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April 23, 2008
Federal Aviation
Administration
79
ACN-PCN – Case Study
Traffic Information
Airplanes used to design original pavement section
AIRPLANE Gross Wt lbs Annual Departures
A300-b4 std 375,000 3,102
B737-700 174,700 111,952
A380 basic body 1,235,000 75
A380 basic wing 1,235,000 75
B727-100 alt 172,000 382
B737-400 150,500 83,884
B747-400 873,000 918
B757-200 250,000 19,851
B787-8 478,000 9,875
B777-300 baseline 662,000 6,141
DC8-63/73 358,000 299
DC9-51 115,000 32
DC-10-10 458,000 1,726
MD-11ER 621,000 166
80
Transportation Systems Workshop
April 23, 2008
Federal Aviation
Administration
80
ACN-PCN – Case Study
Traffic Information
AIRPLANE Gross Wt lbs
Annual
Departures
Individual
Required
Thickness In
12.98
17.37
10.60
11.59
12.02
15.58
12.29
11.44
14.93
12.66
11.58
9.3
12.06
11.96
A300-b4 std 375,000 3,102
B737-700 174,700 111,952
A380 basic body 1,235,000 75
A380 basic wing 1,235,000 75
B727-100 alt 172,000 382
B737-400 150,500 83,884
B747-400 873,000 918
B757-200 250,000 19,851
B787-8 478,000 9,875
B777-300 baseline 662,,000 6,141
DC8-63/73 358000 299
DC9-51 115,000 32
DC-10-10 458,000 1,726
MD-11ER 621,000 166
Thickest Requirement
Per current
procedure – this
would become
the “design”
airplane
81
Transportation Systems Workshop
April 23, 2008
Federal Aviation
Administration
81
ACN-PCN – Case Study
Traffic Information – Determine Equivalent Annual Departures
AIRPLANE Gross Wt lbs
Annual
Departures
Equivalent
Annual
Departures
6,568
111,952
288
444
365
37,150
3,369
6,292
79,079
49,310
503
17
8,458
755
A300-b4 std 375,000 3,102
B737-700 174,700 111,952
A380 basic body 1,235,000 75
A380 basic wing 1,235,000 75
B727-100 alt 172,000 382
B737-400 150,500 83,884
B747-400 873,000 918
B757-200 250,000 19,851
B787-8 478,000 9,875
B777-300 baseline 662,000 6,141
DC8-63/73 358,000 299
DC9-51 115,000 32
DC-10-10 458,000 1,726
MD-11ER 621,000 166
Total equivalent annual departures = 304,550
82
Transportation Systems Workshop
April 23, 2008
Federal Aviation
Administration
82
ACN-PCN – Case Study
Traffic Information
Allowable load of B737-700 with 304,550 annual
departures to match existing 18.25 inch PCC
From COMFAA
Load = 174,700 lbs
83
Transportation Systems Workshop
April 23, 2008
Federal Aviation
Administration
83
ACN-PCN – Case Study
Traffic Information
PCN value for the following conditions
Design Airplane = B737-700 at 174,700 lbs
Equiv. Annual Departures = 304,550
Category B subgrade
PCN = 51/R/B/W/T
84
Transportation Systems Workshop
April 23, 2008
Federal Aviation
Administration
84
ACN-PCN – Case Study
Traffic Information
PCN = 51/R/B/W/T
However, several airplanes included in the original pavement design
will exceed this PCN.
For example, the B777-300 has a ACN range of 28 – 68
To meet the 51/R/B rating the B777-300 would be weight restricted to
547,000 lbs (reduced by 115,000 lbs from pavement design weight)
85
Transportation Systems Workshop
April 23, 2008
Federal Aviation
Administration
85
ACN-PCN – Case Study
Traffic Information – ACN for each airplane
AIRPLANE Gross Wt lbs
Annual
Departures ACN/R/B
3102
111952
75
75
382
83884
918
19851
9875
6141
299
32
1726
166
A300-b4 std 375000 59.2
B737-700 174700 50.5
A380 basic body 1235000 67.7
A380 basic wing 1235000 66.8
B727-100 alt 172000 49.2
B737-400 150500 44.5
B747-400 873000 62.6
B757-200 250000 35.5
B787-8 478000 68.3
B777-300 baseline 662000 68.9
DC8-63/73 358000 60.0
DC9-51 115000 34.2
DC-10-10 458000 56.4
MD-11ER 621000 67.7
Indicates some
reduction in
operation weight
would be required
if a PCN of 51 is
selected.
86
Transportation Systems Workshop
April 23, 2008
Federal Aviation
Administration
86
　
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