in Hydraulic Quantity Indications

A

During normal operations, variations in hydraulic quantity indications occur when:

  • the system becomes pressurized after engine start
  • raising or lowering the landing gear or leading edge devices
  • cold soaking occurs during long periods of cruise. These variations have little effect on systems operation.

If the hydraulic system is not properly pressurized, foaming can occur at higher altitudes. Foaming can be recognized by pressure fluctuations and the blinking of the related LOW PRESSURE lights. The MASTER CAUTION and HYD annunciator lights may also illuminate momentarily.

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6
Q

Where is the FUEL Temperature (TEMP) Indicator?

A

Indicates fuel temperature in No. 1 tank.

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7
Q

What is special with the Center Tank FUEL PUMP LOW PRESSURE Lights?

A

Illuminated (amber) – fuel pump output pressure is low and FUEL PUMP switch is ON. Extinguished – fuel pump output pressure is normal, or FUEL PUMP switch is OFF.
Each center tank pump will automatically shut off, after a short delay, when that pump’s sensor detects low output pressure.

Main Tank FUEL PUMP LOW PRESSURE Lights: Illuminated (amber) – fuel pump output pressure is low, or FUEL PUMP switch is OFF.

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8
Q

Short field performance

A

קיצור זמן ירידת סל”ד לסרק על הקרקע

ל

-

2

שניות.

FLAP LOAD RELIEF עובד החל ממדפים 10 (במקום ממדפים AUTO SLATS

.)30 עובד בכל מצבי מדפי ההמראה (עד מדפים 25) במקום עד 60

.5

מעלות (במקום

38

במטוסים

LE SLATS נשארים במצב ביניים עד מדפים 25 (מדפי המראה) במקום עד 5.

רגילים).

זווית מוגדלת של כל הספויילרים על הקרקע עד

Tail Skid

דו מצבי (פרט למטוסי

800w.1

), להמראה מקופל, לנחיתה פרוס 5

ערכה הכוללת:

כל מטוסי ה 900 הם SFP (שדה קצר) וגם H/J/L (מטוסי 800w.1 = 800 בFMC).

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9
Q

Load relief

A

The Flap Slat Electronic Unit (FSEU) provides a TE flap load relief function which protects the flaps from excessive air loads. This function is operative at the flaps 30 and flaps 40 positions only. The FLAP lever does not move, but the flap position indicator displays flap retraction and re–extension.

Retract 1KT above placard limit and re-extend 4KT below the limit

SFP (900 and HJL) provide flap 10-40 load relief

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10
Q

Autoslats

A

Non SFP: At flap positions 1, 2, and 5 the LE slats move to full extended if the airplane approaches a stall condition
SFP: same with flap 1-25

Note: PTU provides alternate source of hyd power from sysA using fluid of sysB (loss of high volume eng-driven pump)

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11
Q

Speed trim

A

מסייע בהטסה עי קיזוז הפוך למהירות כאשר ט״א לא מוצמד במהירויות נמוכות (100 ועד 0.6 מאך) במשקלים נמוכים ומרכז כובד אחורי
נכנס לפעולה 10 שניות אחרי המראה ו-5 שניות אחרי קיזוז אחרון
עובד בהמראה, טיפוס וה״ס
Speed trim system - STS

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12
Q

Mach trim

A

System that provide SPEED STABILITY at higher mach (0.615) by adjusting the ELEVATORS with respect to the STABILZER as speed INCREASES

The Mach trim actuator repositions the elevator feel and centering unit which adjusts the control column neutral position.

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13
Q

Gear warning

A 
A steady warning horn. Alerting on landing any gear is not down and locked. 
Activated by forward thrust lever and flap position
Flaps up-25: gear not down & Thrust lever idle-20 deg or 34 deg in case one engine
Landing flaps (30, 40) whenever gear not down

The aural indication cannot be silenced with the cutout switch at flaps greater than 10

Red light illuminated: gear disagree with LG lever position or below 800’, thrust levers in idle and gear is not down and locked

EGPWS “TOO LOW GEAR” - Unsafe terrain clearance at low airspeed with landing gear not down

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14
Q

PSEU

A 
The PSEU monitors the following systems:
• takeoff configuration warnings
• landing configurations warnings
• landing gear
• air/ground sensing

The PSEU light is inhibited:
• in flight
• when the thrust levers are advanced toward takeoff power
• for 30 seconds after landing.

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15
Q

All generators inop

A

All left side (captain) displays and compact engine

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16
Q

Carbon vs steel brakes

A

During landing, one hard, high energy, long-duration brake application produces the same amount of wear as a light, low-energy, short application. This is different from steel brakes that wear as a function of the energy input during the stop.

Anything else?

17
Q

Autobrake application on landing starts when

A

After landing, autobrake application begins when:

  • both forward thrust levers are retarded to IDLE
  • the main wheels spin–up.
18
Q

Air/ground system

A 
The system receives air/ground logic signals from six sensors
two on each landing gear. This defines the appropriate air or ground status
Affected systems:
Emergency exit doors
Pressurization
Autothrottle
TOGA (to vs ga)
Thrust reverser
Speedbrake
Autobrakes
LG lever lock (solonoid)
Stall warning
LNAV VNAV
19
Q

Oxygen - types of oxygen bottles

A

Crew: 115psi bottle. Max 1850 min according to table. 100% is for emergency descent or fumes
Cabin: PSU for 12 min. PSU4 in each line (one extra for baby), PSU 2 each in toilet, 2 for each jumpseat
Cabin: 8 PBE - Portable Breathing Equip. Each has 2 masks
4 hoods for fire fighting, provides 15-20 oxygen

20
Q

מצתים - איך פועלים במצבים השונים ומתי נשתמש בכל מוד?

A

GRD - for engine start, on ground arms selected ignitor, inflight both ignitors
AUTO - normally off. When eng fail (N2) both ignitors activates. (“Auto relight”). Automatic ignition to selected ignitors when flaps not up uner 18000’ or eng anti-ice
CONT - provides ignition to selected ignitors, inflight and N2 below idle provides to both ignitors
FLT - ignition to both ignitors

21
Q

Autopilot (A/P) Disengage Light

A

Illuminated (red)
• flashes and tone sounds when autopilot has disengaged.
4X-EHF, 4X-EHH, 4X-EHI
• flashes and tone sounds when an autopilot engage attempt is made and is unsuccessful.
• reset by pushing either disengage light or either A/P disengage switch.
• steady for any of following conditions:
• stabilizer out of trim below 800 feet RA on dual channel approach
• ALT ACQ mode inhibited during A/P go–around if stabilizer not trimmed for single A/P operation
• disengage light test switch held in position 2

  • automatic ground system tests fail. Illuminated (amber) –
  • steady – disengage light test switch held in position 1.
  • flashing – A/P automatically reverts to CWS pitch or roll while in CMD. Resets by pushing either light or selecting another mode.
22
Q

אופציות לניתוק טייס אוטומטי

A
  1. pushing either A/P disengage switch
  2. G/A with single A/P
  3. pushing an illuminated A/P ENGAGE switch
  4. pushing the A/P DISENGAGE bar down
  5. activating either pilot’s control wheel trim switch
  6. moving the STAB TRIM AUTOPILOT cutout switch to CUTOUT
23
Q

Stabilizer Out Of Trim (STAB OUT OF TRIM) Light

A

Operates only with autopilot engaged. Remains extinguished with autopilot not engaged.
Illuminated (amber) – autopilot not trimming stabilizer properly

737 (5 decks)

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