3d plane fuselage parts have pin holes

[langley51 0]

I am printing 3d plane parts / fuselage parts and I am getting alot of thin areas with pin holes. I am using ESUN PLA+ , 

temp is 220 nozzle , bed 60

 Layer height: .25

Shell: wall line count 1

Cooling : enabled  Fan speed : 30

220 nozzle temp , bed : 60. 

Infill : 0

Print speed:  50

Travel : enabled retraction

Mesh Fixes: union overlapping volumes (checked)

Special Modes: Surface mode normal

 

 

[langley51 0]

Using Cura 4.8.0