Fuel Policy Flashcards
(38 cards)
Pre flight planning.
What is the basic Tenant of BA fuel policy?
To land at 2 airfields or 2 RWYs at the same airfield with at least reserves in tanks. The commander must take into account any information upto the point of dispatch.
OMA 8.18.1-20
What is the weight change line on Cirrus used for?
For an increase in ZFW upto 5T
More than 5T increase requires a new cirrus
OMA 8.18.2
Define Reserve Fuel
Reserve fuel is the minimum fuel required to be remaining in tanks at normal landing.
Calculates as 30 minutes holding fuel at 1500 ft clean at Planned Landing Weight at the Alternate Airfield or destination if no alternate is required.
How is contingency fuel calculated?
1) SCF 99%, 95% or 5 mins holding fuel @ 1500’ at PLW
2) No ERA - 5% x trip fuel or 20 mins flying time at planned trip consumption
3) ERA avail - 3% x trip fuel or 20 mins flying time at planned trip consumption.
In all cases a minimum of 5 mins holding fuel @ 1500 ft clean at PLW
OMA 8.18.10
How can you dispatch with a last minute increase in fuel without refuelling?
1) CI 0
2) Reduce below statistical taxi fuel
3) reduce contingency fuel to a minimum of 5 minutes
4) Dispatch without a destination alternate
OMA 8.18.16
How can you dispatch without a destination alternate?
a) planned flight time less than 6 hrs
b) 2 independent runways
c) Visibility ETA +/- 1 hr = 5 km
d) Cloud ceiling ETA +/- 1 hr = 2000’ or circling + 500’
e) Increase reserve fuel by 50% (ie diversion fuel is replaced by 15 mins holding at 1500 ft)
OMA 8.18.8
What flight time and temperature at destination would need you to look at the tankering winter restrictions?
1 hr 15 mins - 4 hrs
OAT at destination is -2 C to + 10 C with preciptation or high himidity (Dew Point within 2 C of OAT)
Further details in OMA 8.18.19
What are the fuel penalties for changing the Cirrus weights?
1) Use cirrus wt change line or 3% /hr
2) Inc ZFW = T+C+D+R (times) x 4%
3) Inc Div = T+C (times) x 4%
4) inc Fuel = T (time) x 4%
OMA 8.18.20
Define a fuel shortfall in flight?
If a fuel check shows that the aircraft will land at destination with less than Diversion + Reserve (ie less than total reserve)
OMA 8.18.23
If you might land with less than Div+Res, what should do?
1) Reduce fuel consumption (CI 0?) and/or
2) Select a closer destination alternate
3) Or land somewhere else ie divert
OM A 8.18.23
How can you continue towards destination when a fuel check indicates less than Div+Res?
Define landing assured.
Define plausible failure of airborne equipmet.
A landing can be completed in the event of any forecast WX deterioration AND any plausible single failure of any ground AND airborne facilities (eg a failure which would downgrade the planned ldg status from Cat 3A to Cat 2)
Plausible failure - Colin Seaman definition - anything contained in the QRH!
OM A 8.18.23
What does a minimum fuel call to ATC mean?
Having committed to an aerodrome, any change to the existing clearance to that commited aerodrome may result in landing with less than reserve
OMA 8.18.24
How is a fuel emergency declared?
MAYDAY MAYDAY MAYDAY FUEL and fuel remaining in mins, when landing at the nearest Aerodrome is calculated to be less than Reserves.
OMA 8.18.24
An altitude of 4000 ft below the optimum incurs a penalty of XX % of fuel.
Same question but 8000 ft below optimum
4000 ft below — Approx 5%
8000 ft below — More than 10%
Flight more than XXXX ft above optimum FL is unlikley to be efficient except in the case of unusualy large difference in wind component
2000 ft
Flight above optimum FL is relatively LESS or MORE efficient than flight below optimum FL
LESS efficient
OM A 8.18.21
The penalty for carriage of extra fuel is about XX % of extra fuel per hour of flight
3 %
OM A 8.18.18
If there is a likelihood of a diversion at destination, then fuel should normally be carried to allow the XXXXX alternate to be reached with normal reserves
Commercial alternate
OM A 8.18.18
MAX DELAY NOT KNOWN AND EAT NOT RECEIVED
At any time, it must be possible to reach….
possible to reach at least 2 aerodromes at which landing is assured
MAX DELAY NOT KNOWN AND EAT NOT RECEIVED
If within 6 hours:
Possible to arrive at destination with at least reserve fuel + 15 mins holding fuel IF:
2 seperate rwys are available and usable at the destination ETA +/- 1hr
Vis will be at least 5 km AND ceiling at least 2000 ft or circling ht + 500 ft, whichever is the greater
MAX DELAY NOT KNOWN AND EAT NOT RECEIVED
If destination within 2 hrs flying time:
2 seperate rwys are considered to be equivalent to 2 aerodromes, provided account is taken of any likely ATC delay
(using experience and local knowledge)
MAX DELAY KNOWN OR EAT RECEIVED
At any time, the flight may continue to destination or hold, regardless of the number of runways, as long as landing is assured and it is possible to reach the destination with at least Reserve fuel remaining at touchdown
Colin Seaman - don’t commit to worse than Cat 1 airfield in LVOs - EVER! (single plausible failure…)
Forecasts should be used to assess the probability of ldg success when more than XX hours from the relevant aerodrome
Within XX hours, YYY may be used
2 hours
within 2 hours, actual weather reports and trend infomation may be used
