FAA Advisory Circular 43.13-1B
Acceptable Methods, Techniques, and Practices
Aircraft Inspection and Repair
AC 43.13-1B | 9. Aircraft Systems and Components | 2. Hydraulic Systems | 9-30. Hydraulic Lines and Fittings
AC 43.13-1B
TABLE 9-3. Aircraft hose specifications.
9/8/98
SINGLE WIRE BRAID FABRIC COVERED
MIL.
PART NO.
MIL-H-8794- 3-L
MIL-H-8794- 4-L
MIL-H-8794- 5-L
MIL-H-8794- 6-L
MIL-H-8794- 8-L
MIL-H-8794-10-L
MIL-H-8794-12-L
MIL-H-8794-16-L
MIL-H-8794-20-L
MIL-H-8794-24-L
MIL-H-8794-32-L
MIL-H-8794-40-L
MIL-H-8794-48-L
TUBE
SIZE
O.D.
3/16
1/4
5/16
38
1/2
5/8
3/4
1
1 1/4
1 1/2
2
2 1/2
3
HOSE
SIZE
I.D.
1/8
3/16
1/4
5/16
13/32
1/2
5/8
7/8
1 1/8
1 3/8
1 13/16
2 3/8
3
HOSE
SIZE
O.D.
.45
.52
.58
.67
.77
.92
1.08
1.23
1.50
1.75
2.22
2.88
3.56
RECOMM.
OPER.
PRESS.
3,000
3,000
3,000
2,000
2,000
1,750
1,750
800
600
500
350
200
200
MIN.
BURST
PRESS.
12,000
12,000
10,000
9,000
8,000
7,000
6,000
3,200
2,500
2,000
1,400
1,000
800
MAX.
PROOF
PRESS.
6,000
6,000
5,000
4,500
4,000
3,500
3,000
1,600
1,250
1,000
700
300
300
MIN
BEND
RADIUS
3.00
3.00
3.38
4.00
4.63
5.50
6.50
7.38
9.00
11.00
13.25
24.00
33.00
Construction: Seamless synthetic rubber
inner tube reinforced with one fiber braid,
one braid of high tensile steel wire and cov-
ered with an oil resistant rubber impregnated
fiber braid.
Identification: Hose is identified by specifi-
cation number, size number, quarter year
and year, hose manufacturer’s identification.
Uses: Hose is approved for use in aircraft
hydraulic, pneumatic, coolant, fuel and oil
systems.
Operating Temperatures:
Sizes-3 through 12: Minus
65 °F. to plus 250 °F.
Sizes - 16 through 48: Minus
40 °F. to plus 275 °F.
Note: Maximum temperatures and pressures
should not be used simultaneously.
MULTIPLE
TUBE
MIL
SIZE
PAR NO.
O.D.
MIL-H-8788- 4-L
1/4
MIL-H-8788- 5-L
5/16
MIL-H-8788- 6-L
3/8
MIL-H-8788- 8-L
1/2
MIL-H-8788-10-L
5/8
MIL-H-8788-12-L
3/4
MIL-H-8788-16-L
1
WIRE
HOSE
SIZE
I.D.
7/32
9/32
11/32
7/16
9/16
11/16
7/8
BRAID
HOSE
SIZE
O.D.
0.63
0.70
0.77
0.86
1.03
1.22
1.50
RUBBER COVERED
RECOMM.
MIN.
MIN.
OPER.
BURST PROOF
PRESS.
PRESS. PRESS.
3,000
16,000
8,000
3,000
14,000
7,000
3,000
14,000
7,000
3,000
14,000
7,000
3,000
12,000
6,000
3,000
12,000
6,000
3,000
10,000
5,000
MIN.
BEND
RADIUS
3.00
3.38
5.00
5.75
6.50
7.75
9.63
Hose Construction: Seamless synthetic rubber inner
tube reinforced with one fabric braid, two or more steel
wire braids, and covered with a synthetic rubber cover (for
gas applications request perforated cover).
Identification: Hose is identified by specification number,
size number, quarter year and year, hose manufacturer’s
identification.
Uses: High pressure hydraulic, pneu
matic, coolant, fuel and oil.
Operating Temperatures:
Minus 65 °F. to plus 200 °F.
Page 9-22
Par 9-30