August 24

Mr. Marc

Acting Ch

Federal A

800 Indep

Washingt

Dear Mr.

In reviewi

inadverte

underlyin

At Washin

hour and

USAirway

up with U

by United

internal tr

actual usa

January‐F

and Mond

before an

Due to th

that occu

the integr

those wit

has had a

constraine

to ensure

Since rece

schedule







4, 2011

Warren

ief Counsel, A

viation Admin

pendence Ave

on, DC  2059

Warren,

ing the data i

nt and uninte

g this error to

ngton Reagan

01593 in the

ys during the J

USAirways, it w

d.   United’s re

racking again

age earlier, w

ebruary perio

days through

ny weather wa

e quantity of

r, United (and

rity of all of it

h limited slot

n excellent re

ed airports.  W

the integrity

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assignmen

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address w

AGC‐1

nistration

enue, SW

1

n your letter

entional error

o FAA represe

n National Air

2100 with th

January – Feb

was determin

eported slot u

st such reduc

we would have

od, United ha

Fridays in the

aivers.   

slots held by

d other carrie

s data record

holdings, sub

ecord of com

We sincerely

y of our record

tter in July, U

ance complia

g personnel p

nt of responsi

ng a full and c

r season forw

ting a numbe

hen and how

of July 28, 20

r in the slot m

entatives wor

rport (“DCA”)

he understand

bruary 2011 r

ned that these

usage reflecte

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ad actual utiliz

e 1900 hour a

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ds.  United ha

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United has tak

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management

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ed the assum

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ngs necessary

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s actively trad

ly slot filings

ll reporting re

nprecedented

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ken significan

actions includ

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her trained in

dit of the Unit

have an agree

hensive chang

re “slotted”.

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database.  Un

over the last

ned and oper

tions of these

iod. After rec

s had not bee

ed reduced n

n compliance

y to ensure co

overall slot ho

ur were both

airports and

gs) faces the

ded with all g

and maintain

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d occurrence

nt actions to e

e:

oval of individ

dividuals.   

ted slot holdi

ed and clean

ges in our sch

etermined the

nited has pro

few weeks.  

rated slots 01

e were transf

ceipt of your l

en fully comp

number of slo

.  Had United

ompliance.  O

oldings at DCA

over 80 perc

the number o

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for operation

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ensure databa

duals from th

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ns at the capa

what is necess

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opment proce

tails

900

low‐

nded

nd

e

ent

eriod

ns

uring

lly

nited

acity

sary

and

re‐

AA for

ess to
Mr. Marc

August 24

Page 2 of







As outline

While we

period, th

learn did

voluntary

that was u

I and ever

Respectfu

Michele B

Director, A

cc: R

Warren

4, 2011

3

Increasing

senior lead

Control Ce

Conductin

was opera

calculation

immediate

Reviewing

additional

ed, United is t

understand t

his was prima

not occur.  To

y return of the

utilized over 8

ryone involve

ully submitted

Boyce

Airport Acces

ob Hawks

transparency

dership throu

enters who m

g a thorough

ting/reportin

n errors on tw

ely reported t

other means

compliance c

taking numer

this error cau

rily driven by

o address the

e day 6 portio

80 percent in

ed in the slot

d,

ss

y in the slot a

ugh all analyst

anage the flig

review of ou

ng as expected

wo of the mos

to Sabre.

s in which aut

checks and m

rous actions t

used these tw

y the erroneou

e infraction, U

on of these tw

the period.

process are  c

allocation pro

ts who work i

ghts on day‐o

ur slot manage

d during  whi

st commonly

tomation cou

monitor usage

o address all

wo individual s

us belief of a

United respec

wo slots and n

completely at

ocess through

in the schedu

of‐operation.

ement tool, S

ch we found

used reports

uld be added o

.  

issues.   

slots to show

single day we

tfully request

not withdraw

t your disposa

hout the organ

ule to those in

Sabre SlotMa

it had data d

s.  These bugs

or improved

as underutili

eekend trans

ts the FAA ac

w the remaind

al to answer a

nization from

n our Operati

nager, to ens

isplay and

s were

to perform

ized for the

sfer that we n

cept United’s

der of the slot

any question

m

ons

sure it

now

s

ts

s.   
APPENDIX

United Flights on Days for which a Slot Usage Waiver is Requested:

27Jan11

Time      Slot #     Flt #       Market

0800N   1017       607         DCAORD

01Feb

Time      Slot#      Flt#        Market

1400N   1055       621         DCAORD

1900N   1458       622         ORDDCA  

02Feb

Time      Slot#      Flt#        Market

1400N   1055       621         DCAORD

1900N   1458       622         ORDDCA  

2300N   1169       7550       ORDDCA  

1700A    3040       684         ORDLGA

1800D    3677       691         LGAORD

2000D    3847       695         LGAORD

2030A    3683       692         ORDLGA

03Feb

Time      Slot#      Flt#        Market

0800N   1017       600         ORDDCA

1700A    3040       684         ORDLGA