AD-47-21-04
Fuel Tank Scupper

Category:navion, fuel

Applicability: Applies to Serial Numbers NAV-4-2 Through 21, 24 Through 29, 32, 35, 36, 40, 42 Through 47, 57, 192, 199, 251.

Supersedes: Was mandatory Note 3 of AD-782-3

Compliance: Accomplish no later than August 1, 1947.

Procedure:The original fuel filler scupper will collect spilled gasoline since no drain line is provided. In addition, the thickness of material is insufficient to prevent damaging by the filler hose nozzle. To eliminate these conditions, a redesigned scupper with drain line is to be installed per NAA Drawing 145-89010.

NAA Field Service Bulletin No. 2 covers this same subject.


AD-47-21-04