Part 121 Flashcards
what aircraft is part 121 relevant to
- MEA
- air transport operations; and
- max seat > 9; OR
- MTWO > 8618kg
define additional fuel
supplementary fuel required to allow for flight from from CP with most demanding of: - ENG FAIL - DEPRESSURISTION and: - fly to ALTN - hold 15 mins @ 1500' - approach and land
define final reserve fuel
- 30 mins over airport
- 1500’
- ISA
- hold speed
- estimated arrival weight
define isolated destination aerodrome
If RELEVANT DEST ALTN TRIP FUEL + FINAL RESERVE > fuel required to hold at cruise altitude for 2 HOURS at DEST + FINAL RESERVE FUEL
define relevant weather conditions
- CLOUD = > SCT
- VIS = anything limiting VIS (incl. PROB 30/40)
- WIND = any wind component (head, cross, tail) that exceeds aircraft limit
- THUNDERSTORMS (incl. PROB 30/40)
what does ETU stand for
Estimated Time of Use
what are the ETUs for the different scenarios
+/- 30 minutes for all except ISOL DEST AERODROME which = -30/+60
when does a PROB 30/40 no longer cause requirements
first 3 hours of TAF3
when is a takeoff alternate required
within +/- 30 mins ETD relevant weather exists < landing minima (adjusted for SEO)
what are the requirements for a departure alternate:
- (distance from departure airport)
- (weather requirements)
- distance:
within 1 hour flight time in SEO, still air, estimated takeoff weight (430nm) - weather conditions:
no relevant weather forecast below the landing minima (considering SEO)
note: INTER/TEMPO PROB 30/40 periods are not relevant
when is a destination ALTN required
- Ceiling: MDA for planned approach + 1000’ OR CIRCLING approach + 500’ if circling
- Visibility: higher of:
- VIS for planned approach + 2000m; OR
- 5000m
- Lighting:
- portable - unless RP
- NO STBY - RP with portable lights
- PAL AND STBY - RP to manually switch them on
note: light requirement for RP from ETA-30mins to completion of taxi OR first light+10mins
not required if HOLD FUEL carried for first light+10mins
when does the TAF3 rule apply
within 1 hour flight time of DESTINATION
what does the TAF 3 rule allow you to do
reduces the ALTN requirements to the 4.11 table
what are ALL the conditions required to apply the TAF3 rule
- within 1 hour flight time of intended DEST
- TAF3 appended to forecast
- ETA -30/+60 wholly contained within the TAF3 validity period
- ETA -30/+60 = NO relevant weather < 4.11 table (200’/800m OR 400’/circling & 800m/circling OR LSALT+500’/8000m)
- ETA +60 NO ATS delay in addition to what is already being carried
when are 2 DESTINATION ALTERNATES required AND what is the exception to the rule
- relevant weather below landing minima; OR
- no forecast
EXCEPTION: - if 1 planned alternate has all the requirements as if it were a DEST ALT (+1000’/+500’ and higher of 5000m/+2000m)