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however, many pilots have come to use the term
as if that is what it does mean — the “Great
Expectation.” A pilot writes:
“ … A second problem is that ATC did not
give priority handling when we advised them
of minimum fuel.”
Just as pilot and controller expectations may be
quite varied, you can see their that responses
are equally so. When information is passed from
controller to controller, some information may
get lost or misinterpreted. Each party, controller
and pilot, has a specific job to accomplish. Those
jobs can be accomplished with understanding,
cooperation, and professionalism.
“After several attempts to acquire an EFC
[expect further clearance] time or an indication
of what delays were in effect, and with no
definite reply, the Captain explained that fuel
might be a problem. The Controller asked if
[our] flight was declaring a ‘minimum fuel
state.’ The Captain [then] declared ‘minimum
fuel.’ Shortly thereafter, [the] flight received
clearance to its planned FL330 and was given
clearance enroute. With the subsequent
helpful assistance from ATC, the flight
proceeded to BOS [Boston] with no further
problem.”
Take AIM
Let’s review what the Airmans Information
Manual (AIM) states regarding minimum fuel.
5-85. MINIMUM FUEL ADVISORY
a. Pilot –
1. Advise ATC of your minimum fuel status
when your fuel supply has reached a state
where, upon reaching destination, you cannot
accept any undue delay.
2. Be aware this is not an emergency
situation, but merely an advisory that indicates
an emergency situation is possible should any
undue delay occur.
3. Be aware a minimum fuel advisory does
not imply a need for traffic priority.
4. If the remaining usable fuel supply
suggests the need for traffic priority to ensure a
safe landing you should declare an emergency
account low fuel and report fuel remaining in
minutes. (Reference — Pilot/Controller Glossary,
Fuel Remaining).
Note that this portion, referencing pilots
specifically, states this advisory does not imply
a need for traffic priority. What to do if the
need for traffic priority develops? The message
is clear — declare an emergency.
Let’s carry on with part (b) of the 5-85. Minimum
Fuel Advisory, and see what is recommended
for the controller.
b. Controller –
1. When an aircraft declares a state of
minimum fuel, relay this information to the
facility to whom control jurisdiction is transferred.
2. Be alert for any occurrence which might
delay the aircraft.
Note that the minimum fuel declaration is an
advisory only, it is not a specific request for
priority handling. It should be considered a
“yellow caution flag” indicating future problems
may develop if undue delays occur.
ASRS Directline Summer 1992 13
Minimum Fuel
Advice for Controllers
What can you do to reduce both risk
and frustration?
❖ Be aware of the nuances of a minimum fuel
statement. What is the flight crew really
saying? You may need to question the flight
crew until the situation is mutually understood
❖ Remember to relay to the next controller the
“minimum fuel” status of any aircraft
❖ Keep your expectations within the limitations
of the advisory on minimum fuel.
So, take a fresh look at the term “minimum
fuel.” Do you and the AIM interpret it the same
way?
Final Thoughts
One ASRS reporter presented an interesting
suggestion that would keep everyone informed
of an unusual or abnormal fuel state:
“ … [I] believe that an aircraft that is in a
situation other than [a] completely normal
fuel state should be assigned a specific
transponder squawk that is clearly and
universally defined to both pilots and controllers,
[which] … [indicates the low fuel]
situation to all.”
Excellent food for thought. This suggestion
would keep communications to a minimum,
would be passed along on the data block from
sector to sector, or to another facility. The pilot
could be asked to state specifics of the situation,
which would hopefully clarify the situation for
all parties. An interesting proposal to consider.
It has also been suggested that the FAA develop
an ATC computer enhancement that keeps
track of flying time remaining — as stated by
the pilot during minimum fuel situations. At an
appropriate time before fuel exhaustion, the
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