AD 73-24-02

73-24-02 SEMCO: Amendment 39-1746 is further amended by Amendment 39-2741. Applies to Model 30-AL, Serial Numbers SEM C1, SEM C2, SEM 11 to SEM 118 inclusive, Model TC-4A, Serial Numbers SEM 81 to SEM 118 inclusive, and Model "Model T," Serial Numbers SEM 28, SEM 60, SEM 61, SEM 62, SEM 64 through SEM 73, SEM 76, SEM 77 and SEM 78 to SEM 118 inclusive balloons certificated in all categories.

Compliance required within the next 25 hours time in service after the effective date of this AD, unless already accomplished.

To prevent inadvertent fuel leakage accomplish either 1 or 2 below:

1. (a) Remove the Amflo quick change female coupler part number C-2 from the lower end of the Imperial fuel hose Part Number Y905. NOTE: This is the vertical fuel hose connecting the tank to the burner valve.

(b) Install an Amflo quick change male plug Part Number CP-2 or an equivalent part approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region, on the lower end of the Imperial fuel hose Part Number Y905.

(c) Remove the Amflo quick change male plugs Part Number CP-1 from the fuel tank 1/4" brass tee. (d) Install an Amflo quick change female coupler Part Number C-1 or an equivalent part approved by Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region, into the fuel tank 1/4" brass tee.

2. (a) Remove the Amflo quick change female coupler Part Number C-2 from the lower end of the Imperial fuel hose part number Y905. NOTE: This is the vertical fuel hose connecting the tank to the burner valve.

(b) Remove the Amflo quick change male plug, Part Number CP-1, from the fuel tank 1/4" brass tee. (c) Install an AN 901-2 coupling and the Amflo quick change male plug part number CP-1 which was removed in step (b) or equivalent parts approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region, onto the lower end of the Imperial fuel hose Part Number Y905.

(d) Install an AN 911-2 nipple and the Amflo quick change female coupling Part Number C-2 which was removed in step (a) or equivalent parts approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region, into the 1/4" brass tee at the fuel tank.

Amendment 39-1746 became effective November 26, 1973. This amendment 39-2741 becomes effective October 20, 1976.