Technical Flashcards
(160 cards)
What does TCH mean on a Jepp chart?
Threshold crossing height.
What is the rule of thumb for determining how many miles out you should begin your descent?
How much altitude to lose times 3. (divide by 1,000).
I.E. Need to lose 30,000’
30,000 X 3 = 90,000
90,000 / 1,000 = 90.
90 Miles (add 10 miles for buffer/ slow down)
How do you determine rate of descent that is required for descent planning?
- ) Half your ground speed
- ) Add a zero
400 knots / 2 = 200 knots.
Add a zero = 2,000 FPM
Practice strange METAR and TAF’s
Youtube
When do you need an alternate?
- DOMESTIC: When 1 hour before to 1 hour after ETA, weather is less than 2,000’ ceiling, or 3SM visibility.
- FLAG/SUPPLEMENTAL: Always required. (If it is not available the following must be met: Enough fuel to get to destination, then fly for 2 hours at normal cruise, standard temp.)
What are 121 fuel requirements for DOMESTIC ops?
DOMESTIC: Fly to destination, then furthest alternate, then hold for 45 minutes.
What are 121 fuel requirements for FLAG/SUPPLEMENTAL?
1.) FLAG over 6 hours or SUPPLEMENTAL: Fly to destination, then furthest alternate, plus 10% of total fuel required to get from departure to destination, then finally 30 minutes of fuel at 1,500’ AFE.
(FLAG under 6 hours is standard domestic requirements)
2.) If no alternate is suitable (island), then you need 2 hours of fuel at normal cruise once you arrive at destination.
When do you need a takeoff alternate?
When weather at departure airport is below landing minimums.
When a takeoff alternate is required, what is required of that alternate airport?
- For aircraft with 2 engines: Must be within ONE hour at normal cruise, still air, one engine inoperative.
- For aircraft with more than 2 engines: Must be within TWO hours at normal cruise, still air, one engine inoperative.
- Takeoff alternate must have weather at or above minimums (derived.)
What are STANDARD (not ops spec) 121 takeoff minimums?
- 2 engines or less: 1 SM (5,000 RVR)
- More than 2 engines: 1/2 SM (2400 RVR)
Magnetic VS True on certain wind reports
Magnetic: ATIS, D-ATIS, ASOS/AWOS
True: METAR, TAF, Winds Aloft
“Hear it, magnetic. Read it, true.” (except for D-ATIS).
METAR: LEAS 090600Z 29010G20 250V320 8000 FEW 010 17/16 Q1017 TEMPO 3000 BR BKN004
What is the “8000” after the variable wind report?
It is visibility. In this case it is 8,000 meters.
METAR: LEAS 090600Z 29010G20 250V320 9999 FEW 010 17/16 Q1017 TEMPO 3000 BR BKN004
What is the “9999” after the variable wind report?
Visibility 10 Kilometers or better generates code “9999”
METAR: LEAS 090600Z 29010G20 250V320 0000 FEW 010 17/16 Q1017 TEMPO 3000 BR BRK 004
What is the “0000” after the variable wind report?
Visibility is less than 50 meters. Generates code “0000”
METAR: LEAS 090600Z 00000KT 1400 R29/0700 FEW 010 BKN022 17/16 Q1017 TEMPO 3000 BR BKN004
What is the “R29/0700” mean?
Runway 29 RVR is 700 METERS
When are RVR reports typically generated?
In the US: RVR is used when visibility is 1SM or less or 6,000RVR or less
ICAO: When visibility is 1500 meters or less
METAR: LEAS 090600Z 00000KT 1400 R29/P1500 FEW 010 BKN022 17/16 Q1017 TEMPO 3000 BR BKN004
What does “R29/P1500” mean?
RVR greater than maximum visibility value of 1500 meters
METAR: LEAS 090600Z 00000KT 1400 NSC 17/16 Q1017
What does “NSC” mean?
No significant clouds
METAR: LEAS 090600Z 00000KT CAVOK 17/16 Q1017
What does “CAVOK” mean?
Ceiling and visibility OK
Meaning ceiling is greater than 5000 feet and visibility is greater than 10 kilometers or 6SM
also no significant clouds
METAR: LEAS 090600Z 00000KT CAVOK 17/16 Q1017
What does Q1017 mean?
Pressure, or “QNH”
It is represented by the letter Q, followed by the actual pressure in hectopascals.
NOTE: If QNH is less than 1,000 millibars (hectopascals), it will be first a zero, then the actual value
I.E. Q0997 = 997 hPa/Mb
METAR: LEAS 090600Z 29010G20 250V320 9999 FEW 010 17/16 Q1017 RERA
What does “RERA” mean?
“RE” means RECENT. Significant weather occurred within the last hour or since last METAR.
“RERA” simply means recent rain
METAR: LEAS 090600Z 29010G20 250V320 9999 FEW 010 17/16 Q1017
TEMPO FM1020 TL1220 1000 +SHRA
What does this TEMPO forecast tell you?
TEMPO= Temporarily FM1020= From 1020Z TL1220= Until 1220Z 1000= 1,000 meters of visibility \+SHRA= Heavy rain showers
METAR: LEAS 090600Z 29010G20 250V320 9999 FEW 010 17/16 Q1017 NOSIG=
What does NOSIG= mean?
NOSIG: No significant CHANGES expected within the next 2 hours
=: An equal symbol denotes the end of the METAR
METAR NZAA 201930Z AUTO 31002 9999 NCD 21/18 Q1013 NOSIG=
What is AUTO?
METAR generated automatically by WX equipment around the airport.